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Low-loss stable-temperature ultralow-dielectric constant microwave dielectric ceramic GdY2V3O12
The invention discloses a low-loss stable-temperature tetragonal-zirconia-structural ultralow-dielectric constant microwave dielectric ceramic GdY2V3O12 and a preparation method thereof. The preparation method comprises the following steps: (1) measuring and proportioning original powder of Gd2O3, Y2O3 and V205 with the purity of no less than 99.9wt% according to the constitution of GdY2V3O12; (2) performing wet ball milling and mixing on the raw materials in the step (1) for 12 hours by utilizing distilled water as a ball milling medium, and pre-burning for 6 hours in an atmosphere at 800 DEG C after the milled raw materials are dried; and (3) adding a binder into powder obtained in the step (2) to obtain a mixture I, granulating the mixture I, then pressing and molding, and finally sintering for 4 hours in atmosphere at 850 to 900 DEG C, wherein a 5% polyvinyl alcohol solution is adopted as the binder, and the addition amount of the polyvinyl alcohol accounts for 3 percent of the total mass of the powder. The ceramic can be well sintered at the temperature of 900 DEG C or below, the dielectric constant reaches 9.9-10.7, the quality factor Qf reaches up to 157000-191000 GHz, the resonant frequency temperature coefficient is small, and the application value in industry is vast.
Low-loss stable-temperature ultralow-dielectric constant microwave dielectric ceramic GdY2V3O12
The invention discloses a low-loss stable-temperature tetragonal-zirconia-structural ultralow-dielectric constant microwave dielectric ceramic GdY2V3O12 and a preparation method thereof. The preparation method comprises the following steps: (1) measuring and proportioning original powder of Gd2O3, Y2O3 and V205 with the purity of no less than 99.9wt% according to the constitution of GdY2V3O12; (2) performing wet ball milling and mixing on the raw materials in the step (1) for 12 hours by utilizing distilled water as a ball milling medium, and pre-burning for 6 hours in an atmosphere at 800 DEG C after the milled raw materials are dried; and (3) adding a binder into powder obtained in the step (2) to obtain a mixture I, granulating the mixture I, then pressing and molding, and finally sintering for 4 hours in atmosphere at 850 to 900 DEG C, wherein a 5% polyvinyl alcohol solution is adopted as the binder, and the addition amount of the polyvinyl alcohol accounts for 3 percent of the total mass of the powder. The ceramic can be well sintered at the temperature of 900 DEG C or below, the dielectric constant reaches 9.9-10.7, the quality factor Qf reaches up to 157000-191000 GHz, the resonant frequency temperature coefficient is small, and the application value in industry is vast.
Low-loss stable-temperature ultralow-dielectric constant microwave dielectric ceramic GdY2V3O12
LI CHUNCHUN (author) / FANG WEISHUANG (author) / TANG YING (author)
2015-11-18
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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