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Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Применить Всего найдено 17. Отображено 16.
26-12-2013 дата публикации

LAMINATED CERAMIC ELECTRONIC COMPONENT

Номер: US20130342956A1
Автор: HIROI Kazumichi, KONISHI Yukihiro, KOWASE Yusuke, MIZUNO Kotaro, Sato Ayumu
Принадлежит:

A laminated ceramic electronic component has electrode layers stacked with ceramic layers, where the thickness of each electrode layer is controlled to 0.5 μm or less and the average size of crystal grains constituting the electrode layer is controlled to 0.1 μm or less. The occurrence of structural defects in the laminated ceramic electronic component can be suppressed and high continuity of the electrode layers stacked with the ceramic layers is ensured. 10.1 μm or less.. A laminated ceramic electronic component having ceramic layers and electrode layers stacked with the ceramic layers , wherein a thickness of each electrode layer is 0.5 μm or less and an average size of crystal grains constituting the electrode layer is2. A laminated ceramic electronic component according to claim 1 , wherein a surface roughness based on a maximum height of an interface between each ceramic layer and each electrode layer is one-third the thickness of the electrode layer or less.3. A laminated ceramic electronic component according to claim 2 , wherein the thickness of the electrode layer is one-half the thickness of the ceramic layer or less.4. A laminated ceramic electronic component according to claim 1 , wherein the thickness of the electrode layer is 0.5 μm or less and 0.4 μm or more.5. A laminated ceramic electronic component according to claim 2 , wherein the thickness of the electrode layer is 0.5 μm or less and 0.4 μm or more.6. A laminated ceramic electronic component according to claim 3 , wherein the thickness of the electrode layer is 0.5 μm or less and 0.4 μm or more.7. A laminated ceramic electronic component according to claim 1 , wherein each electrode layer is comprised of continuous portions and discontinuous portions along an extending direction as viewed in a cross section claim 1 , wherein the total length of the continuous portions is more than 80% but less than 100% of the length of the electrode layer.8. A multilayer ceramic capacitor comprising ceramic ...

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Номер записи: 1
26-12-2013 дата публикации

DIELECTRIC CERAMIC, METHOD OF MANUFACTURING DIELECTRIC CERAMIC, AND MULTILAYER CERAMIC CAPACITOR

Номер: US20130342957A1
Автор: HIROI Kazumichi, KONISHI Yukihiro, KOWASE Yusuke, MIZUNO Kotaro, Sato Ayumu
Принадлежит:

A dielectric ceramic whose primary component is an ABOcompound (A contains Ba and B contains Ti) has a per-layer thickness of approx. 0.5 μm or less, where the volume ratio to all dielectric sintered grains of those whose grain size is in a range of 0.02 μm to 0.15 μm is adjusted to a grain size distribution of 1% to 10%. High dielectric constant and high reliability can be achieved at the same time with the dielectric ceramic. 1. A dielectric ceramic whose primary component is an ABOcompound (A contains Ba (barium) and B contains Ti (titanium)) and which is constituted by dielectric sintered grains , where a volume ratio to total dielectric sintered grains of those whose grain size is in a range of 0.02 μm to 0.15 μm is 1% to 10%.2. A dielectric ceramic according to claim 1 , wherein an average grain size of total sintered grains is in a range of 0.13 μm to 0.25 μm.3. A method of manufacturing a dielectric ceramic claim 1 , comprising:{'sub': '3', 'preparing dielectric green sheets by adding an auxiliary component of 0.1 μm or less in grain size to a material powder for primary component constituted by an ABOcompound (A contains Ba (barium) and B contains Ti (titanium)) and having a grain size of 0.05 μm to 0.12 μm; and'}sintering the dielectric green sheets so that a volume ratio to total dielectric sintered grains of those whose grain size is in a range of 0.02 μm to 0.15 μm becomes 1% to 10%.4. A method of manufacturing a dielectric ceramic according to claim 3 , wherein an average grain size of total sintered grains constituting the dielectric ceramic is in a range of 0.13 μm to 0.25 μm.5. A multilayer ceramic capacitor formed by alternately stacking dielectric layers constituted by dielectric sintered grains claim 3 , and electrode layers claim 3 , wherein:a thickness of each dielectric layer is 0.5 μm or less; and{'sub': '3', 'a primary component of the dielectric layer is an ABOcompound (A contains Ba (barium) and B contains Ti (titanium)) and a volume ratio ...

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Номер записи: 2
03-02-2022 дата публикации

Manufacturing method of ceramic powder

Номер: US20220037088A1
Автор: Chie Kawamura, Kazumichi HIROI, Osamu Hattori
Принадлежит: TAIYO YUDEN CO LTD

A manufacturing method of ceramic powder includes mixing a barium carbonate having a specific surface are of 15 m2/g or more, a titanium dioxide having a specific surface area of 20 m2/g or more, a first compound of a donor element having a larger valence than Ti, and a second compound of an acceptor element having a smaller valence than Ti and having a larger ion radium than Ti and the donor element, and synthesizing barium titanate powder by calcining the barium carbonate, the titanium dioxide, the first compound and the second compound until a specific surface area of the barium titanate powder becomes 4 m2/g or more and 25 m2/g or less.

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Номер записи: 3
07-02-2019 дата публикации

CERAMIC POWDER

Номер: US20190043668A1
Автор: HATTORI Osamu, HIROI Kazumichi, KAWAMURA Chie
Принадлежит:

Ceramic powder includes: barium titanate as a main component, wherein: a donor element having a larger valence than Ti is solid-solved in the barium titanate; an acceptor element having a smaller valence than Ti and larger ion radius than Ti and the donor element is solid-solved in the barium titanate, a solid solution amount of the donor element with respect to the barium titanate is 0.05 mol or more and 0.3 mol or less; a solid solution amount of the accepter element with respect to the barium titanate is 0.02 mol or more and 0.2 mol or less; and relationships y≥−0.0003x+1.0106, y≤−0.0002x+1.0114, 4≤x≤25 and y≤1.0099 are satisfied when a specific surface area of the ceramic powder is “x” and an axial ratio c/a of the ceramic powder is “y”. 1. Ceramic powder comprising:barium titanate as a main component,wherein:a donor element having a larger valence than Ti is solid-solved in the barium titanate;an acceptor element having a smaller valence than Ti and larger ion radius than Ti and the donor element is solid-solved in the barium titanate,a solid solution amount of the donor element with respect to the barium titanate is 0.05 mol or more and 0.3 mol or less on a presumption that an amount of the barium titanate is 100 mol and the donor element is converted into an oxide;a solid solution amount of the accepter element with respect to the barium titanate is 0.02 mol or more and 0.2 mol or less on a presumption that the amount of the barium titanate is 100 mol and the acceptor element is converted into an oxide; andrelationships y≥−0.0003x+1.0106, y≤−0.0002x+1.0114, 4≤x≤25 and y≤1.0099 are satisfied when a specific surface area of the ceramic powder is “x” and an axial ratio c/a of the ceramic powder is “y”.2. The ceramic powder as claimed in claim 1 , wherein the donor element is at least one of Mo and W.3. The ceramic powder as claimed in claim 1 , wherein the acceptor element is Mn. This application is a continuation of application Ser. No. 15/623,253, filed Jun. ...

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Номер записи: 4
01-06-2017 дата публикации

Dielectric material for multilayer ceramic capacitor, and multilayer ceramic capacitor

Номер: US20170152187A1
Автор: Chie Kawamura, Kazumichi HIROI, Kunihiko Nagaoka, Minoru Ryu
Принадлежит: TAIYO YUDEN CO LTD

Dielectric layers are prepared using a dielectric material that contains a ceramic powder having Ba, Ti, and additive element X which is solid-solubilized and is at least one element selected from the group consisting of Mo, Ta, Nb, and W, wherein the standard deviation of the ratio of the peak intensity of the additive element X (XKα) measured by STEM-EDX, and the sum of the peak intensity of the Ti and peak intensity of the Ba (BaLα+TiKα) measured by STEM-EDX, is less than 10.5% of the average ratio as measured at a total of five points including the three points that divide the maximum diameter of one grain of the ceramic powder into four equal parts, and two excluding the center point of the three points that divide the diameter crossing at right angles with the maximum diameter at its center point, into four equal parts.

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Номер записи: 5
28-07-2016 дата публикации

MULTILAYER CERAMIC CAPACITOR

Номер: US20160217924A1
Автор: HIROI Kazumichi, IWAZAKI Yoshiki, KAWAMURA Chie, Morita Koichiro, Ryu Minoru, TANIGUCHI Katsuya
Принадлежит:

A multilayer ceramic capacitor has a laminate comprising dielectric layers stacked alternately with internal electrode layers of different polarities, wherein: the dielectric layers contain ceramic grains whose primary component is BaTiO; the ceramic grains contain at least one type of donor element (D) selected from the group that includes Nb, Mo, Ta, and W, and at least one type of acceptor element (A) selected from the group that includes Mg and Mn; and the ratio of the concentration of the donor element (D) and that of the acceptor element (A) (D/A) is greater than 1 at the center parts of the ceramic grains, while the D/A ratio is less than 1 at the outer edge parts of the ceramic grains (if A=0, then D/A=∞ and D=A=0 never occurs). 1. A multilayer ceramic capacitor having a laminate comprising dielectric layers stacked alternately with internal electrode layers of different polarities , wherein:{'sub': '3', 'the dielectric layers contain ceramic grains whose primary component is BaTiO;'}the ceramic grains contain at least one type of donor element (D) selected from a group that includes Nb, Mo, Ta, and W, and at least one type of acceptor element (A) selected from a group that includes Mg and Mn; anda ratio of a concentration of the donor element (D) and that of the acceptor element (A) (D/A) is greater than 1 at center parts of the ceramic grains, while the D/A ratio is less than 1 at outer edge parts of the ceramic grains (if A=0, then D/A=∞ and D=A=0 never occurs).2. A multilayer ceramic capacitor according to claim 1 , wherein the concentration of the donor element (D) in the dielectric layers is 0.05 to 0. 3 mol relative to 100 mol of BaTiO.3. A multilayer ceramic capacitor according to claim 1 , wherein the concentration of the acceptor element (A) in the dielectric layers is greater than 0.3 mol but less than 2.0 mol relative to 100 mol of BaTiO.4. A multilayer ceramic capacitor according to claim 2 , wherein the concentration of the acceptor element (A) ...

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Номер записи: 6
10-09-2020 дата публикации

MANUFACTURING METHOD OF CERAMIC POWDER

Номер: US20200286684A1
Автор: HATTORI Osamu, HIROI Kazumichi, KAWAMURA Chie
Принадлежит:

A manufacturing method of ceramic powder includes: synthesizing barium titanate powder from barium carbonate, titanium dioxide, manganese carbonate, and one of ammonium molybdate and tungsten oxide, wherein: a solid solution amount of the donor element is 0.05 mol or more and 0.3 mol or less; a solid solution amount of the accepter element with respect to the barium titanate is 0.02 mol or more and 0.2 mol or less on a presumption that the amount of the barium titanate is 100 mol and the acceptor element is converted into an oxide; and relationships y≥−0.0003x+1.0106, y≤−0.0002x+1.0114, 4≤x≤25 and y≤1.0099 are satisfied when a specific surface area of the ceramic powder is “x” and an axial ratio c/a of the ceramic powder is “y”. 1. A manufacturing method of ceramic powder comprising:{'sub': 4', '6', '7', '24', '2', '3, 'synthesizing barium titanate powder from barium carbonate, titanium dioxide, manganese carbonate, and one of ammonium molybdate {(NH)MoO.4HO} and tungsten oxide (WO),'}wherein:{'sup': 2', '2, 'a specific surface area of the barium carbonate is 15 m/g or more before the synthesizing, and a specific surface area of the titanium dioxide is 20 m/g or more before the synthesizing;'}Mo or W acting as a donor element is solid-solved in the barium titanate powder after the synthesizing, and Mn acting as an acceptor element is solid-solved in the barium titanate powder after the synthesizing;{'sup': 2', '2, 'a specific surface are of the barium tianate powder after the synthesizing is 4 m/g or more 25 m/g or less;'}a transition peak temperature between a tetragonal and a cubic at 120 degrees C. of the barium titanate powder after the synthesizing is shifted toward low temperature side by 1 degrees C. or more, compared to another barium titanate in which none of the donor element and the acceptor element are solid-solved;a solid solution amount of the donor element with respect to the barium titanate is 0.05 mol or more and 0.3 mol or less on a presumption ...

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Номер записи: 7
28-12-2017 дата публикации

MULTILAYER CERAMIC CAPACITOR, CERAMIC POWDER, MANUFACTURING METHOD OF MULTILAYER CERAMIC CAPACITOR AND MANUFACTURING METHOD OF CERAMIC POWDER

Номер: US20170372841A1
Автор: HATTORI Osamu, HIROI Kazumichi, KAWAMURA Chie
Принадлежит:

A multilayer ceramic capacitor includes: a multilayer structure in which ceramic dielectric layers and internal electrode layers are alternately stacked, wherein: a main component of the ceramic dielectric layer is barium titanate in which a donor element having a larger valence than Ti is solid-solved and an acceptor element having a smaller valence than Ti and larger ion radius than Ti and the donor element is solid-solved; a solid-solution amount of the donor element is 0.05 mol or more and 0.3 mol or less on a presumption that an amount of the barium titanate is 100 mol and the donor element is converted into an oxide; and a solid solution amount of the accepter element is 0.02 mol or more and 0.2 mol or less on a presumption that the amount of the barium titanate is 100 mol and the acceptor element is converted into an oxide. 1. A multilayer ceramic capacitor comprising:a multilayer structure in which ceramic dielectric layers and internal electrode layers are alternately stacked,wherein:a main component of the ceramic dielectric layer is barium titanate in which a donor element having a larger valence than Ti is solid-solved and an acceptor element having a smaller valence than Ti and larger ion radius than Ti and the donor element is solid-solved;a solid-solution amount of the donor element with respect to the barium titanate is 0.05 mol or more and 0.3 mol or less on a presumption that an amount of the barium titanate is 100 mol and the donor element is converted into an oxide; anda solid solution amount of the accepter element with respect to the barium titanate is 0.02 mol or more and 0.2 mol or less on a presumption that the amount of the barium titanate is 100 mol and the acceptor element is converted into an oxide.2. The multilayer ceramic capacitor as claimed in claim 1 , wherein the donor element is at least one of Mo and W.3. The multilayer ceramic capacitor as claimed in claim 1 , wherein the acceptor element is Mn.4. Ceramic powder comprising: ...

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Номер записи: 8
12-09-2023 дата публикации

Manufacturing method of ceramic powder

Номер: US11756736B2
Автор: Chie Kawamura, Kazumichi HIROI, Osamu Hattori
Принадлежит: TAIYO YUDEN CO LTD

A manufacturing method of ceramic powder includes mixing a barium carbonate having a specific surface are of 15 m 2 /g or more, a titanium dioxide having a specific surface area of 20 m 2 /g or more, a first compound of a donor element having a larger valence than Ti, and a second compound of an acceptor element having a smaller valence than Ti and having a larger ion radium than Ti and the donor element, and synthesizing barium titanate powder by calcining the barium carbonate, the titanium dioxide, the first compound and the second compound until a specific surface area of the barium titanate powder becomes 4 m 2 /g or more and 25 m 2 /g or less.

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Номер записи: 9
20-09-2023 дата публикации

積層セラミック電子部品

Номер: JP2023129774A
Автор: Hirokazu Shimizu, Kazumichi HIROI, Norihiro Arai, 一路 広井, 紀宏 新井, 裕千 清水
Принадлежит: TAIYO YUDEN CO LTD

【課題】高い信頼性を有する積層セラミック電子部品を提供する。【解決手段】積層セラミック電子部品は、セラミック素体と、第１及び第２外部電極と、を具備する。セラミック素体は、内部電極が積層された電極積層部と、電極積層部を挟んで第１軸方向に対向する第１及び第２カバー部と、を有する。第１及び第２外部電極は、セラミック素体を第２軸方向から覆う被覆部と、カバー部上を第２軸方向に沿って延在する延在部と、をそれぞれ有する。セラミック素体は、セラミックスの結晶粒と、結晶粒の間に位置する偏析粒子と、を含む。延在部と電極積層部との間に位置するカバー部の端部領域の断面において、偏析粒子のうち結晶粒の平均粒径の０．５％以上１０％以下の粒径を有する小粒子の数が、結晶粒の数の４０％以上９５％以下である。【選択図】図４

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Номер записи: 10
04-06-2024 дата публикации

Ceramic electronic device and manufacturing method of the same

Номер: US12002625B2
Автор: Kazumichi HIROI, Yasuyuki Inomata
Принадлежит: TAIYO YUDEN CO LTD

A ceramic electronic device includes a multilayer structure in which a plurality of dielectric layers and a plurality of internal electrode layers are alternately stacked. Each of the plurality of dielectric layers includes ceramic grains of a main component thereof expressed by (Ba 1-x-y Ca x Sr y )(Ti 1-z Zr z )O 3 (0<x≤0.2, 0≤y≤0.1, 0≤z≤0.1). D3<D1<D2 is satisfied when an average grain diameter of the ceramic grains of the main component of the plurality of dielectric layers in a section in which each two internal electrode layers is D1, an average grain diameter of the ceramic grains of the main component of first dielectric layers which are located at different height positions from the internal electrode layers is D2, an average grain diameter of the ceramic grains of the main component of second dielectric layers which are located at same height positions of the internal electrode layers is D3.

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Номер записи: 11
07-09-2023 дата публикации

Multilayer ceramic electronic component

Номер: US20230282423A1
Автор: Hirokazu Shimizu, Kazumichi HIROI, Norihiro Arai
Принадлежит: TAIYO YUDEN CO LTD

A multilayer ceramic electronic component includes a ceramic body, which includes an electrode-stacking portion in which internal electrodes are stacked, and cover portions facing each other in a first axis direction across the electrode-stacking portion, and external electrodes each including a covering portion that covers the ceramic body from a second axis direction, and an extending portion that extends over the cover portions along the second axis direction. The ceramic body includes crystal grains of ceramic and segregated small grains located between the crystal grains. In a cross section of an end section located between the extending portion of the cover portion and the electrode-stacking portion, the number of the segregated small grains having a grain size of 0.5% or greater and 10% or less of an average grain size of the crystal grains is 40% or greater and 95% or less of the number of the crystal grains.

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Номер записи: 12
06-02-2020 дата публикации

誘電体材料の製造方法および積層セラミックコンデンサの製造方法

Номер: JP2020019673A
Автор: Katsuya Taniguchi, Kazumichi HIROI, Shinichi Abe, Takeshi Sogabe, Takuma Bando, 一路 広井, 克哉 谷口, 剛 曽我部, 琢磨 坂東
Принадлежит: TAIYO YUDEN CO LTD

【課題】 添加物を十分に固溶させ、添加物の固溶状態の均一化を図ることができる誘電体材料の製造方法および積層セラミックコンデンサの製造方法を提供する。【解決手段】 誘電体材料の製造方法は、主添加物と反応したＴｉＯ２を用意する工程と、前記主添加物と反応したＴｉＯ２の粉末とＢａ材料とを混合し、７００℃〜１１００℃の範囲で仮焼を行う工程と、を含む。【選択図】 図６

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Номер записи: 13
16-03-2023 дата публикации

Ceramic electronic device and manufacturing method of the same

Номер: US20230081197A1
Автор: Kazumichi HIROI, Yasuyuki Inomata
Принадлежит: TAIYO YUDEN CO LTD

A ceramic electronic device includes a multilayer structure in which a plurality of dielectric layers and a plurality of internal electrode layers are alternately stacked. Each of the plurality of dielectric layers includes ceramic grains of a main component thereof expressed by (Ba1−x−yCaxSry)(Ti1−zZrz)O3 (0<x≤0.2, 0≤y≤0.1, 0≤z≤0.1). D3<D1<D2 is satisfied when an average grain diameter of the ceramic grains of the main component of the plurality of dielectric layers in a section in which each two internal electrode layers is D1, an average grain diameter of the ceramic grains of the main component of first dielectric layers which are located at different height positions from the internal electrode layers is D2, an average grain diameter of the ceramic grains of the main component of second dielectric layers which are located at same height positions of the internal electrode layers is D3.

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Номер записи: 14
20-03-2018 дата публикации

Dielectric material for multilayer ceramic capacitor, and multilayer ceramic capacitor

Номер: US09919970B2
Автор: Chie Kawamura, Kazumichi HIROI, Kunihiko Nagaoka, Minoru Ryu
Принадлежит: TAIYO YUDEN CO LTD

Dielectric layers are prepared using a dielectric material that contains a ceramic powder having Ba, Ti, and additive element X which is solid-solubilized and is at least one element selected from the group consisting of Mo, Ta, Nb, and W, wherein the standard deviation of the ratio of the peak intensity of the additive element X (XKα) measured by STEM-EDX, and the sum of the peak intensity of the Ti and peak intensity of the Ba (BaLα+TiKα) measured by STEM-EDX, is less than 10.5% of the average ratio as measured at a total of five points including the three points that divide the maximum diameter of one grain of the ceramic powder into four equal parts, and two excluding the center point of the three points that divide the diameter crossing at right angles with the maximum diameter at its center point, into four equal parts.

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Номер записи: 15
30-05-2017 дата публикации

Multilayer ceramic capacitor

Номер: US09666371B2
Автор: Chie Kawamura, Katsuya Taniguchi, Kazumichi HIROI, Koichiro Morita, Minoru Ryu, Yoshiki Iwazaki
Принадлежит: TAIYO YUDEN CO LTD

A multilayer ceramic capacitor has a laminate comprising dielectric layers stacked alternately with internal electrode layers of different polarities, wherein: the dielectric layers contain ceramic grains whose primary component is BaTiO 3 ; the ceramic grains contain at least one type of donor element (D) selected from the group that includes Nb, Mo, Ta, and W, and at least one type of acceptor element (A) selected from the group that includes Mg and Mn; and the ratio of the concentration of the donor element (D) and that of the acceptor element (A) (D/A) is greater than 1 at the center parts of the ceramic grains, while the D/A ratio is less than 1 at the outer edge parts of the ceramic grains (if A=0, then D/A=∞ and D=A=0 never occurs).

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Номер записи: 16