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A platform for research: civil engineering, architecture and urbanism
DIELECTRIC CERAMIC COMPOSITION AND CERAMIC ELECTRONIC COMPONENT
PROBLEM TO BE SOLVED: To provide a ceramic electronic component in which, even when the dielectric substance layer is made thinner, the capacity-temperature characteristic satisfies X8R characteristic, and in which the reliability under a high voltage environment is satisfactory, and to provide a dielectric ceramic composition that forms said dielectric substance layer.SOLUTION: Provided is a dielectric ceramic composition containing a primary constituent having a perovskite crystal structure represented by a general formula of ABO, a first sub-constituent of an oxide of rare-earth element, and a second sub-constituent of an oxide of Si, and at least containing a dielectric particle 2a having a core-shell structure, and a segregation particle 2b, and in which the concentration of the rare-earth element in the segregation particle 2b is 2-folds or more of the average concentration of the rare-earth element in the shell part of the dielectric particle 2a having a core-shell structure, and in respect of a cross-section obtained by cutting the dielectric ceramic composition, the area of a region occupied by segregation particle 2b is 5.0% or less, and the average of the cross-section area of each segregation particle 2b is 0.075 μmor less.SELECTED DRAWING: Figure 2
【課題】誘電体層を薄層化しても容量温度特性がＸ８Ｒ特性を満足し、高電圧環境下での信頼性が良好なセラミック電子部品および前記誘電体層を構成する誘電体磁器組成物の提供。【解決手段】一般式ＡＢＯ３で表されるペロブスカイト型結晶構造を有する主成分と、希土類元素の酸化物である第１の副成分と、Ｓｉの酸化物である第２の副成分と、を含有する誘電体磁器組成物であって、コアシェル構造を有する誘電体粒子２ａ、および、偏析粒子２ｂを少なくとも含有し、偏析粒子２ｂにおける前記希土類元素の濃度が、コアシェル構造を有する誘電体粒子２ａのシェル部における前記希土類元素の平均濃度の２倍以上であり、前記誘電体磁器組成物を切断した断面において、偏析粒子２ｂが占める領域の面積が５．０％以下であり、それぞれの偏析粒子２ｂの断面積の平均が０．０７５μｍ２以下である誘電体磁器組成物。【選択図】図２
DIELECTRIC CERAMIC COMPOSITION AND CERAMIC ELECTRONIC COMPONENT
PROBLEM TO BE SOLVED: To provide a ceramic electronic component in which, even when the dielectric substance layer is made thinner, the capacity-temperature characteristic satisfies X8R characteristic, and in which the reliability under a high voltage environment is satisfactory, and to provide a dielectric ceramic composition that forms said dielectric substance layer.SOLUTION: Provided is a dielectric ceramic composition containing a primary constituent having a perovskite crystal structure represented by a general formula of ABO, a first sub-constituent of an oxide of rare-earth element, and a second sub-constituent of an oxide of Si, and at least containing a dielectric particle 2a having a core-shell structure, and a segregation particle 2b, and in which the concentration of the rare-earth element in the segregation particle 2b is 2-folds or more of the average concentration of the rare-earth element in the shell part of the dielectric particle 2a having a core-shell structure, and in respect of a cross-section obtained by cutting the dielectric ceramic composition, the area of a region occupied by segregation particle 2b is 5.0% or less, and the average of the cross-section area of each segregation particle 2b is 0.075 μmor less.SELECTED DRAWING: Figure 2
【課題】誘電体層を薄層化しても容量温度特性がＸ８Ｒ特性を満足し、高電圧環境下での信頼性が良好なセラミック電子部品および前記誘電体層を構成する誘電体磁器組成物の提供。【解決手段】一般式ＡＢＯ３で表されるペロブスカイト型結晶構造を有する主成分と、希土類元素の酸化物である第１の副成分と、Ｓｉの酸化物である第２の副成分と、を含有する誘電体磁器組成物であって、コアシェル構造を有する誘電体粒子２ａ、および、偏析粒子２ｂを少なくとも含有し、偏析粒子２ｂにおける前記希土類元素の濃度が、コアシェル構造を有する誘電体粒子２ａのシェル部における前記希土類元素の平均濃度の２倍以上であり、前記誘電体磁器組成物を切断した断面において、偏析粒子２ｂが占める領域の面積が５．０％以下であり、それぞれの偏析粒子２ｂの断面積の平均が０．０７５μｍ２以下である誘電体磁器組成物。【選択図】図２
DIELECTRIC CERAMIC COMPOSITION AND CERAMIC ELECTRONIC COMPONENT
誘電体磁器組成物およびセラミック電子部品
KANEKO TOSHIHIKO (author) / FUJINO TATSUYA (author) / MORIGASAKI NOBUTO (author) / ITO YASUHIRO (author)
2016-09-23
Patent
Electronic Resource
Japanese
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