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MLCC dielectric material wide in temperature range, stable, high in dielectric constant and low in loss and preparing method thereof
The invention discloses an MLCC dielectric material wide in temperature range, stable, high in dielectric constant and low in loss. The MLCC dielectric material is composed of Ba1-xBixTi1-x-yZn0.75xW0.25x+yO3, wherein x is larger than or equal to 0.20 and smaller than or equal to 0.30, and y is larger than or equal to 0.015 and smaller than or equal to 0.02. A preparing method includes the steps that ZnO, Bi2O3 and WO3 are prepared according to the molar ratio of 1:3/2:1/2, subjected to ball milling, dried and then pre-sintered at the temperature of 850 DEG C, and Bi(Zn3/4W1/4)O3 powder is prepared; the powder is subjected to secondary ball milling, dried and sieved; BaTiO3 serves as a base, BaTiO3, Bi(Zn3/4W1/4)O3 and WO3 are prepared according to the molar ratio of 1:0.20-0.30:0.015-0.02, subjected to ball milling, dried and sieved, paraffin is additionally fed, prilling is carried out, and the mixture is pressed into a green blank; the green blank is sintered at the temperature of 1,175 DEG C to 1,250 DEG C, and the MLCC dielectric material is prepared. The MLCC dielectric material has the high dielectric constant epsilon larger than or equal to 800+/-15% in the whole work temperature range of -35 DEG C to 375 DEG C, the excellent insulating property rho larger than or equal to 10<11> omega.cm and the low dielectric loss tandelta smaller than or equal to 0.02, and the MLCC dielectric material is a multilayer ceramic capacitor dielectric material with broad prospects.
MLCC dielectric material wide in temperature range, stable, high in dielectric constant and low in loss and preparing method thereof
The invention discloses an MLCC dielectric material wide in temperature range, stable, high in dielectric constant and low in loss. The MLCC dielectric material is composed of Ba1-xBixTi1-x-yZn0.75xW0.25x+yO3, wherein x is larger than or equal to 0.20 and smaller than or equal to 0.30, and y is larger than or equal to 0.015 and smaller than or equal to 0.02. A preparing method includes the steps that ZnO, Bi2O3 and WO3 are prepared according to the molar ratio of 1:3/2:1/2, subjected to ball milling, dried and then pre-sintered at the temperature of 850 DEG C, and Bi(Zn3/4W1/4)O3 powder is prepared; the powder is subjected to secondary ball milling, dried and sieved; BaTiO3 serves as a base, BaTiO3, Bi(Zn3/4W1/4)O3 and WO3 are prepared according to the molar ratio of 1:0.20-0.30:0.015-0.02, subjected to ball milling, dried and sieved, paraffin is additionally fed, prilling is carried out, and the mixture is pressed into a green blank; the green blank is sintered at the temperature of 1,175 DEG C to 1,250 DEG C, and the MLCC dielectric material is prepared. The MLCC dielectric material has the high dielectric constant epsilon larger than or equal to 800+/-15% in the whole work temperature range of -35 DEG C to 375 DEG C, the excellent insulating property rho larger than or equal to 10<11> omega.cm and the low dielectric loss tandelta smaller than or equal to 0.02, and the MLCC dielectric material is a multilayer ceramic capacitor dielectric material with broad prospects.
MLCC dielectric material wide in temperature range, stable, high in dielectric constant and low in loss and preparing method thereof
LI LINGXIA (author) / ZHANG BOWEN (author) / CHEN JUNXIAO (author)
2016-01-27
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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