JP2007031273A - 低温焼成用の誘電体磁器組成物及びこれを用いた積層セラミックコンデンサ - Google Patents
低温焼成用の誘電体磁器組成物及びこれを用いた積層セラミックコンデンサ Download PDFInfo
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- 239000000203 mixture Substances 0.000 title claims abstract description 65
- 239000000919 ceramic Substances 0.000 title claims abstract description 34
- 229910052573 porcelain Inorganic materials 0.000 title abstract description 3
- 238000010304 firing Methods 0.000 title description 8
- 239000003985 ceramic capacitor Substances 0.000 claims abstract description 41
- 238000005245 sintering Methods 0.000 claims abstract description 24
- 229910001404 rare earth metal oxide Inorganic materials 0.000 claims abstract description 7
- 239000000843 powder Substances 0.000 claims description 36
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 25
- 239000002245 particle Substances 0.000 claims description 18
- 239000003990 capacitor Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 229910000990 Ni alloy Inorganic materials 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims description 3
- 238000001027 hydrothermal synthesis Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000003980 solgel method Methods 0.000 claims description 3
- 150000004703 alkoxides Chemical class 0.000 claims description 2
- 239000007790 solid phase Substances 0.000 claims description 2
- 239000004615 ingredient Substances 0.000 claims 1
- 230000001747 exhibiting effect Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 30
- 238000009413 insulation Methods 0.000 description 10
- 230000008859 change Effects 0.000 description 9
- 230000007423 decrease Effects 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000002002 slurry Substances 0.000 description 8
- 239000011230 binding agent Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 229910010413 TiO 2 Inorganic materials 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- -1 rare earth compounds Chemical class 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 125000005587 carbonate group Chemical group 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 239000011258 core-shell material Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000002003 electrode paste Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000003746 solid phase reaction Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
【解決手段】本発明による誘電体磁器組成物は、主成分として(Ba1−xCax)mTiO3と、副成分としてMgCO3、RE2O3(RE2O3はY2O3、Dy2O3及びHo2O3から成る群から1種以上選択される希土類酸化物)、MO(MはBa及びCaのうち一つの元素)、MnO、V2O5、Cr2O3及び焼結助剤であるSiO2を含む。上記誘電体磁器組成物の組成式はa(Ba1−xCax)mTiO3−bMgCO3−cRE2O3-dMO−eMnO−fSiO2−gV2O5−hCr2O3と表現する際、モル比でa=100、0.1≦b≦3.0、0.1≦c≦3.0、0.1≦d≦3.0、0.05≦e≦1.0、0.2≦f≦3.0、0.01≦g≦1.0、0.01≦h≦1.0であり、0.005≦x≦0.15、0.995≦m≦1.03を満足する。
【選択図】図2
Description
本発明の誘電体磁器組成物はX5R特性(EIA規格;−55〜85℃で容量変化率(ΔC)が±15%以内(基準温度25℃))を示すことができ、焼結後にも誘電体結晶粒子が成長しないため、1μm以下の薄層誘電体シート(誘電体層)を容易に形成させることが出来る。これによって高温絶縁抵抗(Insulation Resistance:IR)等の信頼性特性が優秀である。
図1は本発明の一実施形態による積層セラミックコンデンサを示す断面図である。図1を参照すると、積層セラミックコンデンサ100は誘電体層102と内部電極層101、103が交代で積層された構成のコンデンサ本体110を有する。このコンデンサ本体110の外面には外部電極104、105が形成されており、外部電極104、105に対応される内部電極101、103に各々電気的に接続されている。
102 誘電体層 104、105 外部電極
Claims (12)
- 主成分として(Ba1−xCax)mTiO3及び、
副成分としてMgCO3、RE2O3(RE2O3はY2O3、Dy2O3及びHo2O3から成る群から1種以上選択される希土類酸化物)、MO(MはBa及びCaのうち一つの元素)、MnO、V2O5、Cr2O3及び焼結助剤であるSiO2を含み、
組成式はa(Ba1−xCax)mTiO3−bMgCO3−cRE2O3-dMO−eMnO−fSiO2−gV2O5−hCr2O3と表現する際、モル比でa=100、0.1≦b≦3.0、0.1≦c≦3.0、0.1≦d≦3.0、0.05≦e≦1.0、0.2≦f≦3.0、0.01≦g≦1.0、0.01≦h≦1.0であり、0.005≦x≦0.15、0.995≦m≦1.03を満足することを特徴とする誘電体磁器組成物。 - 前記(Ba1−xCax)mTiO3成分は平均粒径が150ないし400nmである(Ba1−xCax)mTiO3粉末により提供されることを特徴とする請求項1に記載の誘電体磁器組成物。
- 前記(Ba1−xCax)mTiO3成分は固相混合法、水熱合成法またはゾル−ゲル法により製造された(Ba1−xCax)mTiO3粉末により提供されることを特徴とする請求項1に記載の誘電体磁器組成物。
- 前記mとdの和は1.00より大きく1.03よりは小さいことを特徴とする請求項1に記載の誘電体磁器組成物。
- 前記SiO2成分はSiO2粉末により提供されることを特徴とする請求項1に記載の誘電体磁器組成物。
- 前記SiO2成分はSiO2ゾルまたはSiアルコキサイドにより提供されることを特徴とする請求項1に記載の誘電体磁器組成物。
- 誘電体層と内部電極が交代に積層されているコンデンサ本体を含み、
前記誘電体層は、
主成分として(Ba1−xCax)mTiO3と、副成分としてMgCO3、RE2O3(RE2O3はY2O3、Dy2O3及びHo2O3から成る群から1種以上選択される希土類酸化物)、MO(MはBa及びCaのうち一つの元素)、MnO、V2O5、Cr2O3及びSiO2を含む誘電体磁器組成物から成り、
前記誘電体磁器組成物の組成式は、a(Ba1−xCax)mTiO3−bMgCO3−cRE2O3-dMO−eMnO−fSiO2−gV2O5−hCr2O3と表現する際、モル比でa=100、0.1≦b≦3.0、0.1≦c≦3.0、0.1≦d≦3.0、0.05≦e≦1.0、0.2≦f≦3.0、0.01≦g≦1.0、0.01≦h≦1.0であり、0.005≦x≦0.15、0.995≦m≦1.03を満足することを特徴とする積層セラミックコンデンサ。 - 前記内部電極に含有される導電材はNiまたはNi合金であることを特徴とする請求項7に記載の積層セラミックコンデンサ。
- 前記誘電体層の積層数が400以上であることを特徴とする請求項7に記載の積層セラミックコンデンサ。
- 前記誘電体層の厚さは3μm以下であることを特徴とする請求項7に記載の積層セラミックコンデンサ。
- 前記誘電体層の厚さは0.5ないし3μmであることを特徴とする請求項7に記載の積層セラミックコンデンサ。
- 前記誘電体層に含まれた(Ba1−xCax)mTiO3誘電体粒子の平均粒径は150ないし400nmであることを特徴とする請求項7に記載の積層セラミックコンデンサ。
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JP7310077B2 (ja) | 2018-03-28 | 2023-07-19 | サムソン エレクトロ-メカニックス カンパニーリミテッド. | 誘電体組成物及びこれを含む電子部品 |
JP2023020876A (ja) * | 2021-07-30 | 2023-02-09 | コリア アドバンスド インスティチュート オブ サイエンス アンド テクノロジィ | 高誘電率および低誘電損失を有するセラミック誘電体並びにその製造方法 |
JP7485387B2 (ja) | 2021-07-30 | 2024-05-16 | コリア アドバンスド インスティチュート オブ サイエンス アンド テクノロジィ | 多結晶セラミック誘電体およびその製造方法 |
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US7336476B2 (en) | 2008-02-26 |
US20070025060A1 (en) | 2007-02-01 |
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