公开(公告)号：US20170287635A1

公开(公告)日：2017-10-05

申请号：US15466224

申请日：2017-03-22

Applicant: TDK CORPORATION

Inventor： Dan SAKURAI ,  Nobuto MORIGASAKI ,  Tatsuya ISHII ,  Takuma ARIIZUMI ,  Shinsuke HASHIMOTO ,  Yasuhiro ITO

IPC: H01G4/12 ,  H01G4/248 ,  C04B35/64 ,  C04B35/49 ,  C04B35/63 ,  C04B35/626 ,  H01G4/30 ,  H01G4/012

CPC classification number: H01G4/1245 ,  C01G25/006 ,  C04B35/4682 ,  C04B35/49 ,  C04B35/6261 ,  C04B35/62675 ,  C04B35/6303 ,  C04B35/638 ,  C04B35/64 ,  C04B2235/3203 ,  C04B2235/3206 ,  C04B2235/3208 ,  C04B2235/3213 ,  C04B2235/3215 ,  C04B2235/3217 ,  C04B2235/3224 ,  C04B2235/3225 ,  C04B2235/3227 ,  C04B2235/3229 ,  C04B2235/3236 ,  C04B2235/3241 ,  C04B2235/3249 ,  C04B2235/3262 ,  C04B2235/3272 ,  C04B2235/3275 ,  C04B2235/3287 ,  C04B2235/3409 ,  C04B2235/3418 ,  C04B2235/652 ,  C04B2235/6562 ,  C04B2235/6565 ,  C04B2235/6567 ,  C04B2235/6584 ,  C04B2235/662 ,  C04B2235/768 ,  C04B2235/81 ,  C04B2235/96 ,  H01G4/012 ,  H01G4/248 ,  H01G4/30

Abstract: A dielectric ceramic composition having good characteristic even under high electric field intensity, and particularly good IR characteristic and high temperature accelerated lifetime. The present invention is a dielectric ceramic composition comprising, a main component comprising a perovskite type compound shown by a compositional formula (Ba1-x-ySrxCay)m(Ti1-zZrz)O3, a first sub component comprising oxides of a rare earth element, a second sub component as a sintering agent, wherein said dielectric ceramic composition is a complete solid solution particle wherein the rare earth element is solid dissolved to entire dielectric particle, or a core-shell particle having high ratio of the diffusion phase, and comprises the dielectric particle having 5 to 20 atom % of the average concentration of the rare earth element in the diffusion phase, and having uniform concentration distribution of the rare earth element in the diffusion phase.

公开(公告)号：US20160268045A1

公开(公告)日：2016-09-15

申请号：US15064431

申请日：2016-03-08

Applicant: TDK CORPORATION

Inventor： Toshihiko KANEKO ,  Tatsuya FUJINO ,  Nobuto MORIGASAKI ,  Yasuhiro ITO

IPC: H01G4/12 ,  C04B35/468

CPC classification number: H01G4/1227 ,  C04B35/4682 ,  C04B35/488 ,  C04B35/49 ,  C04B2235/3206 ,  C04B2235/3208 ,  C04B2235/3213 ,  C04B2235/3215 ,  C04B2235/3224 ,  C04B2235/3225 ,  C04B2235/3236 ,  C04B2235/3239 ,  C04B2235/3249 ,  C04B2235/3262 ,  C04B2235/3418 ,  C04B2235/5454 ,  C04B2235/6025 ,  C04B2235/6562 ,  C04B2235/6565 ,  C04B2235/6567 ,  C04B2235/6584 ,  C04B2235/6588 ,  C04B2235/768 ,  C04B2235/79 ,  C04B2235/80 ,  C04B2237/346 ,  C04B2237/68 ,  H01G4/30

Abstract: A dielectric ceramic composition including a main component having a perovskite crystal structure expressed by general formula ABO3, a first sub-component of an oxide of a rare earth element, and a second sub-component of an oxide of Si, and at least dielectric particles having a core-shell structure and segregated particles, in which a concentration of the rare earth element in the segregated particles is two or more times an average concentration of the rare earth element in a shell portion of the dielectric particles having the core-shell structure, and an area of the region occupied by the segregated particles is 5.0% or less and an average of cross-sectional areas of the respective segregated particles is 0.075 μm2 or less in a cross-section obtained by cutting the dielectric ceramic composition.

Abstract translation: 一种电介质陶瓷组合物，其包含具有由通式ABO 3表示的钙钛矿晶体结构的主要成分，稀土元素的氧化物的第一亚成分和Si的氧化物的第二子成分，至少介电粒子 具有核 - 壳结构和偏析粒子，其中分离粒子中的稀土元素的浓度是具有核 - 壳结构的电介质粒子的壳部中的稀土元素的平均浓度的两倍或更多倍 ，并且由偏析粒子占据的区域的面积为5.0％以下，在通过切断电介质陶瓷组合物而得到的截面中，各偏析粒子的截面积的平均值为0.075μm2以下。