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Microwave dielectric ceramics with low-loss temperature-stable ultralow dielectric constant microwave dielectric ceramic Li2Zn2V8O23
The invention discloses a low temperature sinterable high quality factor temperature-stable ultralow dielectric constant microwave dielectric ceramic Li2Zn2V8O23 and a preparation method thereof. The method includes: (1) weighing and blending Li2CO3, ZnO and V2O5 original powder with purity of over 99.9% (weight percent) according to the composition of Li2Zn2V8O23; (2) subjecting the raw materials of step (1) to wet ball-milling mixing for 12h, taking distilled water as the ball-milling medium, after drying, performing presintering in 700DEG C air atmosphere for 6h; and (3) adding a binder into the powder prepared in step (2) and conducting granulation, then conducting compression moulding, and finally performing sintering in 750-800DEG C air atmosphere. 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 powder. The ceramic prepared by the invention has good sinterability below 800DEG C, the dielectric constant reaches 17.1-17.8, the quality factor Qf value is up to 107000-142000GHz, and the resonant frequency temperature coefficient is small. Thus, the ceramic has huge application value in industry.
Microwave dielectric ceramics with low-loss temperature-stable ultralow dielectric constant microwave dielectric ceramic Li2Zn2V8O23
The invention discloses a low temperature sinterable high quality factor temperature-stable ultralow dielectric constant microwave dielectric ceramic Li2Zn2V8O23 and a preparation method thereof. The method includes: (1) weighing and blending Li2CO3, ZnO and V2O5 original powder with purity of over 99.9% (weight percent) according to the composition of Li2Zn2V8O23; (2) subjecting the raw materials of step (1) to wet ball-milling mixing for 12h, taking distilled water as the ball-milling medium, after drying, performing presintering in 700DEG C air atmosphere for 6h; and (3) adding a binder into the powder prepared in step (2) and conducting granulation, then conducting compression moulding, and finally performing sintering in 750-800DEG C air atmosphere. 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 powder. The ceramic prepared by the invention has good sinterability below 800DEG C, the dielectric constant reaches 17.1-17.8, the quality factor Qf value is up to 107000-142000GHz, and the resonant frequency temperature coefficient is small. Thus, the ceramic has huge application value in industry.
Microwave dielectric ceramics with low-loss temperature-stable ultralow dielectric constant microwave dielectric ceramic Li2Zn2V8O23
FANG LIANG (Autor:in) / SUN YIHUA (Autor:in) / LI DONGSHENG (Autor:in) / SUN XIAOHUA (Autor:in)
22.07.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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