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Temperature-stable ultralow-dielectric-constant microwave dielectric ceramic LiZn3WVO9
The invention discloses a low-temperature-sintering temperature-stable ultralow-dielectric-constant microwave dielectric ceramic LiZn3WVO9 and a preparation method thereof. The preparation method comprises the following steps: (1) weighing and proportioning Li2CO3, ZnO, WO3 and V2O5 original powders with the purity of higher than 99.9 wt% according to the composition of the LiZn3WVO9; (2) carrying out wet ball milling mixing on the raw materials in the step (1) for 12 hours by using distilled water as a ball milling medium, drying, and presintering in an 800-DEG C atmospheric atmosphere for 6 hours; and (3) adding an adhesive into the powder prepared in the step (2), granulating, compacting, and finally, sintering in an 850-900-DEG C atmospheric atmosphere for 4 hours, wherein the adhesive adopts a 5 wt% polyvinyl alcohol solution, and the addition amount of the polyvinyl alcohol is 3% of the total mass of the powder. The ceramic has favorable sintering property at 950 DEG C, the dielectric constant reaches 8.3-8.9, the quality factor Qf value is up to 123000-158000 GHz, the temperature coefficient of resonance frequency is small, and the ceramic has great application value in industry.
Temperature-stable ultralow-dielectric-constant microwave dielectric ceramic LiZn3WVO9
The invention discloses a low-temperature-sintering temperature-stable ultralow-dielectric-constant microwave dielectric ceramic LiZn3WVO9 and a preparation method thereof. The preparation method comprises the following steps: (1) weighing and proportioning Li2CO3, ZnO, WO3 and V2O5 original powders with the purity of higher than 99.9 wt% according to the composition of the LiZn3WVO9; (2) carrying out wet ball milling mixing on the raw materials in the step (1) for 12 hours by using distilled water as a ball milling medium, drying, and presintering in an 800-DEG C atmospheric atmosphere for 6 hours; and (3) adding an adhesive into the powder prepared in the step (2), granulating, compacting, and finally, sintering in an 850-900-DEG C atmospheric atmosphere for 4 hours, wherein the adhesive adopts a 5 wt% polyvinyl alcohol solution, and the addition amount of the polyvinyl alcohol is 3% of the total mass of the powder. The ceramic has favorable sintering property at 950 DEG C, the dielectric constant reaches 8.3-8.9, the quality factor Qf value is up to 123000-158000 GHz, the temperature coefficient of resonance frequency is small, and the ceramic has great application value in industry.
Temperature-stable ultralow-dielectric-constant microwave dielectric ceramic LiZn3WVO9
FANG LIANG (Autor:in) / WANG DAN (Autor:in) / SU HEPING (Autor:in)
27.05.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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