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    Barium titanate and production and process thereof
    1.
    发明授权
    Barium titanate and production and process thereof 有权
    钛酸钡及其制备及其工艺

    公开(公告)号：US07431911B2

    公开(公告)日：2008-10-07

    申请号：US10189371

    申请日：2002-07-03

    申请人： Akihiko Shirakawa ,  Hitoshi Yokouchi

    发明人： Akihiko Shirakawa ,  Hitoshi Yokouchi

    IPC分类号： C01G23/00 ,  H01G4/12 ,  C04B35/46

    CPC分类号： C04B35/63 ,  C01G23/006 ,  C01P2002/34 ,  C01P2002/77 ,  C01P2006/12 ,  C01P2006/40 ,  C04B35/4682 ,  C04B2235/3215 ,  C04B2235/44 ,  C04B2235/5409 ,  C04B2235/761 ,  H01G4/1227

    摘要： The present invention provides a barium titanate having a small particle size, containing small amounts of unwanted impurities, and exhibiting excellent electric characteristics, which can be employed for forming a dielectric ceramic thin film required for a small-sized capacitor which enables production of a small-sized electronic apparatus; and a process for producing the barium titanate. When a titanium oxide sol is reacted with a barium compound in an alkaline solution containing a basic compound, the basic compound is removed in the form of gas after completion of reaction, and the resultant reaction mixture is fired, a barium titanate having a large BET specific surface area and a high tetragonality content is produced.

    摘要翻译： 本发明提供了一种具有小量的不需要的杂质，具有优异的电特性的小粒径的钛酸钡，可用于形成小型电容器所需的电介质陶瓷薄膜，该小型电容器能够生产小型 尺寸电子设备; 和钛酸钡的制造方法。 当氧化钛溶胶与含有碱性化合物的碱性溶液中的钡化合物反应时，在反应完成后，以气体形式除去碱性化合物，并将所得反应混合物烧制，具有大的BET的钛酸钡 产生比表面积和高的四边形含量。

    Barium titanate and production and process thereof
    3.
    发明授权
    Barium titanate and production and process thereof 有权

    公开(公告)号：US07041269B2

    公开(公告)日：2006-05-09

    申请号：US10189371

    申请日：2002-07-03

    申请人： Akihiko Shirakawa ,  Hitoshi Yokouchi

    发明人： Akihiko Shirakawa ,  Hitoshi Yokouchi

    IPC分类号： C01G23/00 ,  H01G4/12 ,  C04B35/46

    摘要： The present invention provides a barium titanate having a small particle size, containing small amounts of unwanted impurities, and exhibiting excellent electric characteristics, which can be employed for forming a dielectric ceramic thin film required for a small-sized capacitor which enables production of a small-sized electronic apparatus; and a process for producing the barium titanate. When a titanium oxide sol is reacted with a barium compound in an alkaline solution containing a basic compound, the basic compound is removed in the form of gas after completion of reaction, and the resultant reaction mixture is fired, a barium titanate having a large BET specific surface area and a high tetragonality content is produced.

    Barium Titanate, Production Process Thereof and Capacitor
    5.
    发明申请
    Barium Titanate, Production Process Thereof and Capacitor 审中-公开
    钛酸钡，其生产工艺和电容器

    公开(公告)号：US20080145292A1

    公开(公告)日：2008-06-19

    申请号：US11661120

    申请日：2005-08-30

    申请人： Akihiko Shirakawa ,  Hitoshi Yokouchi

    发明人： Akihiko Shirakawa ,  Hitoshi Yokouchi

    IPC分类号： C01D1/02 ,  C01G23/04 ,  C01F17/00

    CPC分类号： C01G23/006 ,  C01P2002/34 ,  C01P2002/77 ,  C01P2006/10 ,  C01P2006/12 ,  C01P2006/40 ,  C04B35/4682 ,  C04B2235/3206 ,  C04B2235/3208 ,  C04B2235/3213 ,  C04B2235/3224 ,  C04B2235/3244 ,  C04B2235/3293 ,  C04B2235/3296 ,  C04B2235/3436 ,  C04B2235/761 ,  C04B2235/77 ,  C04B2235/79 ,  H01G4/1227

    摘要： The present invention provides a barium titanate having a small particle size, containing small amounts of unwanted impurities, and exhibiting excellent electric characteristics; and a process for producing the barium titanate.The perovskite-type barium titanate comprising at least one element selected from the group consisting of Sn, Zr, Ca, Sr, Pb, and the like, in an amount of 5 mol % or less (inclusive of 0 mol %) based on BaTiO3, wherein the molar ratio of A atom to B atom in the perovskite structure represented by ABX3 (A atom is surrounded with 12× atoms, and B atom is surrounded with 6× atoms) is from 1.001 to 1.025, and the specific surface area x (m2/g) and the ratio y of the c-axis length to the a-axis length of the crystal lattice as calculated by the Rietveld method satisfy the following formula. y>1.0083−6.53×10−7×x3 (wherein y=c-axis length/a-axis length, and 6.6≦x≦20).

    摘要翻译： 本发明提供一种具有小粒径的钛酸钡，含有少量不需要的杂质，具有优异的电特性; 和钛酸钡的制造方法。 包含选自Sn，Zr，Ca，Sr，Pb等中的至少一种元素的钙钛矿型钛酸钡，其量为5mol％以下（包括0mol％），基于BaTiO 其中由ABX 3代表的钙钛矿结构中的A原子与B原子的摩尔比（A原子被12x原子包围，B原子被6x包围） 原子）为1.001〜1.025，比表面积x（m≤2/ g）以及c轴长度相对于晶格的a轴长度的比y，由 Rietveld方法满足下列公式。 y> 1.0083-6.53×10-7×x3（其中y = c轴长/ a轴长度，6.6 <= x <= 20）。

    Titanium-containing perovskite composite oxide particle, production process thereof and capacitor
    9.
    发明申请
    Titanium-containing perovskite composite oxide particle, production process thereof and capacitor 审中-公开
    含钛钙钛矿复合氧化物颗粒，其制备方法和电容器

    公开(公告)号：US20060133988A1

    公开(公告)日：2006-06-22

    申请号：US11312460

    申请日：2005-12-21

    申请人： Tadatoshi Kurozumi ,  Hitoshi Yokouchi

    发明人： Tadatoshi Kurozumi ,  Hitoshi Yokouchi

    IPC分类号： C01G23/00

    CPC分类号： C01G23/003 ,  C01G25/006 ,  C01G27/006 ,  C01P2002/34 ,  C01P2006/12 ,  C01P2006/40 ,  H01G4/1218 ,  H01G4/30 ,  H01L37/025 ,  H01L41/187

    摘要： A titanium-containing perovskite composite oxide particle represented by the compositional formula: A(TixB(1−x))yO3 (provided that x and y each denoting a compositional ratio are 0≦x≦1 and 0.98≦y≦1.02, A is at least one or more element selected from Ca, Sr, Ba, Pb and Mg, and B is at least one or more element selected from Hf and Zr), wherein the specific surface area is from 1 to 100 m2/g, the average primary particle diameter D1 defined by formula (I) is from 10 to 1,000 nm, and the ratio D2/D1 of D1 to the average secondary particle diameter D2 is from 1 to 10: D1=6/ρS  (I)(wherein ρ is a density of the particle and S is a specific surface area).

    摘要翻译： 由以下组成式表示的含钛钙钛矿复合氧化物颗粒：A（Ti x x B（1-x））Y O （条件是每个表示组成比的x和y分别为0 <= x <= 1和0.98 <= y <= 1.02，A为至少一种或多种选自Ca，Sr，Ba， Pb和Mg，B是选自Hf和Zr中的至少一种以上的元素），其中比表面积为1〜100m 2 / g，平均一次粒径D 1 通式（I）为10〜1000nm，D 1与平均二次粒径D 2的比D 2 / D 1为1〜10：＆lt;线内式描述=“In-line 公式“end =”lead“？> D 1 = 6 / rhoS（I）<？in-line-formula description =”In-line Formulas“end =”tail“？>（其中rho是粒子的密度， S是比表面积）。