JP5241328B2 - 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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Description
ムをMgO換算で0〜0.1モル、マンガンをMnO換算で0〜0.5モル、イットリウム,ジスプロシウム,ホルミウムおよびエルビウムから選ばれる1種の希土類元素をRE2O3換算で0.5〜1.5モル、イッテルビウムをYb 2 O 3 換算で0.3〜0.7モル含有するとともに、X線回折チャートにおいて、正方晶系のチタン酸バリウムを示す(004)面の回折強度が、立方晶系のチタン酸バリウムを示す(004)面の回折強度よりも大きく、かつ前記結晶粒子の平均粒径が0.21〜0.28μmであることを特徴とする。
まず、原料粉末として、BT粉末、MgO粉末、Y2O3粉末、Dy2O3粉末、Ho2O3粉末、Er2O3粉末、Tb4O7粉末(第2希土類元素)、MnCO3粉末およびV2O5粉末を準備し、これらの各種粉末を表1に示す割合で混合した。これらの原料粉末は純度が99.9%のものを用いた。なお、BT粉末の平均粒径は表1に示した。MgO粉末、Y2O3粉末、Dy2O3粉末、Ho2O3粉末、Er2O3粉末、Tb4O7粉末、MnCO3粉末およびV2O5粉末は平均粒径が0.1μmのものを用いた。BT粉末のBa/Ti比は1とした。焼結助剤はSiO2=55、BaO=20、CaO=15、Li2O=10(モル%)組成のガラス粉末を用いた。ガラス粉末の添加量はBT粉末100質量部に対して1質量部とした。
[実施例2]
次に、実施例1に示した本発明の試料である各組成に、さらにイッテルビウムをYb2O3換算で0.35モル添加して、実施例1と同様の方法で試料を作製し評価した(試料No.2−1〜2−21)。
7 内部電極層
10 コンデンサ本体
Claims (5)
- 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V2O5換算で0.05〜0.3モル、マグネシウムをMgO換算で0〜0.1モル、マンガンをMnO換算で0〜0.5モル、イットリウム,ジスプロシウム,ホルミウムおよびエルビウムから選ばれる1種の希土類元素をRE2O3換算で0.5〜1.5モル、イッテルビウムをYb 2 O 3 換算で0.3〜0.7モル含有するとともに、X線回折チャートにおいて、正方晶系のチタン酸バリウムを示す(004)面の回折強度が、立方晶系のチタン酸バリウムを示す(004)面の回折強度よりも大きく、かつ前記結晶粒子の平均粒径が0.21〜0.28μmであることを特徴とする誘電体磁器。
- 前記マグネシウムがMgO換算で0モルであることを特徴とする請求項1に記載の誘電体磁器。
- 前記マンガンがMnO換算で0モルであることを特徴とする請求項2に記載の誘電体磁器。
- 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、さらにテルビウムをTb4O7換算で0.3モル以下含有することを特徴とする請求項1乃至3のうちいずれかに記載の誘電体磁器。
- 請求項1乃至4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。
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JP2008139329A JP5241328B2 (ja) | 2008-05-28 | 2008-05-28 | 誘電体磁器および積層セラミックコンデンサ |
PCT/JP2009/055984 WO2009145001A1 (ja) | 2008-05-28 | 2009-03-25 | 誘電体磁器および積層セラミックコンデンサ |
TW98110148A TWI416561B (zh) | 2008-05-28 | 2009-03-27 | Dielectric ceramics and laminated ceramic capacitors |
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JP2008139329A JP5241328B2 (ja) | 2008-05-28 | 2008-05-28 | 誘電体磁器および積層セラミックコンデンサ |
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JP2009286648A JP2009286648A (ja) | 2009-12-10 |
JP5241328B2 true JP5241328B2 (ja) | 2013-07-17 |
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KR101580349B1 (ko) | 2012-01-31 | 2015-12-24 | 삼성전기주식회사 | 적층 세라믹 전자 부품 및 그 제조 방법 |
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JP2005145791A (ja) * | 2003-11-19 | 2005-06-09 | Tdk Corp | 電子部品、誘電体磁器組成物およびその製造方法 |
JP4396608B2 (ja) * | 2005-09-30 | 2010-01-13 | Tdk株式会社 | 誘電体磁器組成物および電子部品 |
US8203825B2 (en) * | 2007-04-20 | 2012-06-19 | Kyocera Corporation | Dielectric ceramics and multilayer ceramic capacitor |
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TWI416561B (zh) | 2013-11-21 |
JP2009286648A (ja) | 2009-12-10 |
WO2009145001A1 (ja) | 2009-12-03 |
TW200949874A (en) | 2009-12-01 |
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