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Temperature-stable type low-loss microwave dielectric ceramic and preparing method thereof
The invention discloses temperature-stable type low-loss microwave dielectric ceramic. The target composition expression of the temperature-stable type low-loss microwave dielectric ceramic is 0.99(0.95(Mg0.97Zn0.03)TiO3-0.05CaTiO3)-0.01LaAlO3. Firstly, MgO, TiO2, CaCO3 and ZnO are mixed according to the stoichiometry equation 0.95(Mg0.97Zn0.03)TiO3-0.05CaTiO3, and presintering is carried out at 900-1150 DEG C after ball milling, drying and screening are carried out; secondly, La2O3 and Al2O3 are mixed according to the stoichiometry equation LaAlO3, and presintering is carried out at 1100-1300 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 99:1 and pressed into a green body after ball milling, drying, screening and pelleting are carried out, the green body is sintered at 1150 DEG C-1250 DEG C, and the temperature-stable type low-loss microwave dielectric ceramic is prepared. The QF value of the temperature-stable type low-loss microwave dielectric ceramic reaches 55,000-88,500 GHz, and the temperature coefficient (tao f) of resonance frequency reaches -9.9--6.9*10<-6>/DEG C. The temperature-stable type low-loss microwave dielectric ceramic is simple in preparing technology and superior in microwave dielectric performance, saves energy cost, conforms to the low-carbon environment-friendly concept and has wide application prospects.
Temperature-stable type low-loss microwave dielectric ceramic and preparing method thereof
The invention discloses temperature-stable type low-loss microwave dielectric ceramic. The target composition expression of the temperature-stable type low-loss microwave dielectric ceramic is 0.99(0.95(Mg0.97Zn0.03)TiO3-0.05CaTiO3)-0.01LaAlO3. Firstly, MgO, TiO2, CaCO3 and ZnO are mixed according to the stoichiometry equation 0.95(Mg0.97Zn0.03)TiO3-0.05CaTiO3, and presintering is carried out at 900-1150 DEG C after ball milling, drying and screening are carried out; secondly, La2O3 and Al2O3 are mixed according to the stoichiometry equation LaAlO3, and presintering is carried out at 1100-1300 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 99:1 and pressed into a green body after ball milling, drying, screening and pelleting are carried out, the green body is sintered at 1150 DEG C-1250 DEG C, and the temperature-stable type low-loss microwave dielectric ceramic is prepared. The QF value of the temperature-stable type low-loss microwave dielectric ceramic reaches 55,000-88,500 GHz, and the temperature coefficient (tao f) of resonance frequency reaches -9.9--6.9*10<-6>/DEG C. The temperature-stable type low-loss microwave dielectric ceramic is simple in preparing technology and superior in microwave dielectric performance, saves energy cost, conforms to the low-carbon environment-friendly concept and has wide application prospects.
Temperature-stable type low-loss microwave dielectric ceramic and preparing method thereof
LI LINGXIA (Autor:in) / LI SAI (Autor:in) / GAO ZHENGDONG (Autor:in) / LYU XIAOSONG (Autor:in) / SUN HAO (Autor:in)
07.10.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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