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Temperature stable ultralow dielectric constant microwave dielectric ceramic LiZnYbV2O8
The invention discloses a low temperature sinterable tetragonal zirconia structure ultralow dielectric constant microwave dielectric ceramic LiZnYbV2O8 and a preparation method thereof. The method includes: (1) weighing Li2CO3, ZnO, Yb2O3 and V2O5 original powder with purity of over 99.9% (weight percentage) according to the composition of LiZnYbV2O8; (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 700DEG 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 750-800DEG 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 800DEG C, and has a dielectric constant up to 12.5-13.0, a quality factor Qf value up to 147000-181000GHz and a small temperature coefficient of resonant frequency, thus having enormous application value in industry.
Temperature stable ultralow dielectric constant microwave dielectric ceramic LiZnYbV2O8
The invention discloses a low temperature sinterable tetragonal zirconia structure ultralow dielectric constant microwave dielectric ceramic LiZnYbV2O8 and a preparation method thereof. The method includes: (1) weighing Li2CO3, ZnO, Yb2O3 and V2O5 original powder with purity of over 99.9% (weight percentage) according to the composition of LiZnYbV2O8; (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 700DEG 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 750-800DEG 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 800DEG C, and has a dielectric constant up to 12.5-13.0, a quality factor Qf value up to 147000-181000GHz and a small temperature coefficient of resonant frequency, thus having enormous application value in industry.
Temperature stable ultralow dielectric constant microwave dielectric ceramic LiZnYbV2O8
XIANG HUAICHENG (author) / TANG YING (author) / FANG WEISHUANG (author)
2016-01-13
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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