WO2000048963A1 - Composition ceramique dielectrique, son emploi dans un condensateur et son procede de fabrication - Google Patents
Composition ceramique dielectrique, son emploi dans un condensateur et son procede de fabrication Download PDFInfo
- Publication number
- WO2000048963A1 WO2000048963A1 PCT/JP2000/000844 JP0000844W WO0048963A1 WO 2000048963 A1 WO2000048963 A1 WO 2000048963A1 JP 0000844 W JP0000844 W JP 0000844W WO 0048963 A1 WO0048963 A1 WO 0048963A1
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- WIPO (PCT)
- Prior art keywords
- mol
- moles
- terms
- barium titanate
- dielectric
- Prior art date
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- 239000003990 capacitor Substances 0.000 title claims abstract description 34
- 239000000203 mixture Substances 0.000 title claims abstract description 29
- 239000000919 ceramic Substances 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 229910002113 barium titanate Inorganic materials 0.000 claims abstract description 41
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052802 copper Inorganic materials 0.000 claims abstract description 8
- 239000010949 copper Substances 0.000 claims abstract description 8
- 239000010953 base metal Substances 0.000 claims abstract description 7
- 239000010936 titanium Substances 0.000 claims abstract description 7
- 150000001875 compounds Chemical class 0.000 claims description 13
- 238000010304 firing Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 239000003989 dielectric material Substances 0.000 claims description 9
- 238000002441 X-ray diffraction Methods 0.000 claims description 6
- 229910052692 Dysprosium Inorganic materials 0.000 claims description 5
- 238000001354 calcination Methods 0.000 claims description 5
- 229910052573 porcelain Inorganic materials 0.000 claims description 4
- 229910052689 Holmium Inorganic materials 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052788 barium Inorganic materials 0.000 claims 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims 1
- JUWGUJSXVOBPHP-UHFFFAOYSA-B titanium(4+);tetraphosphate Chemical compound [Ti+4].[Ti+4].[Ti+4].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O JUWGUJSXVOBPHP-UHFFFAOYSA-B 0.000 claims 1
- 238000009413 insulation Methods 0.000 abstract description 38
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- NLQFUUYNQFMIJW-UHFFFAOYSA-N dysprosium(III) oxide Inorganic materials O=[Dy]O[Dy]=O NLQFUUYNQFMIJW-UHFFFAOYSA-N 0.000 abstract 1
- AMWRITDGCCNYAT-UHFFFAOYSA-L manganese oxide Inorganic materials [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 14
- 230000000694 effects Effects 0.000 description 14
- 230000006866 deterioration Effects 0.000 description 13
- 239000012298 atmosphere Substances 0.000 description 10
- 239000011521 glass Substances 0.000 description 10
- 238000005245 sintering Methods 0.000 description 9
- 229910052759 nickel Inorganic materials 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 230000002542 deteriorative effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000012071 phase Substances 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 4
- 239000004332 silver Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- -1 1.0 mol of D y 2 0 3 Chemical compound 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- DKPFZGUDAPQIHT-UHFFFAOYSA-N butyl acetate Chemical compound CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 239000003985 ceramic capacitor Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000007772 electrode material Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 102100030762 Apolipoprotein L1 Human genes 0.000 description 1
- 101100237637 Bos taurus APOL gene Proteins 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 241000257465 Echinoidea Species 0.000 description 1
- 101100323521 Homo sapiens APOL1 gene Proteins 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007606 doctor blade method Methods 0.000 description 1
- 239000002003 electrode paste Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000000075 oxide glass Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 1
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000012798 spherical particle Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/018—Dielectrics
- H01G4/06—Solid dielectrics
- H01G4/08—Inorganic dielectrics
- H01G4/12—Ceramic dielectrics
- H01G4/1209—Ceramic dielectrics characterised by the ceramic dielectric material
- H01G4/1218—Ceramic dielectrics characterised by the ceramic dielectric material based on titanium oxides or titanates
- H01G4/1227—Ceramic dielectrics characterised by the ceramic dielectric material based on titanium oxides or titanates based on alkaline earth titanates
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- 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
- C04B35/46—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 titanium oxides or titanates
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- C04B35/462—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 titanium oxides or titanates based on titanates
- C04B35/465—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 titanium oxides or titanates based on titanates based on alkaline earth metal titanates
- C04B35/468—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 titanium oxides or titanates based on titanates based on alkaline earth metal titanates based on barium titanates
- C04B35/4682—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 titanium oxides or titanates based on titanates based on alkaline earth metal titanates based on barium titanates based on BaTiO3 perovskite phase
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Definitions
- the present invention relates to a dielectric ceramic composition used for a dielectric layer of a multilayer ceramic capacitor having an internal electrode layer made of a base metal such as nickel, a capacitor using the same, and a method of manufacturing the same.
- the dielectric layer includes a rare earth oxide such as Dy 2 0 3 in BAT i0 3, the main component containing Co 2 0 3, BaO as an auxiliary component, MnO, MgO, and A 1 2 0 3, L i 2 0- (S i, T i ) were those containing the oxide glass mainly composed of an a 1 2 0 3.
- the present invention provides a dielectric ceramic composition capable of obtaining a multilayer capacitor having a high insulation resistance without reducing a dielectric layer even when an external electrode is formed using a base metal such as copper, and a capacitor using the same. It is intended to provide a manufacturing method thereof.
- At least Mg as an auxiliary component is converted to MgO as 0 based on 100 mol of barium titanate as a main component. 5 to 5.0 mol, 0.1 to 3 in terms of Dy to Dy 2 0 3. 0 mol, 0. in terms of Mn to Mn0 4/3 01 ⁇ 0. 4 mol, the V V 2 0 5 in terms of 0.01 to 0.26 mol, 31 in terms of 510 2 0.3 to 3.5 mol, in terms of a 1 to a 1 2 ⁇ 3 from 0.01 to 3.0 And the molar ratio of BaTi is 1.001 to 1.05.
- the dielectric composition of the present invention is obtained by increasing the molar ratio of 8 & 1 to 1.001 to 1.05, which is larger than 1, and replacing a part of tetravalent Ti with pentavalent V.
- the generated cation vacancies compensate for oxygen defects during firing. As a result, it is possible to prevent Ti ⁇ 2 from being reduced and to prevent the insulation resistance of the dielectric composition from decreasing.
- FIG. 1 is a sectional view of a laminated capacitor according to an embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION
- barium titanate shown in Table 1 was prepared.
- the * mark indicates the composition of the comparative example.
- the mixed material was crushed, put into an alumina crucible, and kept at a temperature of 1100 for 2 hours and calcined. This calcination is performed at a temperature at which the metal carbonate is decomposed and the main component, barium titanate, and the subcomponents react appropriately.
- the calcined raw material was subjected to wet pulverization in a pole mill so that the average particle size became 1.0 im or less, and then dried to obtain a dielectric material.
- a polyvinyl butyral resin as a binder, n-butyl acetate as a solvent, and dibutyl fluorate as a plasticizer were added to the dielectric material, and mixed with a zirconia ball in a ball mill for 72 hours to prepare a slurry.
- a ceramic sheet was produced by a doctor blade method. This ceramic sheet was manufactured to have a thickness of 14 nm after firing. This ceramic sheet is to be a dielectric layer 10 of a capacitor described later.
- an internal electrode paste containing Nigel as a main component was screen-printed on the surface of the ceramic sheet, and dried to form an internal electrode material layer.
- 10 ceramic sheets with the internal electrode material layer are stacked and thermocompression bonded, then 3.3 mm long and 1. It was cut into 7 mm laminates.
- the laminate is placed in an alumina-based layer (firing vessel), and organic substances are burned off in an atmosphere in which nickel is not excessively oxidized.
- the temperature is raised continuously, and the mixture is kept at a maximum temperature of 122 to 140 for 2 hours in a reducing atmosphere composed of a mixture of carbon dioxide or water vapor with nitrogen and hydrogen to sinter the laminate.
- the atmosphere conditions for sintering are such that nickel is not excessively oxidized and the dielectric layer 10 can be sintered.
- the dielectric layer 100 is fired in a reducing atmosphere composed of nitrogen and hydrogen using carbon dioxide gas or water vapor for 800 hours to 1200 in the temperature decreasing process for one hour, and the dielectric layer 100 reduced during sintering is formed. Is re-oxidized.
- the conditions of the reducing atmosphere are such that nickel is not excessively oxidized. Then, it was cooled to room temperature to produce a sintered body.
- the firing temperature of the sintered body was a temperature at which the density of the sintered body of the dielectric layer 10 was maximized in accordance with each dielectric material composition.
- capacitor of the present invention is the dielectric constant of the initial performance as high as 200 0 or more, and as high as 1 X 10 12 ⁇ or more even insulation resistance, even after the life test, recognized insulation deterioration I can't.
- barium titanate having a specific surface area of 2 to 5 m 2 Zg is preferably used.
- barium titanate that does not have a (002) plane and a (200) plane peak (with no split peak) at an X-ray diffraction angle of 20 to 40 ° has a large capacity temperature change rate at high temperatures. There is a tendency.
- barium titanate in which the X-ray diffraction angle 20 at 40 to 50 ° is divided into peaks of the (002) plane and the (200) plane.
- barium titanate has a BaZT i molar ratio of 1.000, a specific surface area of 3.3 m 2 Zg, and an X-ray diffraction angle of 20 at 40 to 50 ° with two peaks of the (002) plane and the (200) plane.
- the dielectric constant, the dielectric loss tangent (t an ⁇ ), calculated from the capacitance at 1 KHz at 20 (room temperature), and the rate of change for the capacitance at 20 between -55 and -10125 "C The results are shown in Table 4.
- the insulation resistance (IR) when a DC voltage of 25 V was applied at room temperature and the voltage of 200 V DC after continuous application for 250 hours under the temperature of 125 Table 4 also shows the insulation resistance degradation status of the capacitors (IRs that have deteriorated to 1 X 10 7 ⁇ or less were counted as failures) .As is clear from Table 4, the initial performance of the capacitor of the present invention was The dielectric constant is as high as 2000 or more, the insulation resistance is as high as 1 ⁇ 10 12 ⁇ or more, and there is no deterioration in insulation after the accelerated life test.
- the addition of MgO has the effect of improving the sinterability of the dielectric layer 10 and improving the insulation resistance.
- the amount of 1 ⁇ 10 added is less than 0.5 mol, the sintering becomes insufficient, and if it exceeds 5.0 mol, the temperature change rate of the capacitance becomes large. Become. Therefore, it is preferable to add 0.5 to 5.0 moles of Mg to 100 moles of barium titanate in terms of Mg 0.
- the addition of Dy 2 ⁇ 3 prevents the reduction of T I_ ⁇ 2, to improve insulation resistance, has the effect of satisfying the capacitance-temperature characteristic, the electrical characteristics such as t an, [delta].
- Dy 2 ⁇ 3 added amount is 0.1 less than 1 mole of In this case, the rate of change in capacitance with temperature increases and ta ⁇ ⁇ increases.
- the D y 2 0 amount of 3 exceeds 3.0 mol the dielectric constant is eliminated practical drops below 2000.
- Dy is in terms of Dy 2 0 3, against the 100 moles of barium titanate, 0.1 to 3.0 mol is preferably added.
- the Dy 2 0 3, is by using a specific surface area of 7 ⁇ 15m 2 Zg, improved dispersibility, the effect becomes more pronounced.
- Mn0 4/3 can prevent reduction of T i 0 2. Even if a large amount of the laminate is fired in a neutral atmosphere or a reducing atmosphere, the effect of preventing the insulation resistance from deteriorating, suppressing the variation in capacitance, and obtaining a homogeneous sintered body can be obtained. is there. However addition amount 0.01 mol less than the sintered body of Mn_ ⁇ 4/3 partially semiconductive to insulating resistance is lowered, also insulation resistance deteriorates considerably in accelerated life test. The temperature-dependent variation in the capacitance when the amount of Mn0 4/3 exceeds 0.4 mol, aging rate increase, also increased deterioration of the insulation resistance. Accordance connection Mn is in terms of Mn0 4/3, 0. to 100 mol of barium titanate 01 to 0.4 molar are preferably added.
- V 2 0 5 suppresses the reduction of T i 0 2, has the effect of preventing the deterioration of the high and the insulation resistance Insulation resistance.
- V 2 0 5 added amount is more than 0.26 mole, the temperature change rate of capacitance becomes large, the insulation resistance is deteriorated Mau.
- V 2 0 5 added amount and the insulation resistance is small less than 0.01 mol, deteriorated in the acceleration test. Therefore, it is preferable to add V in an amount of 0.01 to 0.26 mol per 100 mol of barium titanate.
- the BaO- S i 0 2 - Addition of A 1 2 0 3 based glass facilitates sintering of Oite dielectric layer 10 in the firing of a relatively low temperature, to reduce the capacitance, the variation of the insulation resistance Has an effect. However, if the added amount is less than 0.6 mol, the sintering of the dielectric layer 10 becomes insufficient. If the amount exceeds 5.0 mol, the sinterability of the dielectric layer 10 will improve. However, the dielectric constant decreases, and the temperature change rate of the capacitance increases, which is not practical.
- a 1 2 ⁇ 3 based glass 0.5 with respect to the hand with respect to 100 moles of barium titanate 6-5 0 mol is preferably added.
- barium titanate had a BaZT i molar ratio of 1.000, a specific surface area of 3.3 m 2 Zg, and an X-ray diffraction angle 20 at 40 to 50 ° of which the peaks of the (002) plane and the (200) plane were.
- the X-ray diffraction angle 2 at a specific surface area of 2 to 5 m 2 / g and 40 to 50 ° is divided into two peaks of the (002) plane and the (200) plane.
- the same effect can be obtained when barium titanate is used such that the molar ratio of BaZT i in the dielectric material is 1.001 to 1.05.
- DyZ (Dy + Ho) molar ratio is 0.3 to .9'll become a sea urchin Dy 2 0 3 and Ho 2 0 3 and the combined 0.1 to 3.0 mol per mol of Therefore, even if the thickness of the dielectric layer 10 is reduced to 5 // m or less, a high insulation resistance can be obtained, the insulation resistance does not deteriorate even in the accelerated life test, and the capacitance temperature change rate does not change. A small laminated capacitor was obtained. The reason will be described. Dy has an effect of preventing the insulation resistance from deteriorating, but when the dielectric layer 10 is made thinner, the temperature characteristic of the capacitance tends to deteriorate.
- Dy has an effect of improving temperature characteristics by being added to the dielectric ceramic composition of the present invention. Therefore, by adding both Dy and Ho with an appropriate composition, a multilayer capacitor having high capacitance-temperature characteristics and high insulation resistance can be obtained even if the dielectric layer 10 is made thin.
- DyZ (Dy + Ho) molar ratio is less than 0.3, deterioration of the insulation resistance is accelerated, and if it exceeds 0.9, the temperature change rate of the capacitance becomes large.
- the total amount of Dy 2 ⁇ 3 and Ho 2 ⁇ 3 is less than 0.1 mol, the rate of change in capacitance with temperature increases and ta ⁇ ⁇ increases.
- the total amount exceeds 3.0 mol, the dielectric constant is lowered to 2000 or less, which is not practical. Therefore to Dy 2 0 3 and Ho 2 ⁇ 3 Total amount added to 100 moles of barium titanate, 0.1 to 3. Is preferably 0 mol.
- a multilayer capacitor was manufactured under the same conditions as in Example 1 except that the thickness of the dielectric layer 10 was 3 ixm.
- the use of Mg (OH) 2 as the Mg compound further improves the temperature characteristics of the capacitance as compared to the case of using MgO, and is also effective in preventing the deterioration of the insulation resistance. There is.
- Mg (OH) 2 synthesized by a gas phase method has a spherical particle shape and is unlikely to form secondary aggregates, so that the dispersibility in a dielectric material is improved.
- the dielectric porcelain composition of the present invention easily forms a secondary phase.
- the mechanical strength of the multilayer capacitor may be deteriorated.
- the amount of A 1 2 0 3 in order to improve the mechanical strength without deteriorating the characteristics arbitrariness preferred that a 0.1 to 3.0 mol per 100 mol of barium titanate.
- the A 1 2 0 3 was added after calcining other starting materials. Although it may be added first as in the case of other starting materials, it is preferable to add it after calcination since the temperature characteristics can be further improved.
- the points of the present invention will be described.
- S i the A 1 and converted into S I_ ⁇ 2, A 1 2 ⁇ 3, respectively 0.3 to 3.5 moles relative to 100 moles of barium titanate, 0.01 to 3.0 to be moles added
- the BaO added at the same time is a mixture of barium titanate and barium carbonate so that the molar ratio of Ba / Ti in the dielectric material becomes 1.001 to 1.05.
- the dielectric ceramic composition of the present invention is very excellent in reduction resistance. If the dielectric ceramic composition of the present invention is used for a multilayer capacitor in which the internal and external electrodes are formed of a base metal, a multilayer capacitor having high insulation resistance, very little deterioration, and excellent long-term reliability can be obtained. Can be Further, the dielectric ceramic composition of the present invention has a high dielectric constant, a small variation in capacitance, a small rate of change in temperature and a small rate of change with time.
- the external electrodes of the multilayer capacitor are formed using a noble metal such as silver as well as a base metal such as copper, a multilayer capacitor having similarly excellent electric characteristics can be obtained.
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Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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AT00903959T ATE529389T1 (de) | 1999-02-19 | 2000-02-16 | Dielectrische keramische zusammensetzung, kondensator diese verwendend und herstellungsverfahren |
JP2000599707A JP3838036B2 (ja) | 1999-02-19 | 2000-02-16 | 誘電体磁器組成物、これを用いたコンデンサおよびその製造方法 |
US09/673,513 US6344427B1 (en) | 1999-02-19 | 2000-02-16 | Dielectric ceramic composition, capacitor using this and production method thereof |
EP00903959A EP1095917B1 (en) | 1999-02-19 | 2000-02-16 | Dielectric ceramic composition, capacitor using this and production method thereof |
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JP11/41202 | 1999-02-19 | ||
JP4120299 | 1999-02-19 |
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WO2000048963A1 true WO2000048963A1 (fr) | 2000-08-24 |
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PCT/JP2000/000844 WO2000048963A1 (fr) | 1999-02-19 | 2000-02-16 | Composition ceramique dielectrique, son emploi dans un condensateur et son procede de fabrication |
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US (1) | US6344427B1 (ja) |
EP (1) | EP1095917B1 (ja) |
JP (1) | JP3838036B2 (ja) |
KR (1) | KR100489595B1 (ja) |
CN (2) | CN1120137C (ja) |
AT (1) | ATE529389T1 (ja) |
TW (1) | TW475923B (ja) |
WO (1) | WO2000048963A1 (ja) |
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- 2000-02-16 CN CN00800112A patent/CN1120137C/zh not_active Expired - Lifetime
- 2000-02-16 US US09/673,513 patent/US6344427B1/en not_active Expired - Lifetime
- 2000-02-16 KR KR10-2000-7011567A patent/KR100489595B1/ko active IP Right Grant
- 2000-02-16 CN CNB021526354A patent/CN100426427C/zh not_active Expired - Lifetime
- 2000-02-16 JP JP2000599707A patent/JP3838036B2/ja not_active Expired - Lifetime
- 2000-02-16 WO PCT/JP2000/000844 patent/WO2000048963A1/ja active IP Right Grant
- 2000-02-16 EP EP00903959A patent/EP1095917B1/en not_active Expired - Lifetime
- 2000-02-16 AT AT00903959T patent/ATE529389T1/de active
- 2000-02-19 TW TW089102893A patent/TW475923B/zh not_active IP Right Cessation
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002338344A (ja) * | 2001-05-21 | 2002-11-27 | Matsushita Electric Ind Co Ltd | 耐還元性誘電体組成物及びそれを用いたセラミック電子部品 |
WO2004038743A1 (ja) * | 2002-10-28 | 2004-05-06 | Matsushita Electric Industrial Co., Ltd. | 積層セラミックコンデンサの製造方法 |
US6947276B2 (en) | 2002-10-28 | 2005-09-20 | Matsushita Electric Industrial Co., Ltd. | Process for producing laminated ceramic capacitor |
JP2005272262A (ja) * | 2004-03-26 | 2005-10-06 | Tdk Corp | 誘電体磁器組成物、積層型セラミックコンデンサ及びその製造方法 |
US7419927B2 (en) | 2004-08-30 | 2008-09-02 | Tdk Corporation | Ceramic electronic device and the production method |
US7550402B2 (en) | 2004-08-30 | 2009-06-23 | Tdk Corporation | Ceramic electronic device and the production method |
JPWO2006104026A1 (ja) * | 2005-03-28 | 2008-09-04 | 松下電器産業株式会社 | 誘電体磁器組成物、およびこれを用いたコンデンサの製造方法 |
JP4935671B2 (ja) * | 2005-03-28 | 2012-05-23 | パナソニック株式会社 | 誘電体磁器組成物、およびこれを用いたコンデンサの製造方法 |
JP2012056840A (ja) * | 2011-10-13 | 2012-03-22 | Tdk Corp | 電子部品、誘電体磁器組成物およびその製造方法 |
Also Published As
Publication number | Publication date |
---|---|
TW475923B (en) | 2002-02-11 |
EP1095917B1 (en) | 2011-10-19 |
CN1293645A (zh) | 2001-05-02 |
CN100426427C (zh) | 2008-10-15 |
KR20010042814A (ko) | 2001-05-25 |
US6344427B1 (en) | 2002-02-05 |
EP1095917A1 (en) | 2001-05-02 |
JP3838036B2 (ja) | 2006-10-25 |
CN1120137C (zh) | 2003-09-03 |
CN1516208A (zh) | 2004-07-28 |
EP1095917A4 (en) | 2007-04-04 |
KR100489595B1 (ko) | 2005-05-16 |
ATE529389T1 (de) | 2011-11-15 |
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