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Microwave dielectric ceramic Li4Zn5Sb2O12 with low dielectric constant and preparation method of microwave dielectric ceramic
The invention discloses microwave dielectric ceramic Li4Zn5Sb2O12 capable of being sintered at low temperature and having high quality factor, stable temperature and low dielectric constant as well as a preparation method of the microwave dielectric ceramic Li4Zn5Sb2O12. The preparation method comprises steps as follows: (1), original powder of Li2CO3, ZnO and Sb2O5 with the purity of higher than 99.9% in percentage by weight is weighed and blended according to composition of Li4Zn5Sb2O12; (2), the raw materials in the step (1) are subjected to wetted ball grinding and mixing for 12 h, a ball grinding medium is distilled water, and the dried raw materials are presintered for 6 h in the air atmosphere at the temperature of 750 DEG C; (3), after a binding agent is added to powder prepared in the step (2) and the powder is granulated, the powder is subjected to compression moulding and sintered for 4 h in the air atmosphere at the temperature of 800-850 DEG C finally; the binding agent adopts a polyvinyl alcohol solution with the mass concentration of 5%, and the addition amount of polyvinyl alcohol accounts for 3% of the total mass of the powder. The prepared ceramic is sintered well at the temperature lower than 850 DEG C, the dielectric constant reaches 22.5-23.7, the Qf (quality factor) value of the ceramic is up to 91,000-123,000 GHz, the temperature coefficient of resonance frequency is small, and the ceramic has great industrial application value.
Microwave dielectric ceramic Li4Zn5Sb2O12 with low dielectric constant and preparation method of microwave dielectric ceramic
The invention discloses microwave dielectric ceramic Li4Zn5Sb2O12 capable of being sintered at low temperature and having high quality factor, stable temperature and low dielectric constant as well as a preparation method of the microwave dielectric ceramic Li4Zn5Sb2O12. The preparation method comprises steps as follows: (1), original powder of Li2CO3, ZnO and Sb2O5 with the purity of higher than 99.9% in percentage by weight is weighed and blended according to composition of Li4Zn5Sb2O12; (2), the raw materials in the step (1) are subjected to wetted ball grinding and mixing for 12 h, a ball grinding medium is distilled water, and the dried raw materials are presintered for 6 h in the air atmosphere at the temperature of 750 DEG C; (3), after a binding agent is added to powder prepared in the step (2) and the powder is granulated, the powder is subjected to compression moulding and sintered for 4 h in the air atmosphere at the temperature of 800-850 DEG C finally; the binding agent adopts a polyvinyl alcohol solution with the mass concentration of 5%, and the addition amount of polyvinyl alcohol accounts for 3% of the total mass of the powder. The prepared ceramic is sintered well at the temperature lower than 850 DEG C, the dielectric constant reaches 22.5-23.7, the Qf (quality factor) value of the ceramic is up to 91,000-123,000 GHz, the temperature coefficient of resonance frequency is small, and the ceramic has great industrial application value.
Microwave dielectric ceramic Li4Zn5Sb2O12 with low dielectric constant and preparation method of microwave dielectric ceramic
FANG WEISHUANG (author) / WANG DAN (author) / LI CHUNCHUN (author)
2015-12-23
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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