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Temperature-stable low-dielectric-constant microwave dielectric ceramic Li4Sm2TiO7 capable of being sintered at low temperature
The invention discloses high-quality-factor temperature-stable low-dielectric-constant microwave dielectric ceramic Li4Sm2TiO7 capable of being sintered at low temperature and a preparation method thereof. Firstly, original powder of Li2CO3, Sm2O3 and TiO2 with the purity larger than 99.9% (weight percentage) is weighed and mixed according to the composition of the Li4Sm2TiO7; secondly, the raw materials in the first step are subjected to wet ball grinding and mixed for 12 h, ball grinding media are distilled water, and the raw materials are pre-burnt for 6 h in the atmosphere of 830 DEG C after being dried; thirdly, after adhesion agents are added in the powder prepared in the second step and pelleting is performed, compression molding is performed, and finally the powder is sintered in the atmosphere of 880-930 DEG C for 4 h; the adhesion agents are prepared from a polyvinyl alcohol solution with the mass concentration being 5%, and the adding amount of polyvinyl alcohol accounts for 3% of the total mass of the powder. The prepared ceramic is well sintered at the temperature of 930 DEG C, the dielectric constant becomes 33.7-34.9, the quality factor Qf value of the ceramic reaches up to 89,000-113,000 GHz, the resonance frequency temperature coefficient is small, and the ceramic has great industrial application value.
Temperature-stable low-dielectric-constant microwave dielectric ceramic Li4Sm2TiO7 capable of being sintered at low temperature
The invention discloses high-quality-factor temperature-stable low-dielectric-constant microwave dielectric ceramic Li4Sm2TiO7 capable of being sintered at low temperature and a preparation method thereof. Firstly, original powder of Li2CO3, Sm2O3 and TiO2 with the purity larger than 99.9% (weight percentage) is weighed and mixed according to the composition of the Li4Sm2TiO7; secondly, the raw materials in the first step are subjected to wet ball grinding and mixed for 12 h, ball grinding media are distilled water, and the raw materials are pre-burnt for 6 h in the atmosphere of 830 DEG C after being dried; thirdly, after adhesion agents are added in the powder prepared in the second step and pelleting is performed, compression molding is performed, and finally the powder is sintered in the atmosphere of 880-930 DEG C for 4 h; the adhesion agents are prepared from a polyvinyl alcohol solution with the mass concentration being 5%, and the adding amount of polyvinyl alcohol accounts for 3% of the total mass of the powder. The prepared ceramic is well sintered at the temperature of 930 DEG C, the dielectric constant becomes 33.7-34.9, the quality factor Qf value of the ceramic reaches up to 89,000-113,000 GHz, the resonance frequency temperature coefficient is small, and the ceramic has great industrial application value.
Temperature-stable low-dielectric-constant microwave dielectric ceramic Li4Sm2TiO7 capable of being sintered at low temperature
FANG WEISHUANG (author) / TANG YING (author) / WANG DAN (author)
2016-01-27
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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