公开(公告)号：US5335139A

公开(公告)日：1994-08-02

申请号：US90257

申请日：1993-07-13

申请人： Takeshi Nomura ,  Yukie Nakano ,  Akira Satoh ,  Tomohiro Arashi

发明人： Takeshi Nomura ,  Yukie Nakano ,  Akira Satoh ,  Tomohiro Arashi

IPC分类号： H01G4/12 ,  H01G7/00

CPC分类号： H01G4/1227 ,  Y10T29/417 ,  Y10T29/435

摘要： A multilayer ceramic chip capacitor includes alternately stacked dielectric layers and internal electrode layers. The dielectric layers contain barium titanate as a major component and magnesium oxide, manganese oxide, barium oxide and/or calcium oxide, silicon oxide and optionally, yttrium oxide as minor components in such a proportion that there are present 0.1-3 mol of MgO, 0.05-1.0 mol of MnO, 2-12 mol of BaO+CaO, 2-12 mol of SiO.sub.2 and up to 1 mol of Y.sub.2 O.sub.3 per 100 mol of BaTiO.sub.3. The capacitor satisfies the standard temperature dependence of capacitance and shows a minimized change of capacitance with time under an applied DC electric field and a long insulation resistance life. Where the dielectric layers contain 0.1-3 mol of MgO, 1-5 mol of Y.sub.2 O.sub.3, 2-12 mol of BaO+CaO, and 2-12 mol of SiO.sub.2 per 100 mol of BaTiO.sub.3, the capacitor shows improved DC bias performance.

摘要翻译： 多层陶瓷片状电容器包括交替堆叠的电介质层和内部电极层。 电介质层含有钛酸钡作为主要成分，氧化镁，氧化锰，氧化钡和/或氧化钙，氧化硅和任选的氧化钇为少量成分，其中存在0.1-3mol的MgO， 0.05〜1.0摩尔的MnO，2〜12摩尔的BaO + CaO，2〜12摩尔的SiO 2和1摩尔的Y 2 O 3/100摩尔的BaTiO 3。 电容器满足电容的标准温度依赖性，并且在施加的直流电场和长绝缘电阻寿命下显示电容随时间的最小化变化。 当电介质层含有0.1-3mol的MgO，1-5mol的Y2O3，2-12mol的BaO + CaO和2-12mol的SiO 2 / 100mol的BaTiO 3时，电容器显示出改善的DC偏置性能。

公开(公告)号：US08507395B2

公开(公告)日：2013-08-13

申请号：US13221246

申请日：2011-08-30

申请人： Yoshitaka Murakawa ,  Yukie Nakano ,  Shirou Ootsuki

发明人： Yoshitaka Murakawa ,  Yukie Nakano ,  Shirou Ootsuki

IPC分类号： C04B35/468

CPC分类号： H01G4/1227 ,  C04B35/4682 ,  C04B2235/3206 ,  C04B2235/3236 ,  C04B2235/3262 ,  C04B2235/3454 ,  C04B2235/528 ,  C04B2235/768

摘要： A dielectric ceramic composition comprising a compound expressed by a formula of ABO3, where “A” is Ba alone, or Ba and at least one selected from Ca and Sr, and “B” is Ti alone, or Ti and Zr, and having a perovskite-type crystal structure, and an oxide of a rare-earth element including Sc and Y. The dielectric ceramic composition includes a dielectric particle having a core-shell structure which has a core and a shell, the shell being present around the core and including at least “R” element, and in the shell, a region showing a maximum content rate of “R” element is a boundary region between the core and the shell.

摘要翻译： 包含由式ABO3表示的化合物的电介质陶瓷组合物，其中“A”为单独的Ba，或Ba和选自Ca和Sr中的至少一种，“B”为单独的Ti或Ti和Zr，并且具有 钙钛矿型晶体结构，以及包含Sc和Y的稀土元素的氧化物。介电陶瓷组合物包括具有芯壳和壳的核 - 壳结构的电介质颗粒，壳存在于芯周围， 包括至少“R”元素，并且在壳中，显示最大含量率“R”元素的区域是核和壳之间的边界区域。

公开(公告)号：US5319517A

公开(公告)日：1994-06-07

申请号：US38695

申请日：1993-03-29

申请人： Takeshi Nomura ,  Yukie Nakano ,  Akira Satoh ,  Atsushi Hitomi

发明人： Takeshi Nomura ,  Yukie Nakano ,  Akira Satoh ,  Atsushi Hitomi

IPC分类号： H01G4/12 ,  H01G7/00

CPC分类号： H01G4/1245 ,  Y10T29/417 ,  Y10T29/435

摘要： The invention provides a multilayer ceramic chip capacitor having internal electrodes and dielectric layers, wherein a dielectric material containing a dielectric oxide having a composition of the following formula:[(Ba.sub.1-x-y Ca.sub.x Sr.sub.y)O].sub.m (Ti.sub.1-z Zr.sub.z)O.sub.2wherein 0.ltoreq.x.ltoreq.0.25, 0.ltoreq.y.ltoreq.0.05, 0.1.ltoreq.z.ltoreq.0.3, and 1.000.ltoreq.m.ltoreq.1.020 and having added thereto an oxide of Mn and/or a compound which converts to the oxide upon firing in an amount of 0.01 to 0.5% by weight calculated as oxide (MnO), an oxide of Y and/or a compound which converts to the oxide upon firing in an amount of 0.05 to 0.5% by weight calculated as oxide (Y.sub.2 O.sub.3), an oxide of V and/or a compound which converts to the oxide upon firing in an amount of 0.005 to 0.3% by weight calculated as oxide (V.sub.2 O.sub.5), and an oxide of W and/or a compound which converts to the oxide upon firing in an amount of 0.005 to 0.3% by weight calculated as oxide (WO.sub.3), and an internal electrode-forming material in the form of Ni or a Ni alloy are successively layered and fired. The multilayer ceramic chip capacitor allows for low-temperature firing and has a long accelerated life of insulation resistance.

摘要翻译： 本发明提供一种具有内部电极和电介质层的多层陶瓷片状电容器，其中包含具有下式的组成的电介质氧化物的介电材料：[（Ba1-x-yCaxSry）O] m（Ti1-zZrz）O2其中0 其中添加了Mn和/或其中的氧化物，其中， 以氧化物（MnO）计为0.01〜0.5重量％，Y的氧化物和/或以烧成后氧化物的化合物的0.05〜0.5质量％的化合物， 以氧化物（Y 2 O 3）计的氧化物，和/或以烧成后氧化物转化为氧化物的化合物，其氧化物（V 2 O 5）计为0.005〜0.3重量％，W和/或 以氧化物（WO3）计算的0.005〜0.3重量％的煅烧转化为氧化物的化合物和Ni或Ni合金形式的内部电极形成材料依次为l 点燃和开火。 该多层陶瓷片式电容器允许低温烧制并具有长的加速寿命的绝缘电阻。

公开(公告)号：US5097391A

公开(公告)日：1992-03-17

申请号：US599414

申请日：1990-10-18

申请人： Takeshi Nomura ,  Masaaki Ikeda ,  Shigekazu Sumita ,  Yukie Nakano ,  Kousuke Nishiyama ,  Michio Abe

发明人： Takeshi Nomura ,  Masaaki Ikeda ,  Shigekazu Sumita ,  Yukie Nakano ,  Kousuke Nishiyama ,  Michio Abe

IPC分类号： H01G4/12 ,  H01G4/30

CPC分类号： H01G4/30 ,  H01G4/1281 ,  Y10T29/435

摘要： In a ceramic multilayer chip capacitor comprising alternately stacked internal electrodes of Ni or Ni alloy and dielectric layers, an oxide layer having a different composition from the dielectric layer is formed on the periphery of each internal electrode. The dielectric layer consists essentially of grains and a grain boundary phase, the percent area of the grain boundary phase being up to 2% of the area of a cross section of the dielectric layer. The capacitor is prepared by alternately stacking Ni or Ni alloy and a dielectric material in layer form, firing and then heat treating the stack under predetermined oxygen partial pressures. The dielectric material is a barium titanate base oxide material. The capacitor has a long effective life.