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MLCC (multilayer ceramic capacitor) dielectric material with excellent insulation characteristic

A technology of capacitor dielectric and multilayer ceramics, which is applied in the direction of fixed capacitor dielectric and fixed capacitor parts, etc., can solve the problem of insulation resistivity decline, and achieve the effect of ensuring insulation characteristics, low dielectric loss, and wide working temperature range

Inactive Publication Date: 2017-11-28
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of insulation resistivity decline while ensuring the giant dielectric properties of the barium titanate-based dielectric material under reducing atmosphere

Method used

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  • MLCC (multilayer ceramic capacitor) dielectric material with excellent insulation characteristic
  • MLCC (multilayer ceramic capacitor) dielectric material with excellent insulation characteristic
  • MLCC (multilayer ceramic capacitor) dielectric material with excellent insulation characteristic

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Experimental program
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Embodiment 1

[0033] (1) First, use an electronic balance to weigh and analyze 2.6497g Na of pure grade (≥99%) 2 CO 3 , 11.6490g Bi 2 O 3 And 7.9898gTiO 2 After mixing, deionized water is used as the ball milling medium. After ball milling for 4 hours, it is dried, sieved, and calcined at 950℃ to obtain Na 0.5 Bi 0.5 TiO 3 ;

[0034] (2) Combine 2.2410g NiO and 9.3033g Nb 2 O 5 , Mix, use deionized water as ball milling medium, dry, sieved after ball milling for 4 hours, and calcined at 1000℃ to obtain (NiO) 0.3 (NbO 2.5 ) 0.7 The compound is ball milled for another 6 hours and passed through an 80-mesh sieve for use;

[0035] (3) Then use an electronic balance to weigh and analyze 5.7474g of pure grade (≥99%) MnCO 3 And 6.6452g Nb 2 O 5 , Mix, use deionized water as the ball milling medium, ball mill for 4 hours, dry, sieving, and calcining at 900 ℃ to obtain (MnO) 0.5 (NbO 2.5 ) 0.5 The compound is ball milled for another 6 hours and passed through an 80-mesh sieve for use;

[0036] (4) Add 22.32...

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Abstract

The invention discloses an MLCC (multilayer ceramic capacitor) dielectric material with an excellent insulation characteristic. BaTiO3 powder serves as a base material, components including, in percentage by mass, 0.3%-0.8% of Na0.5Bi0.5TiO3, 0-1.5% of (NiO)(1-x)(NbO2.5)x, 0-0.5% of (MnO)(1-y)(NbO2.5)y and 1.0%-3.0% of CaZrO3 are added, wherein x ranges from 0.6 to 0.8, and y ranges from 0.4 to 0.6. BaTiO3 powder serves as the base material, Na0.5Bi0.5TiO3 is added, and a BT-NBT mixture is prepared after calcination; (NiO)(1-x)(NbO2.5)x, (MnO)(1-y)(NbO2.5)y and CaZrO3 are added to the BT-NBT mixture, the mixture is subjected to ball milling, dried, sieved, granulated and pressed into a green body, the green body is calcined in the nitrogen and hydrogen mixed atmosphere at the temperature of 1,300-1,320 DEG C, and the MLCC dielectric material is prepared. The MLCC dielectric material has the capacitance change rate smaller than or equal to plus or minus 15%, high dielectric constant (41729), lower dielectric loss (0.026) and the resistivity higher than 1011 omega.cm within the temperature zone of subzero 55-150 DEG C.

Description

Technical field [0001] The invention belongs to a ceramic composition characterized by components, and specifically relates to an X8R type multilayer ceramic capacitor dielectric material with excellent insulation properties, large dielectric constant and temperature stability, and a preparation method thereof Background technique [0002] Chip multilayer ceramic capacitors (Multilayer Ceramic Capacitor, referred to as MLCC) as basic electronic components have a wide range of applications. Barium titanate (BaTiO 3 ) Dielectric materials for base temperature stable MLCC have been a research hotspot because of their harmlessness to the environment. [0003] Giant dielectric constant (ε> 10 4 ) The high temperature stable low loss dielectric material is an ideal material for the production of high performance energy storage devices, which can be applied in the fields of Gaojie MLCC, solid super capacitor and so on. BaTiO 3 When sintering in a reducing atmosphere, semiconductivity ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/49C04B35/626H01G4/12
CPCC04B35/49C04B35/626C04B35/62615C04B35/62645C04B35/62695C04B2235/3201C04B2235/3208C04B2235/3215C04B2235/3255C04B2235/3279C04B2235/6582C04B2235/94C04B2235/96H01G4/1227
Inventor 李玲霞蔡朝阳张宁李江腾卢特王瑞杰
Owner TIANJIN UNIV
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