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Process for producing low temperature sintered multilayer ceramic capacitor ceramics

A multi-layer ceramic and low-temperature sintering technology, which is applied in the direction of fixed capacitor dielectric and fixed capacitor parts, etc., can solve the problems of rare multi-layer ceramic capacitor ceramic materials, achieve good process tolerance, improve pass rate, and reduce The effect of production costs

Active Publication Date: 2007-04-11
SHANDONG SINOCERA FUNCTIONAL MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the sintering of ceramic materials for multilayer ceramic capacitors generally adopts high temperature or medium temperature, and low temperature sintering of ceramic materials for multilayer ceramic capacitors is rare.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) The main component is 23.2wt% BaCO 3 , 42.9wt% TiO 2 , 33.9wt% Nb 2 o 3 After mechanical mixing and dispersion, drying, calcining at 1020°C-1180°C, and holding for 4 hours;

[0040] (2) The glass is 20.1wt% H 3 BO 3 , 26.1wt% SiO 2 , 30.4wt% ZnO, 23.4wt% Bi 2 o 3 After mechanical mixing and dispersion, drying, calcining at 400°C-800°C, and keeping the temperature for not less than 1 hour;

[0041] (3) 90wt% of the main component and 10wt% of glass are added to the water ball mill for 7 hours according to the ratio of material: water = 1: 1-2, and dried to obtain the ceramic material of the multilayer ceramic capacitor.

[0042] Utilize a kind of low-temperature sintered multilayer ceramic capacitor porcelain material produced by the present embodiment, its electrical properties are:

[0043] Dielectric constant: ε=100.4

[0044] Dielectric loss: 0.04%

[0045] Insulation resistance: ≥10 12 Ω

[0046] Temperature coefficient TCC: +25.2ppm(-55℃)~+26.1(+12...

Embodiment 2

[0049] (1) The main component is 23.2wt% BaCO 3 , 41.3wt% TiO 2 , 35.5wt% Nb 2 o 3 After mechanical mixing and dispersion, drying, calcining at 1020°C-1180°C, and holding for 4 hours;

[0050] (2) The glass is 20.1wt% H 3 BO 3 , 26.1wt% SiO 2 , 30.4wt% ZnO, 23.4wt% Bi 2 o 3 After mechanical mixing and dispersion, drying, calcining at 400°C-800°C, and keeping the temperature for not less than 1 hour;

[0051] (3) 90wt% of the main component and 10wt% of glass are added to the water ball mill for 7 hours according to the ratio of material: water = 1: 1-2, and dried to obtain the ceramic material of the multilayer ceramic capacitor.

[0052] Utilize a kind of low-temperature sintered multilayer ceramic capacitor porcelain material produced by the present embodiment, its electrical properties are:

[0053] Dielectric constant: ε=91.1

[0054] Dielectric loss: 0.03%

[0055] Insulation resistance: ≥10 12 Ω

[0056] Temperature coefficient TCC: +24.2ppm(-55℃)~+25.4(+125...

Embodiment 3

[0059] (1) The main component is 23.2wt% BaCO 3 , 39.7wt% TiO 2 , 37.1wt% Nb 2 o 3 After mechanical mixing and dispersion, drying, calcining at 1020°C-1180°C, and holding for 4 hours;

[0060] (2) The glass is 20.1wt% H 3 BO 3 , 26.1wt% SiO 2 , 30.4wt% ZnO, 23.4wt% Bi 2 o 3 , 0-5wt% K 2 CO 3 , 0-5wt% KLi 2 CO 3 After mechanical mixing and dispersion, drying, calcining at 400°C-800°C, and keeping the temperature for not less than 1 hour;

[0061] (3) 90wt% of the main component and 10wt% of glass are added to the water ball mill for 7 hours according to the ratio of material: water = 1: 1-2, and dried to obtain the ceramic material of the multilayer ceramic capacitor.

[0062] Utilize a kind of low-temperature sintered multilayer ceramic capacitor porcelain material produced by the present embodiment, its electrical properties are:

[0063] Dielectric constant: ε=84.2

[0064] Dielectric loss: 0.04%

[0065] Insulation resistance: ≥10 12 Ω

[0066] Temperature ...

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Abstract

The present invention provides the recipe and production process of low temperature sintered ceramic material for multilayer ceramic capacitor. The ceramic material is produced with main component in 84-96 wt%, glass material in 3-14 wt%, Bi2O3.nTiO2 in 0-13 wt% and SrTiO3 in 0-10 wt%, and through mixing, water milling and drying. Of the materials, the main component is prepared with BaCO3, TiO2, etc and through mechanical mixing, drying, calcining and holding; the glass material is prepared with H3BO3, SiO2, etc and through mechanical mixing, drying, calcining and holding; and Bi2O3 .nTiO2 is prepared with Bi2O3 and TiO2 and through mixing, drying, calcining and holding. The ceramic material has dielectric constant of 70-100, dielectric loss of 0.01-0.05%, insulation resistance not lower than 1012 ohm, and TCC within 30ppm (-55deg.C to +125deg.C). It possesses the features of low sintering temperature, environment friendship, etc.

Description

Technical field: [0001] The invention relates to a capacitor ceramic material, in particular to a low-temperature sintered multilayer ceramic capacitor ceramic material. Background technique: [0002] At present, low-dielectric multilayer ceramic capacitor ceramic materials are mainly used to make small-capacity, high-precision high-frequency capacitors, and are widely used in clock oscillation circuits and temperature compensation circuits to improve product consistency, reliability and hit rate. Has an irreplaceable advantage. At present, the sintering of multilayer ceramic capacitor porcelain is generally at high temperature or medium temperature, and low temperature sintering of multilayer ceramic capacitor porcelain is rare. Invention content: [0003] The purpose of the present invention is to provide a low-temperature sintered multilayer ceramic capacitor ceramic material formula and its production process. [0004] The invention provides a production process of l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/462C04B35/622H01G4/12
Inventor 张鹏应红吴素文
Owner SHANDONG SINOCERA FUNCTIONAL MATERIAL CO LTD
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