JP5267565B2 - セラミック成形体および積層型セラミック電子部品の製造方法 - Google Patents
セラミック成形体および積層型セラミック電子部品の製造方法 Download PDFInfo
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- JP5267565B2 JP5267565B2 JP2010526674A JP2010526674A JP5267565B2 JP 5267565 B2 JP5267565 B2 JP 5267565B2 JP 2010526674 A JP2010526674 A JP 2010526674A JP 2010526674 A JP2010526674 A JP 2010526674A JP 5267565 B2 JP5267565 B2 JP 5267565B2
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Description
高分子分散剤として、以下のように作製したものを用いた。
実験例2では、チタン酸バリウム粉末の平均粒径を50nmと微粒化し、高分子分散剤の含有量を有効分で4.0重量部(チタン酸バリウム粉末の表面積あたり分散剤が1.6mg/m2)と変更したことを除いて、実験例1と同様の条件および同様の操作によって、実施例に係るセラミックグリーンシートおよび積層セラミックコンデンサを作製した。
実験例3では、チタン酸バリウム粉末の平均粒径を10nmとさらに微粒化し、高分子分散剤の含有量を有効分で4.0重量部(チタン酸バリウム粉末の表面積あたり分散剤が0.4mg/m2)と変更したことを除いて、実験例1と同様の条件および同様の操作によって、実施例に係るセラミックグリーンシートおよび積層セラミックコンデンサを作製した。
実験例4では、チタン酸バリウム粉末として、平均粒径が10nm、50nmおよび300nmのものをそれぞれ用いながら、高分子分散剤の添加量を有効分で0.05〜20重量部の範囲で変えたことを除いて、実験例1と同様の条件および同様の操作によって、セラミックグリーンシートおよび積層セラミックコンデンサを作製した。
下の表7に示す原料および仕込み量を用いて、実験例1において用意した高分子分散剤の場合と同様の方法にて、いくつかの種類の高分子分散剤を製造した。なお、表7に示した高分子分散剤DA1〜DA14のうち、高分子分散剤DA1は、実験例1ないし4において用いた高分子分散剤である。また、高分子分散剤DA12〜DA14は、この発明の範囲外のものである。
2 セラミック層
3 内部導体膜
5 セラミック積層体
Claims (4)
- セラミック原料粉末とバインダ成分と溶剤とを含む非水系セラミックスラリーに所定の形状を付与することによって得られた、セラミック成形体であって、
前記セラミック原料粉末を構成するセラミック粒子の表面が分散剤によって覆われていて、
前記分散剤は、下記一般式(1)で示される構成単位Aを全構成単位中5〜45重量%、下記一般式(2)で示される構成単位Bを全構成単位中50〜90重量%、および、下記一般式(3)で示される構成単位Cを構成単位Bに対する重量比(構成単位C/構成単位B)で0.05〜0.7含有する、共重合体からなる高分子分散剤を含み、
前記セラミック粒子の径が10nm〜300nmであり、
前記高分子分散剤の添加量が、前記セラミック粒子100重量部に対して、0.1〜10重量部である、
セラミック成形体。
上記式(3)において、R9、R10およびR11は同一または異なり、水素原子または炭素数1〜2のアルキル基を示し、X2は酸素原子またはNHを示し、R12およびR13は炭素数1〜30の直鎖、分岐鎖もしくは環状のアルキル基もしくはアルケニル基またはアリール基を示す。 - 積層された複数のセラミックグリーン層および前記セラミックグリーン層間の特定の界面に沿って形成された内部導体膜を備える、生のセラミック積層体を作製する工程と、前記生のセラミック積層体を焼成する工程とを備え、前記生のセラミック積層体に備える前記セラミックグリーン層は、請求項1に記載のセラミック成形体からなる、積層型セラミック電子部品の製造方法。
- 前記生のセラミック積層体を作製する工程は、前記セラミックグリーン層を与える前記セラミック成形体からなる複数のセラミックグリーンシートを作製する工程と、前記複数のセラミックグリーンシートを積み重ねる工程とを備える、請求項2に記載の積層型セラミック電子部品の製造方法。
- 前記生のセラミック積層体を作製する工程は、前記セラミック成形体を構成する前記セラミックスラリーを塗布する工程を繰り返すことによって、積層された複数の前記セラミックグリーン層を形成する工程を備える、請求項2に記載の積層型セラミック電子部品の製造方法。
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JP5316615B2 (ja) * | 2011-09-07 | 2013-10-16 | 株式会社村田製作所 | 積層セラミック電子部品 |
KR101452186B1 (ko) * | 2012-12-26 | 2014-10-21 | 주식회사 누리비스타 | 내부 전극용 페이스트 및 이를 이용하여 제조된 적층형 세라믹 전자 부품 |
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WO2019188775A1 (ja) * | 2018-03-28 | 2019-10-03 | 住友金属鉱山株式会社 | 導電性ペースト、電子部品、及び積層セラミックコンデンサ |
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CN112992431B (zh) * | 2021-04-16 | 2021-08-03 | 西安宏星电子浆料科技股份有限公司 | 多层片式陶瓷电容器用高分散镍内电极浆料及其制备方法 |
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JPH09175869A (ja) * | 1995-12-27 | 1997-07-08 | Lion Corp | セラミックス成形用バインダー |
JP2001114568A (ja) * | 1999-10-18 | 2001-04-24 | Murata Mfg Co Ltd | セラミックグリーンシートの製造方法 |
JP2003104779A (ja) * | 2001-09-28 | 2003-04-09 | Nisshin Chem Ind Co Ltd | 水溶液型セラミックス成形用バインダー |
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