JP5026242B2 - 誘電体材料の製造方法 - Google Patents
誘電体材料の製造方法 Download PDFInfo
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- JP5026242B2 JP5026242B2 JP2007319619A JP2007319619A JP5026242B2 JP 5026242 B2 JP5026242 B2 JP 5026242B2 JP 2007319619 A JP2007319619 A JP 2007319619A JP 2007319619 A JP2007319619 A JP 2007319619A JP 5026242 B2 JP5026242 B2 JP 5026242B2
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/48—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates
- C04B35/49—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates containing also titanium oxides or titanates
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/62605—Treating the starting powders individually or as mixtures
- C04B35/6261—Milling
- C04B35/62615—High energy or reactive ball milling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
- H01B3/12—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances ceramics
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/54—Particle size related information
- C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
- C04B2235/5427—Particle size related information expressed by the size of the particles or aggregates thereof millimeter or submillimeter sized, i.e. larger than 0,1 mm
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/54—Particle size related information
- C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
- C04B2235/5445—Particle size related information expressed by the size of the particles or aggregates thereof submicron sized, i.e. from 0,1 to 1 micron
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Organic Chemistry (AREA)
- Composite Materials (AREA)
- Ceramic Capacitors (AREA)
- Inorganic Insulating Materials (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Description
だ
1次原料粉末として、表1に示すように異なる比表面積のチタン酸バリウムを、固相法を用いて次のとおり調製した。即ち、炭酸バリウム(BaCO3)と酸化チタン(TiO2)とを秤量して、ボールミルに入れ、水を加え湿式で約20時間混合した。そして、得られたスラリーを脱水し、900℃以上の温度で焼成し、チタン酸バリウム(BaTiO3)を合成した。
得られたチタン酸バリウム100重量部に対して、特性調整用の金属化合物として、MgOをMg換算で1.0重量部、Mn3O4をMn換算で0.2重量部、SiO2をSi換算で1.5重量部、Y2O3をY換算で1.0重量部となるように各化合物の粉末を各々秤量して添加し、更にトルエン−エタノール混合溶剤及び分散剤を添加し、混合してスラリーを得た。
粉砕処理によって得られた2次原料粉末のスラリーに、ポリビニルブチラール系有機バインダ及び可塑剤を加えφ0.1mmのPSZからなる玉石を用い、ビーズミルにより粉砕処理を行なった。
各グリーンシート上に、Ni粉末からなる内部電極用の導電ペーストを所定形状にスクリーン印刷した後、導電ペースト膜が形成されたグリーンシートを積層し、熱圧着して一体化し、積層体(グリーンチップ)を作製した。
BET法により比表面積(以下SSAともいう。)を測定した。
2次原料粉末のスラリーをエタノールで希釈した後、堀場製作所製のLA920を用いて粒度分布測定を行い、D99値を記録した。また、得られた2次原料粉末のスラリーを乾燥し、熱処理を加えて粉末にした後、BET法により比表面積を測定した。
得られた積層セラミックコンデンサについて電気特性を測定した。容量変化率は、恒温槽の中に試料を入れ、−55〜85℃の各温度において周波数1kHz、測定電圧0.5Vの条件で静電容量を測定し、25℃の静電容量に対する静電容量の変化を求めることによって算出した。評価基準としては、X5R規格については規格を満足した場合を良好と評価し、比誘電率(25℃)については2000以上を良好と評価した。
2・・・コンデンサチップ体
3・・・積層体層
4・・・内部電極
5・・・外部電極
Claims (3)
- チタン酸バリウムからなる1次原料粉末を粉砕処理して、2次原料粉末を得る工程を備えており、
前記1次原料粉末の比表面積が、6.1〜11.0m2/gであり、
前記2次原料粉末の粒度分布のD99値が、0.35μm以下であり、
前記1次原料粉末に対する前記2次原料粉末の比表面積の増加量が、5.0m2/g以下である誘電体材料の製造方法。 - 前記2次原料粉末は、特性調整のための金属化合物を含有している請求項1記載の誘電体材料の製造方法。
- 請求項1又は2記載の製造方法により得られた誘電体材料の焼結体からなる誘電体層を備えている積層セラミックコンデンサ。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007319619A JP5026242B2 (ja) | 2007-12-11 | 2007-12-11 | 誘電体材料の製造方法 |
KR1020080059283A KR100951317B1 (ko) | 2007-12-11 | 2008-06-23 | 유전체 재료의 제조 방법 및 이를 이용하여 제조된 유전체재료를 포함하는 적층 세라믹 콘덴서 |
Applications Claiming Priority (1)
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---|---|---|---|
JP2007319619A JP5026242B2 (ja) | 2007-12-11 | 2007-12-11 | 誘電体材料の製造方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2009143734A JP2009143734A (ja) | 2009-07-02 |
JP5026242B2 true JP5026242B2 (ja) | 2012-09-12 |
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JP2007319619A Expired - Fee Related JP5026242B2 (ja) | 2007-12-11 | 2007-12-11 | 誘電体材料の製造方法 |
Country Status (2)
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JP (1) | JP5026242B2 (ja) |
KR (1) | KR100951317B1 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP5454294B2 (ja) * | 2010-03-29 | 2014-03-26 | 株式会社村田製作所 | 積層セラミックコンデンサの製造方法 |
KR101141434B1 (ko) | 2010-12-15 | 2012-05-04 | 삼성전기주식회사 | 적층 세라믹 콘덴서 및 그 제조방법 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003306385A (ja) * | 2002-04-11 | 2003-10-28 | Murata Mfg Co Ltd | 複合酸化物粉末の製造方法、複合酸化物粉末および積層セラミック電子部品 |
CN1685454B (zh) * | 2002-10-28 | 2010-06-16 | 株式会社村田制作所 | 层叠陶瓷电容器的制造方法 |
TWI228493B (en) | 2002-12-18 | 2005-03-01 | Showa Denko Kk | Barium titanate and electronic parts using the same |
JP2004297059A (ja) * | 2003-03-12 | 2004-10-21 | Matsushita Electric Ind Co Ltd | セラミック電子部品の製造方法 |
JP2005041730A (ja) * | 2003-07-28 | 2005-02-17 | Murata Mfg Co Ltd | 誘電体セラミック原料粉末の製造方法、誘電体セラミック原料粉末および積層セラミックコンデンサ |
JP4547945B2 (ja) * | 2004-03-11 | 2010-09-22 | Tdk株式会社 | 電子部品、誘電体磁器組成物およびその製造方法 |
KR100674846B1 (ko) * | 2005-03-29 | 2007-01-26 | 삼성전기주식회사 | 유전체용 세라믹분말의 제조방법, 및 그 세라믹분말을이용하여 제조된 적층세라믹커패시터 |
JP2006290675A (ja) * | 2005-04-11 | 2006-10-26 | Matsushita Electric Ind Co Ltd | 誘電体磁器組成物およびそれを用いた積層セラミックコンデンサ |
KR100703080B1 (ko) | 2005-06-24 | 2007-04-06 | 삼성전기주식회사 | 저온 소성용 유전체 분말의 제조 방법과 이를 이용한 적층세라믹 콘덴서의 제조 방법 |
JP2007063040A (ja) * | 2005-08-29 | 2007-03-15 | Tdk Corp | 誘電体磁器組成物の製造方法、および電子部品 |
-
2007
- 2007-12-11 JP JP2007319619A patent/JP5026242B2/ja not_active Expired - Fee Related
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2008
- 2008-06-23 KR KR1020080059283A patent/KR100951317B1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
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JP2009143734A (ja) | 2009-07-02 |
KR20090061556A (ko) | 2009-06-16 |
KR100951317B1 (ko) | 2010-04-05 |
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