JP2008239407A - 誘電体磁器および積層セラミックコンデンサ - Google Patents
誘電体磁器および積層セラミックコンデンサ Download PDFInfo
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Abstract
【解決手段】コアシェル構造を有し、チタン酸バリウムを主成分とする結晶粒子と、該結晶粒子間に存在する粒界相とを有する誘電体磁器であって、前記結晶粒子に対して、バナジウム、マグネシウムおよび希土類元素およびマンガンをそれぞれ所定の割合で含有させて、キュリー温度を80〜90℃の範囲としたことにより、高誘電率かつ比誘電率の温度特性の安定性に優れるとともに、絶縁抵抗の電圧依存性の小さい誘電体磁器を得ることができる。
【選択図】図1
Description
3 シェル部
5 誘電体層
7 内部電極層
10A 積層体
Claims (4)
- コアシェル構造を有し、チタン酸バリウムを主成分とする結晶粒子と、該結晶粒子間に存在する粒界相とを有する誘電体磁器であって、前記チタン酸バリウムを構成するバリウム100モルに対して、バナジウムを酸化物換算で0.1〜0.2モル、マグネシウムを酸化物換算で0.55〜0.75モル、イットリウム、ディスプロシウム、ホルミウム、エルビウムおよびテルビウムのうち少なくとも1種の希土類元素を酸化物換算で0.55〜0.75モル、およびマンガンを酸化物換算で0.25〜0.6モル含有し、キュリー温度が80〜90℃であることを特徴とする誘電体磁器。
- 前記マンガンを酸化物換算で0.25〜0.35モル含有することを特徴とする請求項1に記載の誘電体磁器。
- 前記結晶粒子の平均粒径が0.25〜0.35μmであることを特徴とする請求項1または2に記載の誘電体磁器。
- 請求項1乃至3のうちいずれかに記載の誘電体磁器からなる誘電体層と内部電極層との積層体から構成されていることを特徴とする積層セラミックコンデンサ。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007082905A JP5046700B2 (ja) | 2007-03-27 | 2007-03-27 | 誘電体磁器および積層セラミックコンデンサ |
PCT/JP2008/055768 WO2008123320A1 (ja) | 2007-03-27 | 2008-03-26 | 誘電体磁器および積層セラミックコンデンサ |
CN2008800096153A CN101641305B (zh) | 2007-03-27 | 2008-03-26 | 电介体瓷器及层叠陶瓷电容器 |
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- 2008-03-26 CN CN2008800096153A patent/CN101641305B/zh active Active
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US8238077B2 (en) | 2012-08-07 |
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US20100014214A1 (en) | 2010-01-21 |
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