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Temperature stable low dielectric constant microwave dielectric ceramic LiSrSmV2O8
The invention discloses a low loss and high thermal stability tetragonal zirconia structure low dielectric constant microwave dielectric ceramic LiSrSmV2O8 and a preparation method thereof. The method includes: (1) weighing Li2CO3, SrCO3, Sm2O3 and V2O5 original powder with purity of over 99.9% (weight percentage) according to the composition of LiSrSmV2O8; (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 850DEG C, and has a dielectric constant up to 21.1-21.7, a quality factor Qf value up to 117000-155000GHz and a small temperature coefficient of resonant frequency, thus having enormous application value in industry.
Temperature stable low dielectric constant microwave dielectric ceramic LiSrSmV2O8
The invention discloses a low loss and high thermal stability tetragonal zirconia structure low dielectric constant microwave dielectric ceramic LiSrSmV2O8 and a preparation method thereof. The method includes: (1) weighing Li2CO3, SrCO3, Sm2O3 and V2O5 original powder with purity of over 99.9% (weight percentage) according to the composition of LiSrSmV2O8; (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 850DEG C, and has a dielectric constant up to 21.1-21.7, a quality factor Qf value up to 117000-155000GHz and a small temperature coefficient of resonant frequency, thus having enormous application value in industry.
Temperature stable low dielectric constant microwave dielectric ceramic LiSrSmV2O8
WANG DAN (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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