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    Dielectric ceramic composition and ceramic electronic part with same
    1.
    发明授权
    Dielectric ceramic composition and ceramic electronic part with same 失效
    介电陶瓷组合物与陶瓷电子部件相同

    公开(公告)号：US5994253A

    公开(公告)日：1999-11-30

    申请号：US110417

    申请日：1998-07-06

    申请人： Nobuhiro Sasaki ,  Katsuyuki Horie ,  Hirokazu Chazono

    发明人： Nobuhiro Sasaki ,  Katsuyuki Horie ,  Hirokazu Chazono

    IPC分类号： C04B35/00 ,  C04B35/46 ,  C04B35/468 ,  H01B3/12 ,  H01G4/12

    CPC分类号： C04B35/4686 ,  C04B35/4688 ,  H01G4/1227

    摘要： A dielectric ceramic composition is comprised of a crystal structure phase of a tungsten bronze form, one titanate-barium phase or more titanate-barium phases selected from Ba.sub.2 Ti.sub.9 O.sub.20, BaTi.sub.2 O.sub.5, BaTi.sub.4 O.sub.9 and Ba.sub.4 Ti.sub.13 O.sub.30, and a fine crystal phase comprising an oxide of each of at least B, Ag and Mn, in which the crystal structure phase of the tungsten bronze form is formed with a limited amount of a compound oxide of Ba, Nd and Ti as a basic component and contains a limited amount of each of an oxide of at least Bi, Pb, Zn and Si. The dielectric ceramic composition can be fired at a temperature of 920.degree. C. or lower and sintered forming into a ceramic electronic part which has remarkably high dielectric characteristics, such as the dielectric constant of 60 or higher, the Q factor of 1,000 or higher, and the temperature coefficient .tau..epsilon.r of the relative dielectric constant .epsilon.r of .+-.60 ppm/.degree. C. or smaller. The ceramic electronic parts for high frequency are further provided with high electrical features and prepared at low costs.

    摘要翻译： 电介质陶瓷组合物由选自Ba2Ti9O20，BaTi2O5，BaTi4O9和Ba4Ti13O30的钨青铜型晶体结构相，一种钛酸钡 - 钡相或更多种钛酸钡 - 钡相组成，以及包含各自的氧化物的细晶相 最少的B，Ag和Mn，其中青铜形式的晶体结构相形成有限量的作为碱性组分的Ba，Nd和Ti的复合氧化物，并且含有有限量的每种氧化物的 最少的Bi，Pb，Zn和Si。 电介质陶瓷组合物可以在920℃以下的温度下烧结，烧结成陶瓷电子部件，其电介质特性如介电常数为60以上，Q为1000以上， 相对介电常数εr的温度系数τεr为+/- 60ppm /℃以下。 高频陶瓷电子部件还具有较高的电气特性，且成本低廉。

    Ceramic materials of improved dielectric constants, and capacitors fabricated therefrom
    2.
    发明授权
    Ceramic materials of improved dielectric constants, and capacitors fabricated therefrom 失效
    具有改善的介电常数的陶瓷材料和由其制造的电容器

    公开(公告)号：US5296425A

    公开(公告)日：1994-03-22

    申请号：US98640

    申请日：1993-07-28

    申请人： Hirokazu Chazono ,  Yasuyuki Inomata ,  Kazuyuki Shibuya ,  Katsuyuki Horie

    发明人： Hirokazu Chazono ,  Yasuyuki Inomata ,  Kazuyuki Shibuya ,  Katsuyuki Horie

    IPC分类号： C04B35/465 ,  C04B35/49 ,  H01G4/12

    CPC分类号： H01G4/1227 ,  C04B35/465 ,  C04B35/49 ,  H01G4/1245

    摘要： A dielectric ceramic composition consists essentially of 100 mole parts of a major ingredient expressed by the formula,(Ba.sub.1-x Ca.sub.x)(Ti.sub.1-y Zr.sub.y)O.sub.3,where x is a numeral in the range of 0.01 to 0.10, and y is a numeral in the range of 0.10 to 0.24. To this major ingredient there are added from 0.10 to 2.0 mole parts of an erbium compound, and from 0.03 to 0.30 mole part of a manganese compound. Optionally, for the provision of low temperature sinterable ceramic compositions, there are also added from 0.03 to 0.40 mole part of a zinc compound and from 0.01 to 0.20 mole part of a silicon compound. Monolithic, solid dielectric capacitors are also disclosed which have ceramic bodies formulated from the above compositions.

    摘要翻译： 介电陶瓷组合物基本上由100摩尔份由式（Ba1-xCax）（Ti1-yZry）O3表示的主要成分组成，其中x是0.01至0.10的数字，y是数字 范围为0.10〜0.24。 对于该主要成分，添加0.10〜2.0摩尔份的铒化合物和0.03〜0.30摩尔的锰化合物。 任选地，为了提供低温可烧结陶瓷组合物，还加入0.03至0.40摩尔份的锌化合物和0.01至0.20摩尔份的硅化合物。 还公开了具有由上述组成配制的陶瓷体的单片固体介质电容器。

    Multi-layer capacitor and method for manufacturing same
    4.
    发明授权
    Multi-layer capacitor and method for manufacturing same 有权
    多层电容器及其制造方法

    公开(公告)号：US06710998B1

    公开(公告)日：2004-03-23

    申请号：US10610548

    申请日：2003-07-02

    申请人： Kenji Saito ,  Hirokazu Chazono

    发明人： Kenji Saito ,  Hirokazu Chazono

    IPC分类号： H01G420

    CPC分类号： H01G4/30 ,  H01G4/35 ,  H01G4/385

    摘要： A multi-layer capacitor includes a plurality of dielectric layers, a pair of external electrodes and a multiplicity of internal electrode layers, each internal electrode layer being interposed between every two neighboring dielectric layers. Said two neighboring internal electrode layers and the dielectric layer disposed therebetween form a unit capacitor so that the multiplicity of internal electrode layers and the dielectric layers therebetween constitute a stack of three or more vertically stacked unit capacitors. The electrostatic capacitance of the unit capacitor located at a center of the stack is greater than those of the unit capacitors located at an is upper end and a lower end of the stack.

    摘要翻译： 多层电容器包括多个电介质层，一对外部电极和多个内部电极层，每个内部电极层插在每两个相邻的电介质层之间。 所述两个相邻的内部电极层和设置在其间的电介质层形成单位电容器，使得多个内部电极层和其间的电介质层构成三个或更多个垂直堆叠的单位电容器的堆叠。 位于堆叠中心的单位电容器的静电电容大于位于堆叠的上端和下端的单位电容器的静电电容。

    Solid dielectric capacitor and method of manufacture
    5.
    发明授权
    Solid dielectric capacitor and method of manufacture 失效
    固体电介质电容器及其制造方法

    公开(公告)号：US5075819A

    公开(公告)日：1991-12-24

    申请号：US618655

    申请日：1990-11-27

    申请人： Hiroshi Saito ,  Mutsumi Honda ,  Hiroshi Kishi ,  Hisamitsu Shizuno ,  Hirokazu Chazono

    发明人： Hiroshi Saito ,  Mutsumi Honda ,  Hiroshi Kishi ,  Hisamitsu Shizuno ,  Hirokazu Chazono

    IPC分类号： C04B35/49 ,  H01G4/12

    CPC分类号： C04B35/49 ,  H01G4/1245 ,  Y10T29/435

    摘要： A monolithic capacitor having a dielectric ceramic body cosintered with at least two base metal electrodes. The ceramic body is composed of a major ingredient expressed by the formula,(1-.alpha.) {(Ba.sub.k-x M.sub.x)O.sub.k (Ti.sub.1-y R.sub.y)O.sub.2-(y/2) }+.alpha.CaZrO.sub.3where M is either or both of calcium and strontium, R is a rare earth element or elements, and .alpha., k, x and y are numerals in specified ranges. To this major ingredient is added a minor proportion of an additive. The additive is a mixture of boric oxide or lithium oxide, silicon dioxide and at least one metal oxide selected from among barium oxide, strontium oxide, calcium oxide, magnesium oxide and zinc oxide. For the fabrication of capacitors the mixture of the above major ingredient and additives in finely divided form are formed into moldings of desired shape and size, each with at least two electrodes buried therein. The moldings and electrodes are cosintered in a reductive or neutral atmosphere at temperatures of less than 1200 degrees C. and then are heated at a lower temperature in an oxidative atmosphere.

    Prepared ceramic powder
    10.
    发明授权
    Prepared ceramic powder 有权
    制备陶瓷粉末

    公开(公告)号：US06254991B1

    公开(公告)日：2001-07-03

    申请号：US09436346

    申请日：1999-11-09

    申请人： Yasuhisa Kono ,  Kenji Saito ,  Yoichi Mizuno ,  Hirokazu Chazono

    发明人： Yasuhisa Kono ,  Kenji Saito ,  Yoichi Mizuno ,  Hirokazu Chazono

    IPC分类号： B32B1502

    CPC分类号： C04B35/62818 ,  C04B35/4682 ,  C04B35/472 ,  C04B35/49 ,  C04B35/491 ,  C04B35/628 ,  C04B35/62805 ,  C04B35/62826 ,  C04B35/62886 ,  C04B2235/3215 ,  C04B2235/3234 ,  C04B2235/3236 ,  C04B2235/3239 ,  C04B2235/3241 ,  C04B2235/3249 ,  C04B2235/3251 ,  C04B2235/3267 ,  C04B2235/3277 ,  C04B2235/5445 ,  H01G4/12 ,  H01G4/1227 ,  H01G4/1245 ,  Y10T428/2991

    摘要： The process for preparing ceramic powder having a core-shell structure by dissolving a crystalline ceramic powder In water so as to leave a core portion of the ceramic powder while heating; depositing a component of the ceramic powder dissolved in the water on and around surfaces of the core portion thereof as a deposited material from the water by gradually cooling the ceramic powder and the water obtained in the step of dissolving; and firing a mixture of the ceramic powder obtained in the step of depositing with an additive at a high temperature to subject the deposited material and the additive to solid phase reaction to form a shell portion on and around the core portion of the ceramic powder. The process can produce the ceramic powder having a core-shell structure from a crystalline ceramic powder, thereby achieving high electrical and mechanical features when formed into ceramic electronic parts. On the other hand, conventional ceramic electronic parts produced from highly crystalline ceramic powder raise the manufacturing cost because such ceramic powder is low in reactivity so that it requires high firing temperature. Ceramic powder in a core-shell structure produced from low-crystalline ceramic powder results to conventional ceramic electronic parts which are poor in electrical and mechanical characteristics.

    摘要翻译： 通过将结晶陶瓷粉末溶解在水中以在加热时留下陶瓷粉末的核心部分来制备具有核 - 壳结构的陶瓷粉末的方法; 通过逐渐冷却陶瓷粉末和溶解步骤中得到的水，将从其水中沉积的作为沉积材料的芯部的表面上的溶解在水中的陶瓷粉末的组分沉淀在水中; 并在高温下焙烧在沉积步骤中与添加剂步骤获得的陶瓷粉末的混合物，以使沉积材料和添加剂进行固相反应，以在陶瓷粉末的芯部分上和周围形成壳部分。 该方法可以从陶瓷粉末制成具有核 - 壳结构的陶瓷粉末，从而在形成陶瓷电子部件时实现高的电气和机械特性。另一方面，由高结晶陶瓷粉末制备的常规陶瓷电子部件提高了 制造成本是因为这样的陶瓷粉末的反应性低，因此需要高的烧制温度。 由低结晶陶瓷粉末制成的芯壳结构中的陶瓷粉末导致电气和机械特性差的常规陶瓷电子部件。