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Temperature-stable low-dielectric constant microwave dielectric ceramic Ba2ZnGe3O9 and preparation method thereof
The invention discloses temperature-stable low-dielectric constant microwave dielectric ceramic Ba2ZnGe3O9 and a preparation method thereof. The method comprises the following steps: (1) weighing and burdening powder of analytically pure chemical raw materials BaCO3, ZnO and GeO2 according to the components of the Ba2ZnGe3O9; (2) carrying out wet ball-mill mixing on the raw materials in the step (1) for 12 hours, wherein the ball-milling medium is distilled water, and pre-sintering in an air atmosphere at 850 DEG C for 6 hours after drying; and (3) adding a binder to the powder prepared in the step (2), pelleting, pressing, molding, and finally sintering in the air atmosphere at 900-950 DEG C for 4 hours, wherein a polyvinyl alcohol solution of which the mass concentration is 5% is adopted by the binder; the polyvinyl alcohol accounts for 3% of total mass of the powder. The prepared ceramic is well sintered below 950 DEG C; the dielectric constant reaches 25.3-26.2; the quality factor Qf value reaches 75,000-128,000GHz; the resonant frequency temperature coefficient is small; the ceramic has great application value in industry.
Temperature-stable low-dielectric constant microwave dielectric ceramic Ba2ZnGe3O9 and preparation method thereof
The invention discloses temperature-stable low-dielectric constant microwave dielectric ceramic Ba2ZnGe3O9 and a preparation method thereof. The method comprises the following steps: (1) weighing and burdening powder of analytically pure chemical raw materials BaCO3, ZnO and GeO2 according to the components of the Ba2ZnGe3O9; (2) carrying out wet ball-mill mixing on the raw materials in the step (1) for 12 hours, wherein the ball-milling medium is distilled water, and pre-sintering in an air atmosphere at 850 DEG C for 6 hours after drying; and (3) adding a binder to the powder prepared in the step (2), pelleting, pressing, molding, and finally sintering in the air atmosphere at 900-950 DEG C for 4 hours, wherein a polyvinyl alcohol solution of which the mass concentration is 5% is adopted by the binder; the polyvinyl alcohol accounts for 3% of total mass of the powder. The prepared ceramic is well sintered below 950 DEG C; the dielectric constant reaches 25.3-26.2; the quality factor Qf value reaches 75,000-128,000GHz; the resonant frequency temperature coefficient is small; the ceramic has great application value in industry.
Temperature-stable low-dielectric constant microwave dielectric ceramic Ba2ZnGe3O9 and preparation method thereof
CHENG LIU (author) / FANG WEISHUANG (author) / SU HEPING (author)
2016-01-27
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
| European Patent Office | 2015
| European Patent Office | 2015
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| European Patent Office | 2015