Process for synthesizing nano barium ferrite powder by microwave induction and low-temp combustion

Electric vehicle charging pile configuration method, recording medium and system

The invention belongs to the technical field of electric vehicle charging, and discloses an electric vehicle charging pile configuration method, which is characterized in that a user and a micro-grid operator are layered based on an electric vehicle charging load prediction model, a multi-target double-layer optimization scheduling method is adopted, and on the basis of ensuring the charging efficiency of the user, the operation efficiency of a micro-grid layer is fully considered; the space-time transfer of the charging demand of the electric vehicle is realized by using a pricing mechanism, the model is solved by using the particle swarm optimization, the limitation of the traditional optimization method is overcome, and the optimization performance is improved. The invention also provides a non-transient readable recording medium in which an electric vehicle charging pile configuration program is stored and a system comprising the medium, the program can be called through a processing ...

水基流延法制备高热导率氮化铝陶瓷基片的方法

The present invention is water-base flow casting process of preparing IC aluminum nitride ceramic substrate. Technologically, the present invention features that phosphoric acid treated aluminum nitride powder, sintering assistant and organic solvent are compounded into slurry in the material composition: aluminum nitride powder 40-60 wt%, yttrium oxide 0.5-2 wt%, dysprosium oxide 1-3 wt%, water 10-20 wt%, polyacrylate emulsion 0.2-1 wt%, PVA emulsion 20-40 wt% and glycerin 2-5 wt%; the slurry is flow cast to form plain membrane; and the plain membrane is glue eliminated and sintered to prepare aluminum nitride ceramic substrate. The said process has low cost and no pollution and is suitable for large scale production, and the prepared substrate has high heat conductivity, leveled surface.

Reciprocating type ganoderma lucidum crusher capable of brushing spore powder

The invention provides a reciprocating ganoderma lucidum crusher capable of brushing spore powder. The reciprocating ganoderma lucidum crusher comprises a base, a partition plate fixedly mounted in the center of the top of the base, a first box fixedly mounted on one side of the top of the base, and a second box fixedly mounted on the other side of the top of the base. Ganoderma lucidum is clamped through a clamping mechanism, meanwhile, a movable plate is rotated, the ganoderma lucidum is rotated into a first box, a first electric push rod pushes a first motor and a brush disc to move towards the ganoderma lucidum, and the first motor drives the brush disc to brush conidial powder; meanwhile, the brushed spore powder is collected through a suction fan and a first collecting hopper and conveyed into a collecting box for temporary storage, then the effect of brushing the spore powder is completed, meanwhile, ganoderma lucidum fragments are conveyed into a grinding shell through a second ...

Equipment and method for extracting and purifying medicinal fungi

The medicinal fungus extraction and purification equipment comprises a crushing shell and a storage shell, the surface of the crushing shell is fixedly connected with a connecting steel rod, one end of the connecting steel rod is fixedly connected with a treatment shell, the vertical section of the treatment shell is provided with a water storage ring, and the top end of the treatment shell is provided with a sealing mechanism. And cleaning the medicinal fungi with clean water to obtain the clean medicinal fungi. The medical fungus drying device is reasonable in structure, medical fungi are cleaned through a cleaning spray head, meanwhile, a stirring mechanism is started to conduct stirring treatment on the medical fungi, after cleaning, a connecting shell is heated through a heating wire, hot air enters a treatment shell in combination with a fan, and the medical fungi are dried; and the medicinal fungi are crushed by combining the crushing mechanism, so that the medicinal fungi are integrally ...

Microwave extraction method for cordate houttuynia total flavones

The invention discloses a method for microwave extracting houttuynia cordata chromocor, comprising following steps: drying houttuynia cordata and disintegrating to 60 order, adding 40% ethanol according to ratio between solid and liquid of 1: 40, immersing for 30 minutes, keeping microwave power be at 900W, irradiating for 40 seconds, cooling with ice water, irradiating for 40 seconds again, repeating the step for three times; decompression condensing ethanol extract, putting it into AB-8 macro-porous absorption resin, washing with water and then with 70% of ethanol, decompressing drying washing liquid and getting final product. The invention is characterized by simple process and convenient operation, no pollution, non toxicity, high extraction efficiency and higher product purity.

Method for preparing superfine tungsten powder

The invention discloses a method for preparing superfine tungsten powder, which comprises the following steps: A, mixing tungstate and magnesium powder according to a molar ratio of the tungstate to the magnesium powder of 1-6:3-25, then compacting the mixture and filling the mixture into a vertical annular cylinder or a disc container made of carbon felt, filling the mixture into a high-pressure container to carry out self-propagating high-temperature synthesis, and naturally cooling a synthesized product after the synthesis; and B, taking out the synthesized product to carry out material crushing, soaking the product in 1 to 10 mol/L hydrochloric acid solution for 1 to 5 hours to make MgO impurities in the product totally dissolved in hydrochloric acid, filtering the product and washing the product by deionized water repeatedly till no Cl is in the filtrate through the detection of AgNO3, and finally drying the product for 1 to 5 hours in an oven at the temperature of between 100 and ...

Super-oxygen Chinese medicinal oral liquid

A Chinese-medicinal superoxygen oral liquid is prepared from ordinary Chinese-medicinal oral liquid through pressurizing and aerating to make its oxygen content to 10-90 ml/L, and features the co-therapeutic action of both medicine and oxygen for higher curative effect.

Method for promoting Sialon ceramic agglutinating densification

The present invention relates to a method for accelerating sialon ceramic sintering compaction by applying a layer of sizing material on the surface of sialon sample. Said sizing material is made up by using Si3N4, AlN or Si, nd YAM2Y2O3.Al2O3), YAG(3Y2O3.5Al2O3), Al2O3, Y2O3, SiO2 or C powder and PVB (polyvinyl butyral), and one or several kinds of anhydrous acids (phosphoric acid, boric acid, silicic acid, acetic acid and oxalic acid) or their inorganic or organic derivatives at least containing one acid radical, adding anhydrous alcohol and mixing them. After having been sintered, the porosity of the sialon sample coated with said sizing material can be obviously reduced.

Preparation for combustion synthesis of beta-silicon nitride stick grain with magnesium silicon nitride as growth aid

The invention discloses the preparation for combustion synthesis of beta-silicon nitride stick grain with magnesium silicon nitride as growth aid, wherein the commercial silicon powder, alpha-Si3N4 powder are mixed by the proportion of 9-5 : 1-5, the added MgSiN2 is used as growth auxiliary agent for reaction in 1-10 MPa nitrogen, and the novel silicon magnesium nitride is employed as the rod crystal growth auxiliary agent.

Leadless thick film conductor slurry composition for aluminium nitride substrate

A lead-free thick-film conductor slurry composition used inaluminum nitride substrate characterizes that the conductor slurry is composed of conducting power: 50-80 wt%, lead-free Ba borosilicate Ca class glass powder; 1-15 wt% and organic media. The Ba borosilicate Ca class glass powder contains: (wt%) SiO210-30, B2O3 15-50, CaO15-45 BaO10-30, Al2O3 1-5, K2O1-5, Na2O1-10 with 0.5 CuO or TiO2 addition. The organic media are composed of organic adhesive: 1-20% and organic solvent 80-90 wt% with the advantages of lead-free, low resistance on the thick-film conductor surface and strong adhesion with Al nitride ceramics substrate suitable for thick-film IC.

由硅化镁燃烧合成氮化硅镁粉体的制备方法

The magnesium silicide burning process of synthesizing silicon magnesium nitride powder belongs to the field of non-oxide ceramic powder preparation. Magnesium silicide or the mixture of magnesium silicide and alpha-Si3N4 as initial material and through the reaction in nitrogen or nitrogen plus hydrogen of 1-10 MPa, the silicon magnesium nitride powder is prepared. The production process needs no briquetting, and the reaction is performed in a ring or disc container of carbon felt. Compared with available technology, the burning synthesizing process of the present invention has the advantages of no environmental pollution, low power consumption, and being suitable for industrial production. The synthesized product has high purity and controlled oxygen content and may be used as the additive for ceramic material, electronic sealing material, etc.

Traditional Chinese medicine preparation grinding device with adjustable fineness

The invention provides a traditional Chinese medicine preparation fineness-adjustable grinding device, and relates to the technical field of medicinal material processing, the traditional Chinese medicine preparation fineness-adjustable grinding device comprises a support, a shell and an impurity removal bin; a partition plate is fixed to the upper end of the support, a first motor is installed on the partition plate through a bolt, a belt wheel is installed on a rotating shaft of the first motor, and a conveying belt is installed on the support. The shell is fixed to the support, and the top cover is installed at the upper end of the shell through bolts. The impurity removal bin is mounted at the upper end of the top cover through bolts; medicinal material particles are poured into a hopper, a rotary disc is driven by a second motor to rotate, the medicinal material particles in a through groove fall into a leakage cylinder through leakage holes in a base plate, the medicinal material ...

Process for synthesizing nano barium ferrite powder by microwave induction and low-temp combustion

A process for synthesizing nanometre BaFe12O19 powder includes such steps as proportionally mixing the inorganic salt (nitrate or carbonate) of Ba2+ or Fe3+, citric acid and chloride (potassium chloride, sodium chloride, or their combination in mol ratio of NaCl/KCl=1:0.5-1.5), microwave inducing, low-temp. combustion for 2-10 min, heat treating under 900 deg.c for 0.2-10 hr and water washing to obtain nanometre hexagonal crystal of BaFe12O19. Its advantages are simple process, low energy consumption, and regulatable magnetic performance of product.

Application of 3-azido-N-(3-chloro-2-cyanophenyl)-2-methyl-2-(phenylseleno) propanamide in preparation of tyrosinase inhibitor

The invention belongs to the field of pharmacy, and particularly relates to a 3-azido-N-(3-chloro-2-cyanophenyl)-2-methyl-2-(phenylseleno) propanamide compound and application of the 3-azido-N-(3-chloro-2-cyanophenyl)-2-methyl-2-(phenylseleno) propanamide compound in preparation of a tyrosinase inhibitor. The compound provided by the invention is prepared by a non-metal-catalyzed alkene azidation selenylation method, is a red liquid, and has a molecular formula of C17H14ClN5OSe.

Wind and solar hybrid generating system based on Z source

The invention relates to a wind and solar hybrid generating system based on a Z source, belonging to the field of new energy generation and aiming to provide users with a safe and stable power sourceby utilizing wind energy and solar energy common in nature. The invention adopts a pressure-boosting device based on a Z source circuit structure and a tracking control strategy based on DSP to achieve a variable-step perturbation observation method. The wind and solar hybrid generating system based on the Z source comprises a charging and discharging controller, an energy-storing accumulator andan inventor. A wind and solar hybrid controller converts wind energy captured by a wind-driven generator into a direct current by utilizing a rectifier; and the energy-storing device (accumulator) ischarged by the direct current and solar energy captured by a solar panel; the inventor releases electric energy stored in the accumulator and stably outputs an alternating voltage of 220V by a certaincircuit ...

QICK PREPARATION METHOD FOR THE REACTION SINTERING MATERIAL OF HIGHLY COMPACT SILICON NITRIDE

Low temperature sintering method for high hardness silicon nitride ceramics

The low temperature sintering process of high hardness Si3N4 ceramic with MgSiN2 as sintering assistant belongs to the field of non-oxide ceramic preparing technology. The high performance Si3N4 ceramic is prepared with alpha-Si3N4 powder and MgSiN2 in the ratio of 100 to 2-10, and through mixing and hot pressing sintering. During the preparation, the material is first formed at 2 MPa pressure, then filled into graphite mold and finally hot pressing sintered at 10-30 MPa and 1600-1700 deg.c for 1-5 hr. The prepared Si3N4 ceramic has excellent comprehensive mechanical performance, including hree-point breaking strength higher than 800 MPa, fracture toughness higher than 5.00 MPa.m1/2, and hardness HV higher than 19 GPa.

Compound buccal lozenge as Chinese medicine for protecting eyes and refreshing brain

A compound buccal lozenge for protecting eyes and refreshing brain is prepared from 9 Chinese-medicinal materials including mulberry fruit 4-8 wt.%, euryale seed 4-8 wt%, cassia seed 4-8 wt%, mint 4-8 wt%, etc through decocting six of the raw materials, such as mulberry fruit, euryale seed, etc. concentrating, depositing in alcohol, recovering alcohol to obtain extract A, decocting the rest, suchas chrysanthemum flower, etc. concentrating to obtain extract B, mixing extracts A and B, sugar and lactose, and tabletting.

Method for preparing superfine tungsten powder

The invention discloses a method for preparing superfine tungsten powder, which comprises the following steps: A, mixing tungstate and magnesium powder according to a molar ratio of the tungstate to the magnesium powder of 1-6:3-25, then compacting the mixture and filling the mixture into a vertical annular cylinder or a disc container made of carbon felt, filling the mixture into a high-pressure container to carry out self-propagating high-temperature synthesis, and naturally cooling a synthesized product after the synthesis; and B, taking out the synthesized product to carry out material crushing, soaking the product in 1 to 10 mol/L hydrochloric acid solution for 1 to 5 hours to make MgO impurities in the product totally dissolved in hydrochloric acid, filtering the product and washing the product by deionized water repeatedly till no Cl<-> is in the filtrate through the detection of AgNO3, and finally drying the product for 1 to 5 hours in an oven at the temperature of between 100and ...

自蔓延高温合成低成本复相α/β－赛隆粉体的制备方法

The present invention is high-temperature self-spreading process of synthesizing alpha/beta-Sialon powder at low cost and belongs to the field of the superfine non-oxide powder preparation. Metallic silicon, metallic aluminum powder, slag or some natural mineral or their mixture and Sialon powder in certain proportion are mixed and nitrogen in 3-15 MPa is led in to prepare alpha-Sialon powder. The said process features no need of pressing block in advance, reaction completed in a vertical annular or disc container of carbon felt, the addition of Sialon additive as crystal seed and diluent, low cost, low impurity content in the reaction system and loose combustion product.

500KV vacuum circuit breaker topological structure

The utility model relates to a 500KV vacuum circuit breaker topological structure, include: 80kV vacuum circuit breaker module (1) and the 500kV vacuum circuit breaker of utmost point post (104) are sealed based on the double break mouth admittedly, admittedly, 80kV vacuum circuit breaker module (1) of sealing utmost point post (104) based on the double break mouth is formed by two 40.5kV vacuum interrupter series connection, 500kV vacuum circuit breaker is established ties by six 80kV vacuum circuit breaker module (1) and the voltage -sharing forms. The utility model discloses can realize that 500kV capacitive vacuum cut -offs not have and restrike, solve effectively that special high voltage direct current converter station exchanges side 500kV and 1100kV switching wave filter circuit breaker cut -offs the off -capacity, restrike and a difficult problem that electrical life is short.

Buccal lozenge containing extract of Chinese-medicinal material

A buccal lozenge containing the extracts of Chinese-medicinal amterials is prepared from 10 Chinese-medicinal materials including chrysanthemum flower 15-20 wt.%, pueraria root 15-20 wt%, black plum 5-10 wt%, Chinese olive 3-5 wt%, etc. through decocting in water, filtering, concentrating, adding lactose and granulated sugar, mixing, drying, breaking, adding flavouring, granulating and tabletting. Its advantages are high nutritive value and high effect on limiting absorption to alcohol and protecting liver, stomach and cardiac blood vessel.

Leadless thick film conductor slurry composition for aluminium nitride substrate

Plum berry homogeneous polysaccharide RCP-90-1, separation and purification method thereof and application of plum berry homogeneous polysaccharide RCP-90-1 as antitumor drug

The invention discloses a blueberry homogeneous polysaccharide RCP-90-1, a separation and purification method thereof and an application of the blueberry homogeneous polysaccharide RCP-90-1 as an antitumor drug, relates to a homogeneous polysaccharide and a separation and purification method and an application thereof, and aims to provide a novel blueberry homogeneous polysaccharide RCP-90-1 and a preparation method and an application thereof, and the novel blueberry homogeneous polysaccharide RCP-90-1 is a polysaccharide composed of arabinose, glucose, galactose, xylose, ribose and mannose. The preparation method comprises the following steps: extracting crude raspberry polysaccharide by adopting an ethanol-containing distilled water flash extraction method, deproteinizing, decoloring, carrying out alcohol precipitation by using 90% ethanol, eluting by using a 0.3 mol/L NaCl solution for DEAE-52 cellulose column chromatography, and finally purifying by using Sephadex G-100 column chromatography ...

Chinese medicinal composition for treating dementia, as well as preparation method, preparation and use thereof

The present invention provides a Chinese medicine composition for treating dementia. The Chinese medicine composition is composed of chuangxiong rhizome extract and gastrodia elata extract. The weight proportion of crude drug is 4:1. The preparing method provided by the invention adopts a resin technique in modern technique of Chinese medicine. A large quantity of impurities are removed and the content of active component is higher. The invention also provides a pharmaceutical preparation of the Chinese medicinal composition and the application in preparing medicine for preparing various dementia symptoms.

Process for producing aluminum nitride powders by self diffusion process at high temp.

Method for promoting sialon ceramic agglutinating densification

Power distribution network electric energy quality treatment system and method based on situation awareness

The invention discloses a situation awareness-based power distribution network power quality management system and method, and the method comprises the steps: obtaining the harmonic pollution of a novel source load injection power distribution network, extracting important characteristic quantities affecting the power quality, and predicting the harmonic voltage distortion rate of a load node through employing a support vector machine algorithm; a double-layer optimization model of the power distribution network and important users is established, the upper layer takes the maximum income of the power distribution network as the target, the influence of a network topology structure on the power quality treatment effect is considered, a treatment model of VDAPF on load nodes is established, and electricity prices of different power quality grades are formulated; and the lower layer establishes an electric energy quality purchasing strategy model according to the electricity prices of different ...

低成本α－赛隆粉体的自蔓延高温合成制备方法

The present invention is high-temperature self-spreading process of synthesizing alpha-Sialon powder at low cost and belongs to the field of the superfine non-oxide powder preparation. Metallic silicon, metallic aluminum powder, slag or some natural mineral or their mixture and Sialon powder in certain proportion are mixed and nitrogen in 3-15 MPa is led in to prepare alpha-Sialon powder. The said process features no need of pressing block in advance, reaction completed in a vertical annular or disc container of carbon felt, the addition of Sialon additive as crystal seed and diluent, low cost, low impurity content in the reaction system and loose combustion product.

Preparation method of tungsten carbide powder

The invention discloses a preparation method of tungsten carbide powder. The method comprises the following steps: A. mixing tungstate, magnesium powder and carbon powder at a mol ratio of 1-6:3-25:1-8, compacting and packing in a vertical annular cylinder or disc container which is made from carbon fiber felt, packing into a high pressure vessel for combustion synthesis in argon atmosphere, and naturally cooling; and B. taking out a combustion synthetic product for crushing, dipping in 1-10mol/L hydrochloric acid solution for 1-5h to fully dissolve a synthesis byproduct MgO impurity in the hydrochloric acid, filtering, washing with deionized water, repeating filtering and washing for a plurality of times till no Cl<-> is detected in filtrate with AgNO3, and drying the washed material in a drying oven at the temperature of 100-110 DEG C for 1-5h to obtain the final product tungsten carbide powder. The preparation method has the advantages of low raw material cost and simple process equipment ...

Application of 3-azido-N-(3-chloro-2-cyanophenyl)-2-methyl-2-(phenylseleno) propanamide in preparation of antitumor drugs

The invention belongs to the field of pharmacy, and particularly relates to a 3-azido-N-(3-chloro-2-cyanophenyl)-2-methyl-2-(phenylseleno) propanamide compound and application of the 3-azido-N-(3-chloro-2-cyanophenyl)-2-methyl-2-(phenylseleno) propanamide compound in preparation of antitumor drugs. The compound provided by the invention is prepared by a non-metal-catalyzed alkene azidation selenylation method, is a red liquid, and has a molecular formula of C17H14ClN5OSe.

用于轴承球的赛隆陶瓷材料及其制备方法

... 一种用于轴承球的赛隆(sialon)陶瓷及其制备方法，采用本发明的配方及特定的烧结工艺，得到的材料由25～45wt％的α-sialon相、β相Si#-[3]N#-[4]、B相(Y#-[2]SiAlO#-[5]N)，H相(Y#-[5](SiO#-[4])#-[3]N)，少量YAG相(3Y#-[2]O#-[3]・5Al#-[2]O#-[3])及玻璃相组成。采用三阶段保温烧结法，且在第二、第三阶段为防止高温分解，炉内氮气压力分别保持在0.15～0.22和1.0～5.0MPa范围。制备的轴承球压碎负荷不低于同尺寸轴承钢球的45％，维氏硬度大于16.5GPa。球抛光切面上气孔率(按体积比)为＜0.2％。 ...

Pharmaceutical composition for treating rheumatic arthritis

The invention provides pharmaceutical composition for treating rheumatic arthritis. The preparation method mainly comprises the following steps: cleaning Radix Aconiti Kusenzoffii, radix aconite, smoked plum, cassia twig, garden balsam stem, schizophragma integrifolium, prepared rehmannia root, honeysuckle, liquorice and obscured homalomena rhizome, decocting the materials for three times according to a conventional method by using water, merging the filtrate, and concentrating the filtrate to 1/3 volume, so that the medicine can be taken. The pharmaceutical composition is rapid and effective in treatment of the rheumatic arthritis, the rheumatic arthritis is difficult to reoccur, and the pharmaceutical composition is simple in formula, low in cost and easy to produce and is suitable for needs of most of patients suffering from rheumatic arthritis.

自蔓延高温合成氮化硅镁粉体的制备方法

The high temperature self-pervasion process of synthesizing silicon magnesium nitride powder belongs to the field of ceramic material preparation. Magnesium powder and silicon nitride powder in the molar ratio of 3.0-4.0 are mixed, small amount of halide additive may be added, and through the reaction in nitrogen or nitrogen plus hydrogen of 1-10 MPa, the silicon magnesium nitride powder is prepared. The production process needs no briquetting, and the reaction is performed in a ring or disc container of carbon felt. Compared with available technology, the high temperature self-pervasion synthesizing process of the present invention has the advantages of no environmental pollution, low power consumption, and being suitable for industrial production. The synthesized product has high purity and controlled oxygen content and may be used as the additive for ceramic material, electronic sealing material, etc.

Process for producing aluminum nitride powders by self diffusion process at high temperature

A process for preparing high-temp synthetic aluminium nitride powder features that Al and aluminium nitride powder are mixed in the ratio of 1-10:1-2, solid diluent (2-10 wt.%) that is ammonium salt (NH4F and NH4Cl) and AlF3 is added, and high-pressure nitrogen (5-15 MPa) is introduced to mix with liquid mixture. The reaction takes place in vertical cylindrical or disk container made of porous aluminium foil. Adding diluent can lower reaction and reduce oxygen content and impurities in reaction system.

Method for preparing superfine boron carbide powder

The invention discloses a method for preparing boron carbide powder, which comprises the following steps: A, mixing borate, magnesium powder and carbon powder according to a mol ratio of 1-10:6-70:1-10, compacting the mixture and putting the mixture into an upright annular cylinder or a discoid container made from carbon felts, putting the upright annular cylinder or the discoid container into a high-pressure vessel to perform combustion synthesis in an argon gas atmosphere, and cooling the mixture naturally after the combustion synthesis; and B, taking out the product subjected to the combustion synthesis, crushing the product, soaking the product in 1 to 10 mol/L hydrochloric acid solution for 1 to 5 hours, so that a synthesis byproduct MgO impurity is completely dissolved in the hydrochloric acid solution, performing suction filtration on the mixture, adding deionized water to wash the mixture, repeating the suction filtration and the washing for a plurality of times until no Cl is detected ...

Preparation method for the reaction sintering material of highly compact silicon nitride

Screening method of inonotus obliquus active action quality marker and construction and application of chemical characterization spectrum of inonotus obliquus active action quality marker

The invention relates to a screening method of an inonotus obliquus active action quality marker and construction and application of a chemical characterization map of the inonotus obliquus active action quality marker. The screening method comprises the following steps: (1) preparing the inonotus obliquus extract: preparing 95-30% alcohol extract of the inonotus obliquus, total triterpenes and 95% alcohol extract amp; a medicine residue aqueous extract and triterpene amp; a medicine residue water extract, a polysaccharide group and a 95% alcohol extract amp; a residue sugar group and triterpene amp; the extract comprises one or more of a sugar residue group, a water extract group and a polyphenol group; (2) constructing a chemical characterization spectrum: screening 10 polar parts on the premise of effectiveness, performing component analysis on each polar part by using UPLC-Q-TOF-MS, and performing data scanning in a positive ion mode and a negative ion mode respectively to obtain the ...

Early warning method and system for wellbore liquid accumulation of tight gas well

The invention relates to a tight gas well shaft liquid accumulation early warning method and system, and the method is characterized in that the method comprises the steps: carrying out the iterative calculation of the bottom hole flowing pressure of a to-be-measured tight gas well under different gas production rates according to the gas production rates and wellhead pressures of different tight gas wells; according to the actual dynamic data of the to-be-measured tight gas well, the formation pressure of the to-be-measured tight gas well at different moments is calculated; a specific pressure difference model is adopted, according to the well bottom flowing pressure of the tight gas well to be detected under the condition of different gas production rates and the formation pressure at different moments, the specific pressure difference of the well without liquid accumulation and the sudden change generated by the specific pressure difference of the liquid accumulation well are compared ...

Low-temp sintered aluminium nitride-base composition and its preparing process

A low-temp sintered AIN-base composition is prepared from AIN (50-80 wt%), lead borosilicate glass (15-50), and LiF (rest) through hot pressing and sinter, including heating and pressurizing by threestages, and holding temp at 950 or 1000 deg.C under 18-25 MPa for 2-8 hr. Its advantages include low sinter temp and density, high heat conductivity (11 W/m.k) and low cost.

Lucid ganoderma crusher with movable plate

According to the ganoderma lucidum crusher containing the movable plate, ganoderma lucidum is clamped through the clamping mechanism, meanwhile, the movable plate is rotated, the ganoderma lucidum is rotated into the first box body, meanwhile, a first electric push rod pushes a first motor and a brush disc to move towards the ganoderma lucidum, and the brush disc is driven by the first motor to brush spore powder; and meanwhile, the brushed spore powder is collected through a suction fan and a first collecting hopper and conveyed into a collecting box to be temporarily stored, so that the effect of brushing the spore powder is achieved, and the situation that the spore powder is wasted is avoided.

自蔓延高温合成氮化硅铁粉末的制备方法

... 一种自蔓延高温合成氮化硅铁粉末的制备方法，属于非氧化物超细粉末制备领域。本发明是由金属硅铁粉和氮化硅铁粉按1～10∶1～6的比例或硅铁粉、金属硅粉和氮化硅铁粉按1～10∶1～6∶1～6混合，加入添加剂并通以3～15MPa氮气。固体添加剂为铵盐(NH#-[4]Cl、NH#-[4]F或它们的混合剂)加入量为1-10wt％。本发明的特点是：不需要预先压块；反应是在碳毡制的直立环状筒和盘状容器中进行；外加的添加剂既有利于减缓反应速度，又可减少整个反应体系的杂质含量，而且促使燃烧产物结构疏松。 ...

Method for preparing high thermal conduction silicon nitride ceramic with magnesium silicon nitride as sintering aid

The present invention is process of preparing high heat conductivity and high strength Si3N4 ceramic with MgSiN2 as sintering assistant, and belongs to the field of non-oxide ceramic preparation. The high heat conductivity and high strength Si3N4 ceramic is prepared with alpha-Si3N4 powder and MgSiN2 powder in the mass ratio of 100 to 3-9, and through mixing, hot pressing sintering. During the preparation, the material is first formed at 2 MPa pressure, then filled into graphite mold and finally hot pressing sintered at 10-30 MPa and 1700-1800 deg.c for 1-20 hr. The high heat conductivity and high strength Si3N4 ceramic has heat conductivity up to 125 W/m.K and three-point breaking strength up to 800 MPa.

Preparation method of tungsten carbide powder

The invention discloses a preparation method of tungsten carbide powder. The method comprises the following steps: A. mixing tungstate, magnesium powder and carbon powder at a mol ratio of 1-6:3-25:1-8, compacting and packing in a vertical annular cylinder or disc container which is made from carbon fiber felt, packing into a high pressure vessel for combustion synthesis in argon atmosphere, and naturally cooling; and B. taking out a combustion synthetic product for crushing, dipping in 1-10mol/L hydrochloric acid solution for 1-5h to fully dissolve a synthesis byproduct MgO impurity in the hydrochloric acid, filtering, washing with deionized water, repeating filtering and washing for a plurality of times till no Cl<-> is detected in filtrate with AgNO3, and drying the washed material in a drying oven at the temperature of 100-110 DEG C for 1-5h to obtain the final product tungsten carbide powder. The preparation method has the advantages of low raw material cost and simple process equipment ...

Method for preparing superfine boron carbide powder

The invention discloses a method for preparing boron carbide powder, which comprises the following steps: A, mixing borate, magnesium powder and carbon powder according to a mol ratio of 1-10:6-70:1-10, compacting the mixture and putting the mixture into an upright annular cylinder or a discoid container made from carbon felts, putting the upright annular cylinder or the discoid container into a high-pressure vessel to perform combustion synthesis in an argon gas atmosphere, and cooling the mixture naturally after the combustion synthesis; and B, taking out the product subjected to the combustion synthesis, crushing the product, soaking the product in 1 to 10 mol/L hydrochloric acid solution for 1 to 5 hours, so that a synthesis byproduct MgO impurity is completely dissolved in the hydrochloric acid solution, performing suction filtration on the mixture, adding deionized water to wash the mixture, repeating the suction filtration and the washing for a plurality of times until no Cl<->is ...

Process for preparation of self-spread high-temp. synthesizing ferro-silicon nitride powder

A preparation method of self-spreading high-temp. synthetic silicon-iron nitride powder belongs to the field of non-oxide superfine powder preparation, and is characterized by that the metal silicon-iron powder and silicon-iron powder and silicon-iron nitride powder are mixed according to the ratio of 1-10:1-6, or silicon-iron powder, metal silicon powder and silicon-iron nitride powder are mixedaccording to the ratio of 1-10:1-6:1-6, then 1-10 Wt% of solid additive ammonium salt (NH4Cl or NH4F or their mixture) is added, and then the 3-15 MPa nitrogen gas is introduced. Said invention has no need of prebriquetting, and its reaction is implemented in vertical ring-shaped cylinder and disk-shaped container made of carbon felt, and its additive not only can slow down reaction speed, but also can reduce impurity content of whole reaction system, and can make the combustion product form loose structure.

Photovoltaic-thermal power dispatching method, recording medium and system for rural power grid area

The invention belongs to the technical field of distribution network dispatching, and discloses a rural power grid area photovoltaic-thermal power dispatching method, which aims at a specific rural power grid area, utilizes the electricity price response characteristics of rural power grid users and guides the rural power grid users to adjust power consumption behaviors through energy storage charging and discharging configuration, thereby systematically increasing the photovoltaic consumption of the rural power grid area and improving the power utilization efficiency of the rural power grid area. Carbon emission is reduced, and operation benefits are improved; according to the method, the particle swarm optimization is used for solving the model, the limitation of a traditional optimization method is overcome, and the optimization performance is improved. The invention further provides a non-transient readable recording medium storing the photovoltaic-thermal power dispatching program ...

一种低温烧结氮化铝基复相材料及其制备方法

... 一种低温烧结AlN基复相材料及其制备方法，涉及电子封装材料及其制造领域。其特征在于复相材料由AlN 50-80，硼硅酸铅玻璃50-15，余量为LiF(wt％)组成，硼硅酸铅玻璃的组成(wt％)SiO#-[2]：50-75，B#-[2]O#-[3]：3-17，PbO：15-29，含量为碱金属或碱土金属的氧化物。本发明采用热压烧结工艺，分三阶段升温、加压。最终保温阶段950℃或1000℃下，压力在18～25Mpa范围，保温2～8小时。热导率最高可达11W/m・K，比文献报道的高50％。本发明具有烧结温度低、密度低、导热性能良好和成本低廉等优点，适用于低温共烧基板材料和微电子封装材料。 ...

Sialon ceramic material for bearing ball and its preparation

Through specific formulation and sintering process, the present invention obtains a kind of material comprising Alpha-sialon phase and Beta-phase Si3N4, B phase Y2SiAlO3N, N phase Y5(SiO4)3N, small amount of YAG phase 3Y2PO3.5Al2O3, and glass phase. The present invention adopts a three-stage temperature-maintaining sintering process and in its second and third stages, nitrogen pressure inside thefurnace is maintained under 0.15-0.22 MPa and 1.0-5.0 MPa respectively to prevent high-temperature decomposition. Bearing ball produced with the said ceramic material has a crushing load not lower than 45% that of a steel bearing ball in the same size, a Vickers hardness greater than 16.5 GPa and a porosity in polished surface smaller than 0.25 (by volume ratio).