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Temperature stabilization type low-dielectric-constant microwave dielectric ceramic BaLiNd2VO7
The invention discloses high-quality factor temperature stabilization type low-dielectric-constant microwave dielectric ceramic BaLiNd2VO7 capable of achieving low-temperature sintering and a preparation method thereof. The method includes the steps that (1) original powder of BaCO3, Li2CO3, Nd2O3 and V2O5 with the purity being over 99.9% (weight percentage) is weighed to be prepared according to the composition of the BaLiNd2VO7; (2) the raw materials in the first step are subjected to wet type ball milling to be mixed for 12 hours, the ball milling medium is distilled water, and presintering is conducted for 6 hours in the air atmosphere of 850 DEG C after drying; (3) after a binding agent is added into the powder obtained in the second step and pelleting is performed, compression molding is carried out, and finally sintering is conducted for 4 hours in the air atmosphere of 900-950 DEG C. A polyving akohol solution with the mass concentration being 5% is adopted to serve as the binding agent, and the adding amount of polyving akohol accounts for 3% of the total mass of the powder. The ceramic prepared through the method is good when being sintered below 950 DEG C, the dielectric constant reaches 21.6-22.5, the quality factor Qf value reaches up to 107000-137000 GHz, the temperature coefficient of resonance frequency is small, and therefore the ceramic has great application value in the industry.
Temperature stabilization type low-dielectric-constant microwave dielectric ceramic BaLiNd2VO7
The invention discloses high-quality factor temperature stabilization type low-dielectric-constant microwave dielectric ceramic BaLiNd2VO7 capable of achieving low-temperature sintering and a preparation method thereof. The method includes the steps that (1) original powder of BaCO3, Li2CO3, Nd2O3 and V2O5 with the purity being over 99.9% (weight percentage) is weighed to be prepared according to the composition of the BaLiNd2VO7; (2) the raw materials in the first step are subjected to wet type ball milling to be mixed for 12 hours, the ball milling medium is distilled water, and presintering is conducted for 6 hours in the air atmosphere of 850 DEG C after drying; (3) after a binding agent is added into the powder obtained in the second step and pelleting is performed, compression molding is carried out, and finally sintering is conducted for 4 hours in the air atmosphere of 900-950 DEG C. A polyving akohol solution with the mass concentration being 5% is adopted to serve as the binding agent, and the adding amount of polyving akohol accounts for 3% of the total mass of the powder. The ceramic prepared through the method is good when being sintered below 950 DEG C, the dielectric constant reaches 21.6-22.5, the quality factor Qf value reaches up to 107000-137000 GHz, the temperature coefficient of resonance frequency is small, and therefore the ceramic has great application value in the industry.
Temperature stabilization type low-dielectric-constant microwave dielectric ceramic BaLiNd2VO7
GE MENGLAN (Autor:in) / CHEN JINWU (Autor:in) / SU HEPING (Autor:in)
09.12.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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