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Temperature-stable ultralow-dielectric-constant microwave dielectric ceramic PrYV2O8
The invention discloses temperature-stable ultralow-dielectric-constant microwave dielectric ceramic PrYV2O8 adopting a tetragonal zirconia structure and allowing low-temperature sintering as well as a preparation method of the microwave dielectric ceramic PrYV2O8. The method comprises steps as follows: (1) original Pr2O3, Y2O3 and V2O5 powder with the purity higher than 99.9% (weight percentage) is weighed and prepared according to composition of the PrYV2O8; (2) the raw material in Step (1) is subjected to wet ball milling and mixing for 12 h, distilled water serves as a ball milling medium, and pre-sintering is performed in the atmosphere at the temperature of 800 DEG C for 6 h after drying; (3) a binder is added to powder obtained in Step (2), granulation and compression molding are performed, and finally, sintering is performed in the atmosphere at the temperature of 850-900 DEG C for 4 h, wherein a polyvinyl alcohol solution with the mass concentration of 5% serves as the binder and the adding amount of polyvinyl alcohol accounts for 3% of the total mass of the powder. The prepared ceramic is well sintered at the temperature lower than 900 DEG C, the dielectric constant is 11.9-12.4, the Qf (quality factor) value is up to 107000-151000 GHz, the resonance frequency temperature coefficient is low, and the ceramic has great industrial application value.
Temperature-stable ultralow-dielectric-constant microwave dielectric ceramic PrYV2O8
The invention discloses temperature-stable ultralow-dielectric-constant microwave dielectric ceramic PrYV2O8 adopting a tetragonal zirconia structure and allowing low-temperature sintering as well as a preparation method of the microwave dielectric ceramic PrYV2O8. The method comprises steps as follows: (1) original Pr2O3, Y2O3 and V2O5 powder with the purity higher than 99.9% (weight percentage) is weighed and prepared according to composition of the PrYV2O8; (2) the raw material in Step (1) is subjected to wet ball milling and mixing for 12 h, distilled water serves as a ball milling medium, and pre-sintering is performed in the atmosphere at the temperature of 800 DEG C for 6 h after drying; (3) a binder is added to powder obtained in Step (2), granulation and compression molding are performed, and finally, sintering is performed in the atmosphere at the temperature of 850-900 DEG C for 4 h, wherein a polyvinyl alcohol solution with the mass concentration of 5% serves as the binder and the adding amount of polyvinyl alcohol accounts for 3% of the total mass of the powder. The prepared ceramic is well sintered at the temperature lower than 900 DEG C, the dielectric constant is 11.9-12.4, the Qf (quality factor) value is up to 107000-151000 GHz, the resonance frequency temperature coefficient is low, and the ceramic has great industrial application value.
Temperature-stable ultralow-dielectric-constant microwave dielectric ceramic PrYV2O8
XIANG HUAICHENG (author) / TANG YING (author) / LI CHUNCHUN (author)
2015-11-25
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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