公开(公告)号：US09691549B2

公开(公告)日：2017-06-27

申请号：US14178659

申请日：2014-02-12

Applicant: MURATA MANUFACTURING CO., LTD.

Inventor： Akihiro Shiota ,  Makoto Matsuda

IPC: H01G4/12 ,  H01G4/30

CPC classification number: H01G4/12 ,  H01G4/1227 ,  H01G4/30

Abstract: A laminated ceramic capacitor that includes a laminated body that has dielectric ceramic layers including crystal grains and crystal grain boundaries and has internal electrode layers; and external electrodes on the surface of the laminated body and electrically connecting the internal electrode layers exposed at the surfaces of the laminated body. When a direct-current voltage is applied to the laminated ceramic capacitor, the voltage/current curve has a critical point dividing the curve into a first area on the lower-voltage side and a second area on the higher-voltage side, an electric field obtained by dividing the critical voltage at the critical point by the thickness of one of the dielectric ceramic layers when the voltage (V)/current (I) characteristics are measured at 25° C. is 10 V/μm or more, and the voltage/current curve has a slope of 3 or less in the second area.

公开(公告)号：US09275797B2

公开(公告)日：2016-03-01

申请号：US14011499

申请日：2013-08-27

Applicant: MURATA MANUFACTURING CO., LTD.

Inventor： Shoichiro Suzuki ,  Koichi Banno ,  Akihiro Shiota ,  Masahiro Otsuka ,  Taisuke Kanzaki ,  Masanori Nakamura

IPC: H01G4/12 ,  H01B3/12 ,  C04B35/468 ,  C04B35/626 ,  C04B35/638 ,  H01G4/30 ,  B82Y30/00

CPC classification number: H01G4/1227 ,  B82Y30/00 ,  C04B35/4682 ,  C04B35/62675 ,  C04B35/62685 ,  C04B35/638 ,  C04B2235/3201 ,  C04B2235/3203 ,  C04B2235/3208 ,  C04B2235/3213 ,  C04B2235/3215 ,  C04B2235/3232 ,  C04B2235/3244 ,  C04B2235/3281 ,  C04B2235/3284 ,  C04B2235/3298 ,  C04B2235/44 ,  C04B2235/5454 ,  C04B2235/781 ,  C04B2235/785 ,  H01B3/12 ,  H01G4/1236 ,  H01G4/30

Abstract: A dielectric ceramic that can be sintered at a sufficiently low temperature and has a desired specific resistance at a high temperature, and a multilayer ceramic electronic component (a multilayer ceramic capacitor and the like) using the dielectric ceramic are provided. The multilayer ceramic capacitor includes a multilayer body having a plurality of laminated dielectric ceramic layers, and a plurality of internal electrodes at interfaces between the dielectric ceramic layers; and external electrodes 8 and 9 on outer surfaces of the multilayer body. The composition of the multilayer body includes a perovskite-type compound containing Ba and Ti (where a part of Ba may be substituted by Ca, and a part of Ti may be substituted by Zr) as a primary ingredient, and further includes M (where M is at least one of Cu, Zn, Li, K, and Na) and Bi. The total content of M and Bi is equal to or greater than 3 molar parts when the total content of Ti and Zr is 100 molar parts. The crystal particle size of the dielectric ceramic is 30 nm or more and 150 nm or less.

Abstract translation: 提供可以在足够低的温度下烧结并且在高温下具有所需电阻率的电介质陶瓷，以及使用电介质陶瓷的多层陶瓷电子部件（多层陶瓷电容器等）。 多层陶瓷电容器包括具有多个层压电介质陶瓷层的多层体和在介电陶瓷层之间的界面处的多个内部电极; 以及在多层体的外表面上的外部电极8和9。 多层体的组成包括含有Ba和Ti（其中Ba的一部分可以被Ca取代，Ti的一部分可以被Zr取代）的钙钛矿型化合物作为主要成分，并且还包括M（其中 M是Cu，Zn，Li，K和Na中的至少一种）和Bi。 当Ti和Zr的总含量为100摩尔份数时，M和Bi的总含量等于或大于3摩尔份。 电介质陶瓷的结晶粒径为30nm以上且150nm以下。

公开(公告)号：US09064638B2

公开(公告)日：2015-06-23

申请号：US13803925

申请日：2013-03-14

Applicant: MURATA MANUFACTURING CO., LTD.

Inventor： Shoichiro Suzuki ,  Masanori Nakamura ,  Koichi Banno ,  Taisuke Kanzaki ,  Akihiro Shiota ,  Masahiro Otsuka

IPC: C04B35/468 ,  H01G4/06 ,  H01G4/30 ,  C04B35/49 ,  H01B3/12 ,  H01G4/12 ,  H01G4/00 ,  C04B35/626 ,  C01G25/00 ,  C01G29/00

CPC classification number: H01G4/30 ,  C01G25/006 ,  C01G29/006 ,  C04B35/468 ,  C04B35/4682 ,  C04B35/49 ,  C04B35/62685 ,  C04B2235/3208 ,  C04B2235/3213 ,  C04B2235/3215 ,  C04B2235/3248 ,  C04B2235/3281 ,  C04B2235/3298 ,  C04B2235/6562 ,  C04B2235/768 ,  C04B2235/79 ,  H01B3/12 ,  H01G4/00 ,  H01G4/1227

Abstract: A dielectric ceramic enabling low-temperature firing and exhibiting good dielectric characteristics, and a stack ceramic electronic component using the same are provided. The dielectric ceramic containing (Ba1-x-yCaxSry)m(Ti1-zZrz)O3 (1.005≦m≦1.2, 0≦x+y≦0.2, and 0≦z≦0.2) as a major component and an amount of Bi relative to 100 parts by mol of the major component which is 1.0 part by mol or more and 40 parts by mol or less.

Abstract translation: 提供能够进行低温烧制并且具有良好的介电特性的电介质陶瓷，以及使用其的叠层陶瓷电子元件。 含有（Ba1-x-yCaxSry）m（Ti1-zZrz）O3（1.005＆nlE; m＆nlE; 1.2,0＆nlE; x + y＆nlE; 0.2和0＆amp; nlE; z＆nlE; 0.2）的介电陶瓷作为主要成分， 相对于100份（摩尔）为1.0份摩尔以上且40份（摩尔）以下的主成分。