Medium low temperature sintered high voltage ceramic capacitor medium

A technology for capacitor dielectrics and high-voltage ceramics, which is applied in the direction of fixed capacitor dielectrics, ceramics, and components of fixed capacitors. It can solve the problems of poor safety and large performance fluctuations of capacitors, and achieve high withstand voltage, good performance stability, and simple process. Effect

Inactive Publication Date: 2005-05-25
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The performance fluctuates greatly during use, a

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] The present invention will be further described in conjunction with embodiment now.

[0027]Tables 1, 2, and 3 provide the formulas of nine samples of three groups of embodiments of the present invention. The first group of embodiments (sample 1,2,3) has Y5U temperature characteristics; The second group of embodiments (sample 4,5,6) has Y5T and X7R temperature characteristics; The third group of embodiments (sample 7, 8, 9) have X7R temperature characteristics.

[0028] try

Sample

make up

No

Composition (wt%)

BaTiO 3

SrTiO 3

CaZrO 3

Nb 2 o 5

MgO

CeO 2

ZnO

co 2 o 3

bismuth

Lithium

solid

dissolve

body

1

73.5

17.3

6

0.5

0.2

0.3

0.4

0.8

1

2

74

16.5

6

0.6 ...

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Abstract

A formula for medium of intermediate and low temperature sintering high voltage ceramic capacitor is (by weight) BaTiO3 60-90%, SrTiO3 1-20%, CaZrO3 0.1-10%, Nb2O5 0.01-1%, MgO 0.01-1%, CeO2 0.01-0.8%, ZnO 0.01-0.6%, Co2O3 0.03-1%, bismuth lithium solid solution 0.05-10% wherein the BaTiO3, SrTiO3 and CaZrO3 are synthesized from conventional chemical material by solid phase method. Said medium is no lead, no cadmic and no toxicity sintered at 1100-1150 degree centigrade with greater than 6.0 KV/mm of voltage resisting, 2000-3000 dielectric constant etc properties.

Description

technical field [0001] The present invention relates to the composition of medium-low temperature sintered high-voltage ceramic capacitor medium, in particular to a medium-low temperature sintered high-voltage ceramic capacitor medium, which is suitable for preparing single-chip ceramic capacitors and multilayer chip ceramic capacitors, and can greatly reduce the cost of ceramic capacitors. And it does not pollute the environment in the process of preparation and use. technical background [0002] Color TV, computer, communication, aerospace, missile, navigation and other fields urgently need ceramic capacitors with high breakdown voltage, good temperature stability (such as X7R, Y5T and Y5U characteristics, etc.), and high reliability. The sintering temperature of the general monolithic high-voltage ceramic capacitor medium is usually 1300-1400°C, while the sintering temperature of the medium-low temperature sintered ceramic capacitor medium of the present invention is 1100...

Claims

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Application Information

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IPC IPC(8): C04B35/468H01B3/12H01G4/12
Inventor 黄新友高春华李军
Owner JIANGSU UNIV
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