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Temperature-stable middle-dielectric constant microwave dielectric ceramic Li2Sm2ZnTiO7
The invention discloses temperature-stable middle-dielectric constant microwave dielectric ceramic Li2Sm2ZnTiO7 and a preparation method thereof. The preparation method comprises the steps that 1,original powder of Li2CO3, Sm2O3, ZnO and TiO2 with the purity larger than 99.9% (weight percentage) is weighed and matched according to the composition of the Li2Sm2ZnTiO7; 2,wet ball grinding and mixing are carried out on the raw materials obtained in the step 1 for 12 h, the ball grinding medium is distilled water, and presintering is carried out in the air atmosphere at 850 DEG C for 6 h after drying; 3, a binding agent is added into the powder obtained in the step 2, pelleting is carried out, compression molding is carried out, and finally sintering is carried out in air atmosphere at 900-950 DEG C for 4 h; a polyvinyl alcohol solution with the mass concentration being 5% is adopted as the binding agent, and the addition amount of polyvinyl alcohol accounts for 3% of the total mass of the powder. The prepared ceramic is good in sintering performance at the temperature lower than 950 DEG C, the dielectric constant reaches 36.2-37.9, the Qf value reaches up to 72000-131000 GHz, the resonant frequency temperature coefficient is small, and the temperature-stable middle-dielectric constant microwave dielectric ceramic Li2Sm2ZnTiO7 has the extremely high application value in industry.
Temperature-stable middle-dielectric constant microwave dielectric ceramic Li2Sm2ZnTiO7
The invention discloses temperature-stable middle-dielectric constant microwave dielectric ceramic Li2Sm2ZnTiO7 and a preparation method thereof. The preparation method comprises the steps that 1,original powder of Li2CO3, Sm2O3, ZnO and TiO2 with the purity larger than 99.9% (weight percentage) is weighed and matched according to the composition of the Li2Sm2ZnTiO7; 2,wet ball grinding and mixing are carried out on the raw materials obtained in the step 1 for 12 h, the ball grinding medium is distilled water, and presintering is carried out in the air atmosphere at 850 DEG C for 6 h after drying; 3, a binding agent is added into the powder obtained in the step 2, pelleting is carried out, compression molding is carried out, and finally sintering is carried out in air atmosphere at 900-950 DEG C for 4 h; a polyvinyl alcohol solution with the mass concentration being 5% is adopted as the binding agent, and the addition amount of polyvinyl alcohol accounts for 3% of the total mass of the powder. The prepared ceramic is good in sintering performance at the temperature lower than 950 DEG C, the dielectric constant reaches 36.2-37.9, the Qf value reaches up to 72000-131000 GHz, the resonant frequency temperature coefficient is small, and the temperature-stable middle-dielectric constant microwave dielectric ceramic Li2Sm2ZnTiO7 has the extremely high application value in industry.
Temperature-stable middle-dielectric constant microwave dielectric ceramic Li2Sm2ZnTiO7
LI CHUNCHUN (author) / TANG YING (author) / WANG DAN (author)
2016-01-20
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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