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Temperature stable type ultralow dielectric constant microwave dielectric ceramic BaSiV2O8
The invention discloses a low temperature sinterable temperature stable type ultralow dielectric constant microwave dielectric ceramic BaSiV2O8 and a preparation method thereof. The method includes: (1) weighing ingredients BaCO3, SiO2 and V2O5 with purity of more than 99.9% (weight percent) according to the composition of BaSiV2O8; (2) subjecting the raw materials in step (1) to wet ball mill mixing for 12h, taking distilled water as the ball milling medium, conducting drying, and then performing presintering for 6h in 800DEG C air atmosphere; and (3) adding a binder into the prepared powder and conducting granulation, then carrying out compression moulding, and finally performing sintering in 850-900DEG C air atmosphere for 4h. The binder is 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 invention can be well sintered below 900DEG C, the dielectric constant reaches 13.1-13.7, and the quality factor Qf value is up to 87000-128000GHz, and the resonant frequency temperature coefficient is small. Thus, the temperature stable type ultralow dielectric constant microwave dielectric ceramic BaSiV2O8 has great application value in industry.
Temperature stable type ultralow dielectric constant microwave dielectric ceramic BaSiV2O8
The invention discloses a low temperature sinterable temperature stable type ultralow dielectric constant microwave dielectric ceramic BaSiV2O8 and a preparation method thereof. The method includes: (1) weighing ingredients BaCO3, SiO2 and V2O5 with purity of more than 99.9% (weight percent) according to the composition of BaSiV2O8; (2) subjecting the raw materials in step (1) to wet ball mill mixing for 12h, taking distilled water as the ball milling medium, conducting drying, and then performing presintering for 6h in 800DEG C air atmosphere; and (3) adding a binder into the prepared powder and conducting granulation, then carrying out compression moulding, and finally performing sintering in 850-900DEG C air atmosphere for 4h. The binder is 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 invention can be well sintered below 900DEG C, the dielectric constant reaches 13.1-13.7, and the quality factor Qf value is up to 87000-128000GHz, and the resonant frequency temperature coefficient is small. Thus, the temperature stable type ultralow dielectric constant microwave dielectric ceramic BaSiV2O8 has great application value in industry.
Temperature stable type ultralow dielectric constant microwave dielectric ceramic BaSiV2O8
CHEN JINWU (author) / FANG LIANG (author) / WANG DAN (author)
2015-08-19
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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