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Temperature-stable low-dielectric-constant microwave dielectric ceramic Li2Ba2NdV3O12 capable of being sintered at low temperature
The invention discloses temperature-stable low-dielectric-constant microwave dielectric ceramic Li2Ba2NdV3O12 capable of being sintered at low temperature and a preparation method thereof. The method includes the steps that firstly, Li2CO3 original powder, BaCO3 original powder, Nd2O3 original powder and V2O5 original powder with the purity higher than 99.9% (by weight) are weighed and mixed according to the components of Li2Ba2NdV3O12; secondly, the raw materials obtained in the first step are subjected to wet ball grinding and mixed for 12 hours, a ball grinding medium is distilled water, and the mixture is pre-sintered for 6 hours at the atmosphere at the temperature of 750 DEG C; thirdly, an adhesive is added into the powder prepared in the second step, the prepared powder is granulated, pressed and formed, and finally the powder is sintered for 4 hours at the atmosphere at the temperature of 800-850 DEG C, wherein the adhesive is a polyvinyl alcohol solution with the mass concentration being 5%, 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 below 850 DEG C, the dielectric constant reaches 29.3-29.9, the quality factor Qf value is as high as 101,000-145,000 GHz, the resonance frequency temperature coefficient is small, and the ceramic has great application value in industry.
Temperature-stable low-dielectric-constant microwave dielectric ceramic Li2Ba2NdV3O12 capable of being sintered at low temperature
The invention discloses temperature-stable low-dielectric-constant microwave dielectric ceramic Li2Ba2NdV3O12 capable of being sintered at low temperature and a preparation method thereof. The method includes the steps that firstly, Li2CO3 original powder, BaCO3 original powder, Nd2O3 original powder and V2O5 original powder with the purity higher than 99.9% (by weight) are weighed and mixed according to the components of Li2Ba2NdV3O12; secondly, the raw materials obtained in the first step are subjected to wet ball grinding and mixed for 12 hours, a ball grinding medium is distilled water, and the mixture is pre-sintered for 6 hours at the atmosphere at the temperature of 750 DEG C; thirdly, an adhesive is added into the powder prepared in the second step, the prepared powder is granulated, pressed and formed, and finally the powder is sintered for 4 hours at the atmosphere at the temperature of 800-850 DEG C, wherein the adhesive is a polyvinyl alcohol solution with the mass concentration being 5%, 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 below 850 DEG C, the dielectric constant reaches 29.3-29.9, the quality factor Qf value is as high as 101,000-145,000 GHz, the resonance frequency temperature coefficient is small, and the ceramic has great application value in industry.
Temperature-stable low-dielectric-constant microwave dielectric ceramic Li2Ba2NdV3O12 capable of being sintered at low temperature
CHEN JINWU (author) / TANG YING (author) / FANG WEISHUANG (author)
2016-01-06
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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