JP5067401B2 - 誘電体セラミックおよびその製造方法ならびに積層セラミックコンデンサ - Google Patents
誘電体セラミックおよびその製造方法ならびに積層セラミックコンデンサ Download PDFInfo
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Description
誘電体セラミックの主成分となるべき出発原料として、BaCO3、CaCO3、SrCO3、TiO2、ZrO2、Gd2O3およびMgOの各粉末を準備した。なお、BaCO3粉末としては、比表面積が11m2/gのもの、およびTiO2粉末としては、比表面積が13m2/gのものをそれぞれ選択した。
誘電体セラミックの主成分となるべき出発原料として、BaCO3、CaCO3、SrCO3、TiO2およびZrO2の各粉末、Reの酸化物であるLa2O3、CeO2、Pr6O11、Nd2O3、Sm2O3、Eu2O3、Gd2O3、Tb4O7、Dy2O3、Ho2O3、Er2O3、Tm2O3、Yb2O3、Lu2O3およびY2O3の各粉末、ならびに、Mの酸化物であるMgO、NiO、MnO、Al2O3、Cr2O3およびZnOの各粉末を準備した。なお、BaCO3粉末およびTiO2粉末については、実験例1で選択したものと同様の比表面積のものを選択した。
2 誘電体セラミック層
3,4 内部電極
5 コンデンサ本体
6,7 外部電極
Claims (3)
- 一般式:(Ba1−h−m−xCahSrmRex)k(Ti1−n−yZrnMy)O3で表わされ、Reは、La、Ce、Pr、Nd、Sm、Eu、Gd、Tb、Dy、Ho、Er、Tm、Yb、LuおよびYのうちの少なくとも1種であり、Mは、Mg、Ni、Mn、Al、CrおよびZnのうちの少なくとも1種であり、かつ、0.05≦x≦0.50、0.02≦y≦0.3、0.85≦k≦1.05、0≦h≦0.25、0≦m≦0.50、および0≦n≦0.40の各関係を満足する、チタン酸バリウム系複合酸化物からなる、主成分と、
焼結助剤としての副成分と
を含み、
焼結体における結晶粒子の平均粒径が0.6μm以下である、
誘電体セラミック。 - 一般式:(Ba1−h−m−xCahSrmRex)k(Ti1−n−yZrnMy)O3で表わされ、Reは、La、Ce、Pr、Nd、Sm、Eu、Gd、Tb、Dy、Ho、Er、Tm、Yb、LuおよびYのうちの少なくとも1種であり、Mは、Mg、Ni、Mn、Al、CrおよびZnのうちの少なくとも1種であり、かつ、0.05≦x≦0.50、0.02≦y≦0.3、0.85≦k≦1.05、0≦h≦0.25、0≦m≦0.50、および0≦n≦0.40の各関係を満足する、チタン酸バリウム系複合酸化物からなる、反応物を得る、第1の工程と、
焼結助剤となる副成分を用意する、第2の工程と、
前記第1の工程で得られた前記反応物に、前記第2の工程で用意された前記副成分を混合する、第3の工程と、
前記第3の工程で得られた混合物を焼成する、第4の工程と
を備え、
前記第1の工程では、前記反応物を得るため、BaCO3粉末を含む複数の原料粉末を仮焼する工程が実施され、仮焼後の粉末のX線回折解析によるBaCO3の(111)回折ピークとBaTiO3の(110)回折ピークとの強度比が15/1000以上かつ200/1000以下となるように、未反応物を残留させるようにされ、前記第3の工程で得られた前記混合物は、前記未反応物をも含むことを特徴とする、
誘電体セラミックの製造方法。 - 積層された複数の誘電体セラミック層、および前記誘電体セラミック層間の特定の界面に沿って形成された複数の内部電極をもって構成される、コンデンサ本体と、
前記コンデンサ本体の外表面上の互いに異なる位置に形成され、かつ前記内部電極の特定のものに電気的に接続される、複数の外部電極と
を備え、
前記誘電体セラミック層は、請求項1に記載の誘電体セラミックからなる、
積層セラミックコンデンサ。
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JP2009154634A JP5067401B2 (ja) | 2009-06-30 | 2009-06-30 | 誘電体セラミックおよびその製造方法ならびに積層セラミックコンデンサ |
US12/791,910 US8358494B2 (en) | 2009-06-30 | 2010-06-02 | Dielectric ceramic and manufacturing method therefor and laminated ceramic capacitor |
CN201010219756.7A CN101935211B (zh) | 2009-06-30 | 2010-06-29 | 电介质陶瓷及其制造方法以及层叠陶瓷电容器 |
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JP5655866B2 (ja) * | 2011-01-12 | 2015-01-21 | 株式会社村田製作所 | 積層セラミックコンデンサ及び積層セラミックコンデンサの製造方法 |
DE112012003469T5 (de) * | 2011-08-23 | 2014-07-10 | Murata Manufacturing Co., Ltd. | Laminierter Keramikkondensator und Herstellungsverfahren für einen laminierten Keramikkondensator |
WO2013073458A1 (ja) * | 2011-11-18 | 2013-05-23 | シャープ株式会社 | 照明装置、表示装置及びテレビ受信装置 |
KR101650746B1 (ko) * | 2012-07-10 | 2016-08-24 | 가부시키가이샤 무라타 세이사쿠쇼 | 적층 세라믹 콘덴서 및 그 제조방법 |
KR20140118557A (ko) | 2013-03-29 | 2014-10-08 | 삼성전기주식회사 | 유전체 자기 조성물 및 이를 포함하는 적층 세라믹 캐패시터 |
KR101853290B1 (ko) * | 2013-07-09 | 2018-04-30 | 가부시키가이샤 무라타 세이사쿠쇼 | 적층 세라믹 콘덴서 |
KR101994723B1 (ko) * | 2013-10-30 | 2019-07-01 | 삼성전기주식회사 | 외부전극용 도전성 페이스트 조성물, 이를 이용한 적층 세라믹 전자부품 및 그 제조방법 |
KR101659143B1 (ko) * | 2014-04-16 | 2016-09-22 | 삼성전기주식회사 | 유전체 자기 조성물 및 이를 포함하는 적층 세라믹 커패시터 |
KR20160123645A (ko) | 2015-04-16 | 2016-10-26 | 삼성전기주식회사 | 유전체 자기 조성물 및 이를 포함하는 적층 세라믹 커패시터 |
US10773972B2 (en) | 2016-07-13 | 2020-09-15 | Skyworks Solutions, Inc. | Temperature insensitive dielectric constant garnets |
WO2020018572A1 (en) * | 2018-07-18 | 2020-01-23 | Skyworks Solutions, Inc. | Magnetic materials with high curie temperatures and dielectric constants |
CN113185280B (zh) * | 2021-04-27 | 2022-06-28 | 四川海祥电子科技有限公司 | 一种高Qf微波介质材料制备方法 |
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