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Temperature stable low dielectric constant microwave dielectric ceramic Li2Sr2LaV3O12
The invention discloses a temperature stable low dielectric constant microwave dielectric ceramic Li2Sr2LaV3O12 and a preparation method thereof. The method includes: (1) weighing Li2CO3, SrCO3, La2O3 and V2O5 original powder with purity of over 99.9% (weight percentage) according to the composition of Li2Sr2LaV3O12; (2) subjecting the raw materials of step (1) to wet ball-milling mixing for 12h, taking distilled water as the ball-milling medium, performing drying, then conducting presintering in 750DEG C air atmosphere for 6h; and (3) adding a binder into the powder prepared in step (2) and conducting granulation, then performing compression moulding, and finally conducting sintering in 800-850DEG C air atmosphere for 4h. The binder adopts a polyvinyl alcohol solution with a mass concentration of 5%, and the adding amount of polyvinyl alcohol accounts for 3% of the total mass of the powder. The ceramic prepared by the method provided by the invention can be well sintered below 900DEG C, and has a dielectric constant up to 27.2-27.7, a quality factor Qf value up to 104000-143000GHz and a small temperature coefficient of resonant frequency, thus having enormous application value in industry.
Temperature stable low dielectric constant microwave dielectric ceramic Li2Sr2LaV3O12
The invention discloses a temperature stable low dielectric constant microwave dielectric ceramic Li2Sr2LaV3O12 and a preparation method thereof. The method includes: (1) weighing Li2CO3, SrCO3, La2O3 and V2O5 original powder with purity of over 99.9% (weight percentage) according to the composition of Li2Sr2LaV3O12; (2) subjecting the raw materials of step (1) to wet ball-milling mixing for 12h, taking distilled water as the ball-milling medium, performing drying, then conducting presintering in 750DEG C air atmosphere for 6h; and (3) adding a binder into the powder prepared in step (2) and conducting granulation, then performing compression moulding, and finally conducting sintering in 800-850DEG C air atmosphere for 4h. The binder adopts a polyvinyl alcohol solution with a mass concentration of 5%, and the adding amount of polyvinyl alcohol accounts for 3% of the total mass of the powder. The ceramic prepared by the method provided by the invention can be well sintered below 900DEG C, and has a dielectric constant up to 27.2-27.7, a quality factor Qf value up to 104000-143000GHz and a small temperature coefficient of resonant frequency, thus having enormous application value in industry.
Temperature stable low dielectric constant microwave dielectric ceramic Li2Sr2LaV3O12
CHEN JINWU (Autor:in) / TANG YING (Autor:in) / FANG WEISHUANG (Autor:in)
13.01.2016
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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