Ceramic dielectric material matched with nickel inner electrode and production method of capacitor produced by ceramic dielectric material

A ceramic dielectric and internal electrode technology, applied in capacitors, fixed capacitors, laminated capacitors, etc., can solve the problem of high cost and achieve good electrical performance

Active Publication Date: 2010-07-28
GUANGDONG FENGHUA ADVANCED TECH HLDG
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AI Technical Summary

Problems solved by technology

The dielectric constant of MLCC products is in the range of 10 to 20, and the frequency characteristics and dielectric properties are excellent, but this MLCC product uses Ag-Pd as the internal electrode, and the cost is relatively high

Method used

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  • Ceramic dielectric material matched with nickel inner electrode and production method of capacitor produced by ceramic dielectric material

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Embodiment

[0017] An anti-reduction nickel electrode high frequency low dielectric ceramic dielectric material, the raw material with a purity of more than 99.5% is selected, and 1.0 mole of Mg(OH) 2 , 0.9 mol SiO 2 , 0.1 mol ZrO 2 The mixing ratio is uniform, and the mixture is calcined at 1170°C for 3 hours, and the main crystal phase is MgSi 0.9 Zr 0.1 o 3 s material. Then add the modifying additives and sintering aids shown in Table 1 in predetermined proportions.

[0018] Table 1: Formulation composition of main crystal phase, modifying additives, and sintering flux

[0019]

[0020] According to the production process of ceramic materials commonly used by those skilled in the art, MLCC ceramic materials are produced. In the production process of chip MLCC, organic binders and solvents such as ethanol are first added to form a slurry, and the slurry is cast into a film. sheet, print nickel Ni internal electrodes on the diaphragm, alternately laminate the required number of ...

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Abstract

The invention discloses a ceramic dielectric material matched with a nickel inner electrode and a production method of a capacitor produced by the ceramic dielectric material. The ceramic dielectric material consists of a main crystal phase, a property-modifying additive and a sintered fluxing agent, wherein the main crystal phase is MgZrxSi(1-x)O3, and x is more than or equal to 0.05 and less than or equal to 0.15; the property-modifying additive is one or more of MnO2, Al2O3, CaO, Bi2O3 and TiO2; and the sintered fluxing agent is one or more of B2O3, SiO2, ZnO, Li2O, K2O and BaO. The ceramic dielectric material can meet the COG characteristic in the EIA standard, has good uniformity, uniform particle size distribution, high dispersibility, good molding technique and excellent dielectricproperty and meets the environmental requirement. When the material is used for making a multi-layer chip ceramic capacitor (MLCC), the material and the nickel electrode can be matched and sintered under the reducing atmosphere, the crystal particles of a ceramic body after sintering can grow uniformly and densely, the dielectric layer can be well matched with the inner electrode, and the productperformance is stable.

Description

technical field [0001] The invention relates to a ceramic dielectric material and a preparation method of the obtained components, in particular to a ceramic material conforming to COG characteristics, which can be sintered in a reducing atmosphere, and can be matched with a nickel inner electrode. A high-frequency low-dielectric ceramic dielectric material and the preparation of MLCC product. Background technique [0002] With the penetration and expansion of electronic information technology in various technical fields, chip multilayer ceramic capacitors, referred to as MLCC, as an important electronic component, have always maintained the same high-level development speed as large-scale integrated circuits. The current development trend of MLCC technology is miniaturization, low voltage and large capacity, chip type, high voltage serialization, and base metalization of internal electrodes. Among them, the large-scale application of base metal nickel electrode MLCC is part...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/14C04B35/63H01G4/12H01G4/30
CPCC04B2235/3418C04B2235/3267C04B2235/3409C04B2235/365C04B2235/3201H01G4/30C04B2235/3284C04B2235/36C04B2235/3232C04B2235/3215C04B2235/3217C04B2235/3208H01G4/1245C04B35/20C04B2235/3203H01G4/0085C04B2235/3244C04B2235/3298Y10T29/435
Inventor 宋蓓蓓宋永生莫方策任海东王孝国郭精华
Owner GUANGDONG FENGHUA ADVANCED TECH HLDG
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