Method for producing magnesia whisker using magnesite

This invention relates to a kind of MgO-whisker-producing method using magnesia. This invention chooses magnesia serum fluid and soluble carbonate as crude materials to firstly get the predecessor. After processing heating-up calcinations, we will get the MgO whisker. The whisker has good fire-resisting property, insulativity, heat conductivity, durability and reinforcement and flexibility, which can be used as the modifier and fire retardant of complex material and the plasticizing and reinforcing agent of unsaturated polyester. This technology is easy to go and it costs little. At the same time, it has no defects of the existing methods such as big costs and sophisticated techniques, and the MgO whisker has good dispersity and high purity, so it offers ease to realize commercial process.

Method for preparing fan shaped magnesia crystal whisker

The present invention belongs to the field of inorganic non-metal material preparing technology, and is the method of producing fan-shaped magnesia crystal whisker. The method includes first preparation of precursor with magnesite slurry and hydrogen peroxide as material and subsequent programmed heating and calcining to obtain the fan-shaped magnesia crystal whisker. The method is simple and feasible, and the prepared crystal whisker has relatively high physical performance and mechanical performance. The prepared crystal whisker may be used as reinforcing agent, fireproof agent, paint adhesive, filtering material, assistant, etc. in automobile manufacture, electronic and electric industry, mechanical industry, chemical industry and other fields.

Method for preparing high length-diameter ratio magnesia whisker

This invention belongs to the producing field of inorganic non-metal material, referring to the producing method of a kind of high slenderness ratio MgO whisker. This invention chooses soluble magnesium salts and soluble carbonate as crude materials to firstly get MgCO3 predecessor. After processing heating-up calcinations, we will get the MgO whisker. This method is easy, and the product costs little. The product's diameter is 2-5 mum, and its length is 30-50mum, while the whisker has high physical and mechanical nature. It can be used as the enhancer and fire retardant of plastics and the binder of covering material. It is good filter material and assistant, which can be widely used in the fields of cars, electronics and electricity, mechanics, chemical industry and architecture. This method has no defects of the existing methods such as big costs and sophisticated techniques, and the MgO whisker has good dispersity and high purity, so it offers ease to realize commercial process.

Hydro-thermal treatment method capable of improving performance of chalcogen semiconductor film

The invention relates to a treatment method capable of improving the performance of a chalcogen semiconductor film prepared by a soft chemical method, in particular to a treatment method of carrying out hydro-thermal treatment in a sulfide or ion aqueous solution to improve the performance of the chalcogen semiconductor film prepared by the soft chemical method. The method comprises the followingsteps: firstly, preparing the 0.01M to 0.3M sulfide or ion aqueous solution; then, pouring the solution into a hydro-thermal reactor and putting the chalcogen semiconductor film precipitated by soft chemical methods such as a chemical-bath method, continuous ion sheath absorption reaction method or an electric-precipitation method into the solution; and finally, carrying out the hydro-thermal treatment to the chalcogen semiconductor film at 160 DEG C to 240 DEG C. Compared with the prior method of thermally treating the film in an H2S atmosphere, an H2Se atmosphere, an inertia atmosphere or vacuum ...

High-reliability anti-radiation SONOS memory and preparation method thereof

The invention discloses a high-reliability anti-radiation SONOS (Silicon Oxide Nitride Oxide Semiconductor) memory and a preparation method thereof, and relates to the field of silicon microelectronics. A gate dielectric layer of the input/output MOS and the selection tube is adjusted from a SiO2 single-gate dielectric layer to an HTO/SiO2 composite gate dielectric layer, the movable charge and the fixed charge of the HTO/SiO2 composite gate dielectric layer are less than those of the SiO2 single-gate dielectric layer, and the input/output MOS and the selection tube show better total dose radiation resistance. The defect lines of the HTO layer and the SiO2 layer in the HTO/SiO2 composite gate dielectric layer are arranged in a staggered manner, so that an electric leakage path of the composite gate from the upper surface of the HTO to the lower surface of the SiO2 is avoided, the early failure of an input/output MOS (Metal Oxide Semiconductor) and a selection tube can be reduced, and the ...

Universal synthesis method for porous hollow metallic oxide

The invention belongs to to the field of the preparation of inorganic non-metallic material, more particularly relates to a common method for synthesizing hollow metal oxide with high porosity. The method of the invention adopts soluble transition metal nitrate (MNO3, M is equal to Cu, Ni, Co), soluble sulfur source (thiourea) and selenium source (sodium selenite, Na2SeO3) as raw materials; metal sulfides (CuS, Cu2S, NiS, CoS) and the precursor of a selenide (CuSe) are first prepared and then treated with temperature programming and high temperature oxidation to obtain a corresponding porous metal oxide hollow framework (CuO, NiO and Co3O4). The method of the invention overcomes the defects such as high cost of material and production and complex process, etc., in the prior preparation method and the prepared metal oxides has large specific surface area, high thermal stability and good dispersity without need of being added with costly macromolecular organic templates and is easy to achieve ...

Chlorine-free highly effective composite enhanced solid cement grinding aids and production method

The invention provides a chlorine-free high-efficiency composite reinforcing type solid cement grinding aid and production method, the grinding aid is composed of inorganic substrate material, organic material and water, strong antifreeze and antirust; the inorganic substrate material is composed of powder coal ash, sodium carbonate and sodium silicate, the mixing solution of any three or four among triethanolamine, glycol, propanediol, glycerolor paper pulp waste liquid is selected as the organic material, the inorganic strong antifreeze is composed of aluminum sulfate, calces or sodium hydrogen, sodium acetate or carbamide, and the antirust is sodium dihydrogen phosphate. The production method is the following: first the inorganic strong antifreeze is utilized to perform the complexation and modification of the organic material solution, and then the obtained mixing solution and the inorganic substrate material are furthermore compounded, reacted, blended and crushed. The invention has ...

Aluminum oxide-activated carbon composite carrier, preparation method and prepared catalyst

The invention discloses an aluminum oxide-activated carbon composite carrier, a preparation method and a prepared catalyst. The carrier is characterized by having a specific surface area of 70 to 300 m<2>/g, a most probable pore diameter of 3 to 25 nm and the side compression strength of 80 to 200 N/mm; the activated carbon content of the carrier is 10 to 30 mass percent, while aluminum oxide content is 70 to 90 mass percent; and the carrier is prepared by kneading, molding and calcining aluminum oxide, activated carbon and an auxiliary material. The hydrogenation and desulfurization catalystis prepared by loading Ni-Mo or Co-Mo or Ni-W onto the carrier by an impregnation method. The carrier of the invention has a well-developed mesopore structure and high mechanical strength. The catalyst of the invention has hydrogenation and desulfurization activity higher than that of the catalyst prepared by taking the aluminum oxide and the activated carbon independently as the carriers.

Controllable preparation method of orthorhombic-phase rhombohedral-phase sodium niobate having high Curie point

The invention belongs to the field of preparing inorganic functional materials, in particular relates to a preparing process for controlled systemization of rhombohedral phase sodium niobate powders and orthorhombic sodium niobate powders in the micro-growing environment which is adjusted by dentate organic amine under hydrothermal condition. The method comprises steps of employing the most common niobium pentoxide and sodium hydroxide as raw materials, adjusting the mole ratio of the niobium pentoxide to the sodium hydroxide and systemizing the rhombohedral phase sodium niobate and the orthorhombic sodium niobate in hydrothermal reaction system of adding the organic amine. The method has the advantages that the process is simple and convenient in operation and low in preparing cost, the prepared products are uniform in morphology and good in dispersity. The prepared rhombohedral phase sodium niobate is better in thermal stability, higher in Curie temperature and sound in ferroelectric ...

Hydro-thermal treatment method capable of improving performance of chalcogen semiconductor film

The invention relates to a treatment method capable of improving the performance of a chalcogen semiconductor film prepared by a soft chemical method, in particular to a treatment method of carrying out hydro-thermal treatment in a sulfide or ion aqueous solution to improve the performance of the chalcogen semiconductor film prepared by the soft chemical method. The method comprises the following steps: firstly, preparing the 0.01M to 0.3M sulfide or ion aqueous solution; then, pouring the solution into a hydro-thermal reactor and putting the chalcogen semiconductor film precipitated by soft chemical methods such as a chemical-bath method, continuous ion sheath absorption reaction method or an electric-precipitation method into the solution; and finally, carrying out the hydro-thermal treatment to the chalcogen semiconductor film at 160 DEG C to 240 DEG C. Compared with the prior method of thermally treating the film in an H2S atmosphere, an H2Se atmosphere, an inertia atmosphere or vacuum ...

Universal synthesis method for porous hollow metallic oxide

The invention belongs to to the field of the preparation of inorganic non-metallic material, more particularly relates to a common method for synthesizing hollow metal oxide with high porosity. The method of the invention adopts soluble transition metal nitrate (MNO3, M is equal to Cu, Ni, Co), soluble sulfur source (thiourea) and selenium source (sodium selenite, Na2SeO3) as raw materials; metalsulfides (CuS, Cu2S, NiS, CoS) and the precursor of a selenide (CuSe) are first prepared and then treated with temperature programming and high temperature oxidation to obtain a corresponding porous metal oxide hollow framework (CuO, NiO and Co3O4). The method of the invention overcomes the defects such as high cost of material and production and complex process, etc., in the prior preparation method and the prepared metal oxides has large specific surface area, high thermal stability and good dispersity without need of being added with costly macromolecular organic templates and is easy to achieve ...

Preparation method of photocatalyst for removing antimony from modified carbon-based loaded organic photovoltaic material

The invention discloses a preparation method of a photocatalyst for removing antimony from a modified carbon-based loaded organic photovoltaic material. The preparation method comprises the following operation steps: A, crushing a carbon material; b, mixing carbon powder with deionized water; c, adding a cross-linking agent epichlorohydrin (ECH) into the mixed solution in the step B; d, in an ice bath environment, adding an amino-rich material into the mixed solution obtained in the step C, and stirring to react for 1 hour; e, filtering, washing and drying the solution after the reaction in the step D to obtain a modified carbon-based material; f, mixing the organic photovoltaic material with chloroform; and G, uniformly coating the modified carbon-based material with the mixed solution obtained in the step F, and drying to obtain the antimony-removing photocatalyst for the modified carbon-based loaded organic photovoltaic material. The photocatalyst obtained through the method can efficiently ...

Chlorine-free highly effective composite enhanced solid cement grinding aids and production method

The invention provides a chlorine-free high-efficiency composite reinforcing type solid cement grinding aid and production method, the grinding aid is composed of inorganic substrate material, organic material and water, strong antifreeze and antirust; the inorganic substrate material is composed of powder coal ash, sodium carbonate and sodium silicate, the mixing solution of any three or four among triethanolamine, glycol, propanediol, glycerolor paper pulp waste liquid is selected as the organic material, the inorganic strong antifreeze is composed of aluminum sulfate, calces or sodium hydrogen, sodium acetate or carbamide, and the antirust is sodium dihydrogen phosphate. The production method is the following: first the inorganic strong antifreeze is utilized to perform the complexation and modification of the organic material solution, and then the obtained mixing solution and the inorganic substrate material are furthermore compounded, reacted, blended and crushed. The invention has ...

Aluminum oxide-activated carbon composite carrier, preparation method and prepared catalyst

The invention discloses an aluminum oxide-activated carbon composite carrier, a preparation method and a prepared catalyst. The carrier is characterized by having a specific surface area of 70 to 300 m<2>/g, a most probable pore diameter of 3 to 25 nm and the side compression strength of 80 to 200 N/mm; the activated carbon content of the carrier is 10 to 30 mass percent, while aluminum oxide content is 70 to 90 mass percent; and the carrier is prepared by kneading, molding and calcining aluminum oxide, activated carbon and an auxiliary material. The hydrogenation and desulfurization catalyst is prepared by loading Ni-Mo or Co-Mo or Ni-W onto the carrier by an impregnation method. The carrier of the invention has a well-developed mesopore structure and high mechanical strength. The catalyst of the invention has hydrogenation and desulfurization activity higher than that of the catalyst prepared by taking the aluminum oxide and the activated carbon independently as the carriers.

Liquid high-efficiency cement grinding aid reinforcing agent and producing method thereof

The invention relates to a liquid cement grinding-assisting reinforcing agent and a production method thereof, particularly to a high-efficient liquid compound non-chlorinated and low alkali cement grinding-assisting reinforcing agent of a defoaming mechanism and cement stability performance and a production method thereof. Pulp waste liquid is used as main material which is in complexation with triethanolamine and polyol and added with small amount of stabilizers of phosphogypsum and aluminum sulfate, etc., to eliminate the harm of free state CaO, and ethal etc. is added to play a role of defoaming, thereby the stability and density of the cement is enhanced and the intensity of the cement is further enhanced. The production method is to separate grinding-assisting reinforcing ingredient and additive ingredient respectively and averagely which are then stirred and mixed. In addition to simple technique and low price, the product is easy for storage and transportation, which occupies little ...

Liquid cement grinding aid reinforcing agent and producing method thereof

Hybridization material of Nano fiber of titanium oxide / polyaniline, and preparation method