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Temperature-stable type magnesium titanate base microwave dielectric ceramic
The invention discloses temperature-stable type magnesium titanate base microwave dielectric ceramic. The target composition expression of the temperature-stable type magnesium titanate base microwave dielectric ceramic is 0.9MgTiO3-0.1(K0.5La0.5)TiO3. Firstly, MgO and TiO2 are mixed according to the stoichiometry equation MgTiO3, and presintering is carried out at 800-1000 DEG C after ball milling, drying and screening are carried out; secondly,La2O3, K2CO3 and TiO2 are mixed according to the stoichiometry equation(K0.5La0.5)TiO3, and presintering is carried out at 1000-1200 DEG C after ball milling, drying and screening are carried out; thirdly, the two kinds of powder obtained after presintering are mixed according to the mole ratio of 9:1 and pressed into a green body after ball milling, drying, screening and pelleting are carried out; fourthly, the green body is sintered at 1250 DEG C-1350 DEG C, and the temperature-stable type magnesium titanate base microwave dielectric ceramic is prepared. The QF value of the temperature-stable type magnesium titanate base microwave dielectric ceramic reaches 31,000-68,000 GHz, and the temperature coefficient (tao f) of resonance frequency reaches -7.9--0.7*10<-6>/DEG C. The ceramic system is simple in preparing technology and superior in microwave dielectric performance, has saved energy cost, conforms to the low-carbon environment-friendly concept and has wide application prospects.
Temperature-stable type magnesium titanate base microwave dielectric ceramic
The invention discloses temperature-stable type magnesium titanate base microwave dielectric ceramic. The target composition expression of the temperature-stable type magnesium titanate base microwave dielectric ceramic is 0.9MgTiO3-0.1(K0.5La0.5)TiO3. Firstly, MgO and TiO2 are mixed according to the stoichiometry equation MgTiO3, and presintering is carried out at 800-1000 DEG C after ball milling, drying and screening are carried out; secondly,La2O3, K2CO3 and TiO2 are mixed according to the stoichiometry equation(K0.5La0.5)TiO3, and presintering is carried out at 1000-1200 DEG C after ball milling, drying and screening are carried out; thirdly, the two kinds of powder obtained after presintering are mixed according to the mole ratio of 9:1 and pressed into a green body after ball milling, drying, screening and pelleting are carried out; fourthly, the green body is sintered at 1250 DEG C-1350 DEG C, and the temperature-stable type magnesium titanate base microwave dielectric ceramic is prepared. The QF value of the temperature-stable type magnesium titanate base microwave dielectric ceramic reaches 31,000-68,000 GHz, and the temperature coefficient (tao f) of resonance frequency reaches -7.9--0.7*10<-6>/DEG C. The ceramic system is simple in preparing technology and superior in microwave dielectric performance, has saved energy cost, conforms to the low-carbon environment-friendly concept and has wide application prospects.
Temperature-stable type magnesium titanate base microwave dielectric ceramic
LI LINGXIA (Autor:in) / LI SAI (Autor:in) / LYU XIAOSONG (Autor:in) / YE JING (Autor:in) / SUN HAO (Autor:in)
07.10.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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