WO2011036970A1 - 誘電体セラミックおよび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積層セラミックコンデンサ Download PDFInfo
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- WO2011036970A1 WO2011036970A1 PCT/JP2010/064061 JP2010064061W WO2011036970A1 WO 2011036970 A1 WO2011036970 A1 WO 2011036970A1 JP 2010064061 W JP2010064061 W JP 2010064061W WO 2011036970 A1 WO2011036970 A1 WO 2011036970A1
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- 239000000919 ceramic Substances 0.000 title claims abstract description 50
- 239000003985 ceramic capacitor Substances 0.000 title claims abstract description 31
- 229910052692 Dysprosium Inorganic materials 0.000 claims abstract description 6
- 229910052688 Gadolinium Inorganic materials 0.000 claims abstract description 6
- 229910052689 Holmium Inorganic materials 0.000 claims abstract description 6
- 229910052727 yttrium Inorganic materials 0.000 claims abstract description 6
- 239000003990 capacitor Substances 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 16
- 229910052691 Erbium Inorganic materials 0.000 claims description 5
- 229910010252 TiO3 Inorganic materials 0.000 abstract 2
- 238000009413 insulation Methods 0.000 description 15
- 239000002245 particle Substances 0.000 description 8
- 229910004298 SiO 2 Inorganic materials 0.000 description 5
- 239000000843 powder Substances 0.000 description 4
- 238000006467 substitution reaction Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 239000012299 nitrogen atmosphere Substances 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 229910001316 Ag alloy Inorganic materials 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000007606 doctor blade method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 1
- 229910052702 rhenium Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
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- 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
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Definitions
- the present invention relates to a dielectric ceramic and a multilayer ceramic capacitor, and in particular, a dielectric ceramic suitable for use in a multilayer ceramic capacitor used in a high-temperature environment such as in a vehicle, and configured using the same.
- the present invention relates to a multilayer ceramic capacitor.
- the main component of the dielectric ceramic constituting the dielectric ceramic layer included in the multilayer ceramic capacitor is described in, for example, JP-A-2006-199534 (Patent Document 1) ( Ba, Ca) TiO 3 series materials are used.
- the dielectric ceramic described in Patent Document 1 described above has a problem that the insulation resistivity is likely to decrease. Further, when the insulation resistivity is increased, the dielectric constant is lowered, and there is a problem that it is difficult to achieve both the insulation resistivity and the dielectric constant.
- an object of the present invention is to provide a dielectric ceramic that can solve the above-described problems, that is, a dielectric ceramic that is suitable for use in a multilayer ceramic capacitor that is used in a high-temperature environment such as a vehicle. Is to try.
- Another object of the present invention is to provide a multilayer ceramic capacitor constructed using the above-described dielectric ceramic.
- the dielectric ceramic according to the present invention is: It has a composition represented by the composition formula: (1-x) (Ba 1-y Ca y ) TiO 3 + xCaTiO 3 + eSiO 2 , and 0.001 ⁇ x ⁇ 0.02 and 0.08 ⁇ y ⁇ 0.20 While satisfying each condition of When (e) is expressed as a molar part when (1-x) (Ba 1-y Ca y ) TiO 3 + xCaTiO 3 is 1 mol, 0.01 ⁇ e ⁇ 0.04 It is characterized by satisfying the following conditions.
- the dielectric ceramic according to the present invention is, in a preferred embodiment, Composition formula: (1-x) (Ba 1-y Ca y ) m TiO 3 + xCaTiO 3 + aRe 2 O 3 + bMgO + cMnO + dV 2 O 3 + eSiO 2 (Re is selected from Gd, Dy, Y, Ho and Er) And at least one kind) 0.001 ⁇ x ⁇ 0.02, 0.08 ⁇ y ⁇ 0.20, and 0.99 ⁇ m ⁇ 1.05 While satisfying each condition of When (1-x) (Ba 1-y Ca y ) m TiO 3 + xCaTiO 3 is 1 mole, a, b, c, d, and e are respectively expressed as mole parts.
- CaTiO 3 exists mainly independently of the (Ba, Ca) TiO 3 main phase particles, but the existence forms thereof are secondary phase particles, grain boundaries, triple points. There is no particular limitation.
- the present invention also includes a capacitor body comprising a plurality of laminated dielectric ceramic layers and a plurality of internal electrodes formed along a specific interface between the dielectric ceramic layers, and an outer surface of the capacitor body. And a plurality of external electrodes that are formed at different positions and are electrically connected to a specific one of the internal electrodes.
- the multilayer ceramic capacitor according to the present invention is characterized in that the dielectric ceramic layer is made of the above-described dielectric ceramic according to the present invention.
- the dielectric ceramic according to the present invention reliability at high temperature is high, and CaTiO 3 is added within a predetermined range, so that the insulation resistivity is log ⁇ (the unit of ⁇ is “ ⁇ ⁇ m”).
- a dielectric constant of 1000 or more can be obtained while increasing to 10 or more.
- This value is a notable value for a material composition for high temperature assurance having a large Ca substitution amount (y) of 0.08 or more. This is because, by adding a predetermined amount of CaTiO 3 , the Ca concentration at the grain boundary is stabilized, and the movement of the Ca component between the (Ba, Ca) TiO 3 particles as the main phase particles is suppressed. This is presumed to be due to less variation in Ca concentration between particles.
- a dielectric ceramic having a lifetime as high as 20 hours or more can be obtained.
- the dielectric ceramic according to the present invention to a multilayer ceramic capacitor, excellent high temperature load reliability can be ensured. Therefore, the multilayer ceramic capacitor can be made suitable for in-vehicle use.
- FIG. 1 is a cross-sectional view schematically showing a multilayer ceramic capacitor 1 configured using a dielectric ceramic according to the present invention. It is a figure which shows the XRD chart of the ceramic sintered compact concerning the sample 14 produced in Experimental example 1.
- FIG. 1 shows the XRD chart of the ceramic sintered compact concerning the sample 14 produced in Experimental example 1.
- FIG. 1 is a cross-sectional view schematically showing a multilayer ceramic capacitor 1 constructed using a dielectric ceramic according to the present invention.
- the multilayer ceramic capacitor 1 includes a capacitor body 2.
- the capacitor body 2 includes a plurality of dielectric ceramic layers 3 to be stacked, and a plurality of internal electrodes 4 and 5 formed along a plurality of specific interfaces between the plurality of dielectric ceramic layers 3, respectively.
- the internal electrodes 4 and 5 are formed so as to reach the outer surface of the capacitor body 2.
- the electrodes 5 are alternately arranged inside the capacitor body 2.
- External electrodes 8 and 9 are formed on the outer surface of the capacitor body 2 and on the end surfaces 6 and 7 so as to be electrically connected to the internal electrodes 4 and 5, respectively.
- materials for these external electrodes 8 and 9 Ni, Ni alloy, Cu, Cu alloy, Ag, Ag alloy, or the like can be used.
- the external electrodes 8 and 9 are usually formed by applying a conductive paste obtained by adding glass frit to a metal powder on both end faces 6 and 7 of the capacitor body 2 and baking it.
- a first plating film made of Ni, Cu or the like is formed on the external electrodes 8 and 9, and a second plating film made of solder, Sn, or the like is further formed thereon. Is done.
- the dielectric ceramic layer 3 is composed of a dielectric ceramic having a composition represented by the composition formula: (1-x) (Ba 1-y Ca y ) TiO 3 + xCaTiO 3 + eSiO 2.
- the In the above composition formula 0.001 ⁇ x ⁇ 0.02 and 0.08 ⁇ y ⁇ 0.20 While satisfying each condition of When (e) is expressed as a molar part when (1-x) (Ba 1-y Ca y ) TiO 3 + xCaTiO 3 is 1 mol, 0.01 ⁇ e ⁇ 0.04 Satisfy the condition of
- the dielectric constant is increased to 1000 or more while increasing the insulation resistivity to 10 or more by log ⁇ (the unit of ⁇ is “ ⁇ ⁇ m”). Obtainable. This is because, by adding a predetermined amount of CaTiO 3 , the Ca concentration at the grain boundary is stabilized, and the movement of the Ca component between the (Ba, Ca) TiO 3 particles as the main phase particles is suppressed, and the Ca concentration particles This is presumed to be due to less variation in the interval.
- Mn, V, Re is at least one selected from Gd, Dy, Y, Ho, and Er.
- Re is at least one selected from Gd, Dy, Y, Ho, and Er.
- the dielectric ceramic layer 3 preferably has a composition represented by the composition formula: (1-x) (Ba 1-y Ca y ) m TiO 3 + xCaTiO 3 + aRe 2 O 3 + bMgO + cMnO + dV 2 O 3 + eSiO 2 (Re is at least one selected from Gd, Dy, Y, Ho, and Er.).
- composition formula 0.001 ⁇ x ⁇ 0.02, 0.08 ⁇ y ⁇ 0.20, and 0.99 ⁇ m ⁇ 1.05 While satisfying each condition of When (1-x) (Ba 1-y Ca y ) m TiO 3 + xCaTiO 3 is 1 mole, a, b, c, d, and e are respectively expressed as mole parts. 0.01 ⁇ a ⁇ 0.04, 0.005 ⁇ b ⁇ 0.035, 0 ⁇ c ⁇ 0.01, 0 ⁇ d ⁇ 0.01, and 0.01 ⁇ e ⁇ 0.04 Satisfy each condition of
- the dielectric ceramic having the above composition further satisfies the X8R characteristic of the EIA standard, and the high-temperature load reliability is an average failure when a DC voltage of 175 ° C. and an electric field strength of 30 V / mm is applied.
- the lifetime can be as high as 20 hours or more.
- the illustrated multilayer ceramic capacitor 1 is a two-terminal type including two external electrodes 8 and 9, it can also be applied to a multi-terminal type multilayer ceramic capacitor.
- a polyvinyl butyral binder and an organic solvent such as ethanol were added to the raw material powder, and wet mixed by a ball mill to prepare a ceramic slurry.
- this ceramic slurry was formed into a sheet by a doctor blade method to obtain a ceramic green sheet.
- a conductive paste mainly composed of Ni was printed on the ceramic green sheet to form a conductive paste film serving as an internal electrode.
- this raw capacitor body was heated at a temperature of 350 ° C. in an N 2 atmosphere to burn the binder, and then H 2 —N 2 —H 2 with an oxygen partial pressure of 10 ⁇ 10 to 10 ⁇ 12 MPa.
- the capacitor body was sintered at a temperature shown in Table 1 for 2 hours to sinter the capacitor body.
- a silver paste containing B 2 O 3 —SiO 2 —BaO glass frit is applied to both end faces of the sintered capacitor body and baked at a temperature of 600 ° C. in an N 2 atmosphere, An external electrode connected to was formed to obtain a multilayer ceramic capacitor as a sample.
- the outer dimensions of the multilayer ceramic capacitor thus obtained are 1.0 mm wide, 2.0 mm long and 0.5 mm thick, and the thickness of the dielectric ceramic layer interposed between the internal electrodes is 3 ⁇ m. there were.
- the number of effective dielectric ceramic layers was 5, and the opposing area of the internal electrodes per layer was 1.3 ⁇ 10 ⁇ 6 m 2 .
- an electrostatic voltage (C) and a dielectric loss (tan ⁇ ) were applied by applying an AC voltage of 1 V rms and 1 kHz at 25 ° C. using an automatic bridge type measuring instrument.
- the relative dielectric constant ( ⁇ ) was calculated from the measured C, the area of the internal electrode, and the thickness of the dielectric ceramic layer.
- the insulation resistance (R) was measured by applying a DC voltage of 15 kV / mm for 2 minutes at 25 ° C. using an insulation resistance meter. Based on the obtained R and the structure of the multilayer ceramic capacitor, the insulation resistivity ( ⁇ ) was calculated.
- the insulation resistivity is less than 10 in log ⁇ .
- ⁇ is less than 1000.
- FIG. 2 shows an XRD chart of the ceramic sintered body according to the sample 14 within the scope of the present invention.
- the part indicated by the arrow is the peak of CaTiO 3 .
- the main large peaks are all (Ba, Ca) TiO 3 peaks.
- a peak of CaTiO 3 added in a trace amount appears.
- the insulation resistivity is less than 10 in log ⁇ .
- ⁇ is less than 1000.
- the relative dielectric constant ( ⁇ ) and the insulation resistivity ( ⁇ ) were determined in the same manner as in Experimental Example 1 for the obtained multilayer ceramic capacitors according to each sample.
- the capacitance was measured while changing the temperature within the range of ⁇ 55 ° C. to 150 ° C., and the change with respect to the capacitance where the absolute value of the change was the maximum based on the capacitance at 25 ° C.
- the ratio (“150 ° C. TCC”) was determined, and it was determined whether or not the X8R characteristic of the EIA standard was satisfied (“X8R determination”).
- X8R determination those satisfying the X8R characteristics are indicated by “ ⁇ ”, and those not satisfying are indicated by “X”.
- the insulation resistivity is 10 or more in log ⁇ (the unit of ⁇ is “ ⁇ ⁇ m”), and ⁇ of 1000 or more.
- An MTTF of 20 hours or more was obtained, the 150 ° C. TCC was within ⁇ 15%, and the X8R determination was passed.
- the MTTF was less than 20 hours.
- the MTTF was less than 20 hours.
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Abstract
Description
組成式:(1-x)(Ba1-yCay)TiO3+xCaTiO3+eSiO2で表わされる組成を有し、かつ、
0.001≦x≦0.02、および
0.08≦y≦0.20
の各条件を満たすとともに、
(1-x)(Ba1-yCay)TiO3+xCaTiO3を1モルとしたときのモル部でeを表わしたとき、
0.01≦e≦0.04
の条件を満たすことを特徴としている。
組成式:(1-x)(Ba1-yCay)mTiO3+xCaTiO3+aRe2O3+bMgO+cMnO+dV2O3+eSiO2で表わされる組成(Reは、Gd、Dy、Y、HoおよびErから選ばれる少なくとも1種。)を有し、かつ、
0.001≦x≦0.02、
0.08≦y≦0.20、および
0.99≦m≦1.05
の各条件を満たすとともに、
(1-x)(Ba1-yCay)mTiO3+xCaTiO3を1モルとしたときのモル部でa、b、c、dおよびeをそれぞれ表わしたとき、
0.01≦a≦0.04、
0.005≦b≦0.035、
0≦c≦0.01、
0≦d≦0.01、および
0.01≦e≦0.04
の各条件を満たすことを特徴としている。
0.001≦x≦0.02、および
0.08≦y≦0.20
の各条件を満たすとともに、
(1-x)(Ba1-yCay)TiO3+xCaTiO3を1モルとしたときのモル部でeを表わしたとき、
0.01≦e≦0.04
の条件を満たす。
0.001≦x≦0.02、
0.08≦y≦0.20、および
0.99≦m≦1.05
の各条件を満たすとともに、
(1-x)(Ba1-yCay)mTiO3+xCaTiO3を1モルとしたときのモル部でa、b、c、dおよびeをそれぞれ表わしたとき、
0.01≦a≦0.04、
0.005≦b≦0.035、
0≦c≦0.01、
0≦d≦0.01、および
0.01≦e≦0.04
の各条件を満たす。
Ca置換量が表1に示す「y」に調整された(Ba1-yCay)TiO3を用意するとともに、CaTiO3、MnOおよびSiO2を用意し、これらを、(1-x)(Ba1-yCay)TiO3+xCaTiO3+cMnO+eSiO2の組成式における「x」、「c」および[e」が表1に示す数値となるように秤量し、混合した原料粉末を用意した。ここで、「c」および「e」は、(1-x)(Ba1-yCay)TiO3+xCaTiO3を1モルとしたときのモル部を示している。
0.001≦x≦0.02、
0.08≦y≦0.20
0≦c≦0.01、および
0.01≦e≦0.04
の各条件を満たしている。これら試料3~9、12~18および21~24によれば、絶縁抵抗率がlogρ(ρの単位は「Ω・m」)で10以上となり、かつ1000以上のεが得られた。
(Ba,Ca)/Ti比「m」が表2に示すように調整された(Ba0.89Ca0.11)mTiO3を用意するとともに、CaTiO3、Y2O3、Gd2O3、Dy2O3、Ho2O3、Er2O3、MgO、V2O3およびSiO2を用意し、これらを、(1-x)(Ba0.89Ca0.11)mTiO3+xCaTiO3+aRe2O3+bMgO+cMnO+dV2O3+eSiO2の組成式における「m」、[a」、「b」、「c」、「d」および[e」が表2に示す数値となるように秤量し、混合した原料粉末を用意した。ここで、「a」、「b」、「c」、「d」および「e」は、(1-x)(Ba0.89Ca0.11)mTiO3+xCaTiO3を1モルとしたときのモル部を示している。
0.001≦x≦0.02、
0.08≦y≦0.20、
0.99≦m≦1.05、
0.01≦a≦0.04、
0.005≦b≦0.035、
0≦c≦0.01、
0≦d≦0.01、および
0.01≦e≦0.04
の各条件を満たしている。これら試料102~107、110~113、115~118、120~122および124~128によれば、絶縁抵抗率がlogρ(ρの単位は「Ω・m」)で10以上となり、1000以上のεが得られ、20時間以上のMTTFが得られ、150℃TCCが±15%以内であり、X8R判定を合格した。
2 コンデンサ本体
3 誘電体セラミック層
4,5 内部電極
8,9 外部電極
Claims (3)
- 組成式:(1-x)(Ba1-yCay)TiO3+xCaTiO3+eSiO2で表わされる組成を有し、かつ、
0.001≦x≦0.02、および
0.08≦y≦0.20
の各条件を満たすとともに、
(1-x)(Ba1-yCay)TiO3+xCaTiO3を1モルとしたときのモル部でeを表わしたとき、
0.01≦e≦0.04
の条件を満たす、
誘電体セラミック。 - 組成式:(1-x)(Ba1-yCay)mTiO3+xCaTiO3+aRe2O3+bMgO+cMnO+dV2O3+eSiO2で表わされる組成(Reは、Gd、Dy、Y、HoおよびErから選ばれる少なくとも1種。)を有し、かつ、
0.001≦x≦0.02、
0.08≦y≦0.20、および
0.99≦m≦1.05
の各条件を満たすとともに、
(1-x)(Ba1-yCay)mTiO3+xCaTiO3を1モルとしたときのモル部でa、b、c、dおよびeをそれぞれ表わしたとき、
0.01≦a≦0.04、
0.005≦b≦0.035、
0≦c≦0.01、
0≦d≦0.01、および
0.01≦e≦0.04
の各条件を満たす、
誘電体セラミック。 - 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が請求項1または2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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JP2015180587A (ja) * | 2014-03-04 | 2015-10-15 | Tdk株式会社 | 誘電体組成物 |
JP2015180589A (ja) * | 2014-03-04 | 2015-10-15 | Tdk株式会社 | 誘電体組成物 |
JP2015180588A (ja) * | 2014-03-04 | 2015-10-15 | Tdk株式会社 | 誘電体組成物 |
KR20210014575A (ko) * | 2019-07-29 | 2021-02-09 | 삼성전기주식회사 | 유전체 및 이를 포함하는 적층 세라믹 커패시터 |
US11476048B2 (en) | 2019-07-29 | 2022-10-18 | Samsung Electro-Mechanics Co., Ltd. | Dielectric material and multilayer ceramic capacitor including the same |
US11791098B2 (en) * | 2020-12-16 | 2023-10-17 | Samsung Electro-Mechanics Co., Ltd. | Dielectric and multilayer capacitor including the same |
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Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2001031469A (ja) * | 1999-07-19 | 2001-02-06 | Murata Mfg Co Ltd | 誘電体セラミックおよび積層セラミック電子部品 |
JP2001220225A (ja) * | 1999-12-01 | 2001-08-14 | Tdk Corp | 誘電体磁器組成物の製造方法 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JP3562085B2 (ja) * | 1995-12-28 | 2004-09-08 | 松下電器産業株式会社 | 誘電体磁器組成物及びそれを用いたコンデンサ並びに誘電体磁器組成物の製造方法 |
CN1109005C (zh) | 1999-10-05 | 2003-05-21 | Tdk株式会社 | 介电陶瓷组合物的制备方法 |
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KR100811454B1 (ko) | 2004-08-19 | 2008-03-10 | 가부시키가이샤 무라타 세이사쿠쇼 | 유전체 세라믹 및 적층 세라믹 커패시터 |
WO2006035535A1 (ja) * | 2004-09-28 | 2006-04-06 | Murata Manufacturing Co., Ltd | 誘電体セラミック、誘電体セラミックの製造方法、及び積層セラミックコンデンサ |
JP4622537B2 (ja) | 2005-01-20 | 2011-02-02 | Tdk株式会社 | 誘電体磁器組成物および電子部品 |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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JP2015180587A (ja) * | 2014-03-04 | 2015-10-15 | Tdk株式会社 | 誘電体組成物 |
JP2015180589A (ja) * | 2014-03-04 | 2015-10-15 | Tdk株式会社 | 誘電体組成物 |
JP2015180588A (ja) * | 2014-03-04 | 2015-10-15 | Tdk株式会社 | 誘電体組成物 |
KR20210014575A (ko) * | 2019-07-29 | 2021-02-09 | 삼성전기주식회사 | 유전체 및 이를 포함하는 적층 세라믹 커패시터 |
JP2021020830A (ja) * | 2019-07-29 | 2021-02-18 | 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. | 誘電体磁器組成物 |
US11476048B2 (en) | 2019-07-29 | 2022-10-18 | Samsung Electro-Mechanics Co., Ltd. | Dielectric material and multilayer ceramic capacitor including the same |
JP7327735B2 (ja) | 2019-07-29 | 2023-08-16 | 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. | 誘電体磁器組成物 |
KR102789005B1 (ko) | 2019-07-29 | 2025-04-01 | 삼성전기주식회사 | 유전체 및 이를 포함하는 적층 세라믹 커패시터 |
US11791098B2 (en) * | 2020-12-16 | 2023-10-17 | Samsung Electro-Mechanics Co., Ltd. | Dielectric and multilayer capacitor including the same |
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