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High-quality-factor temperature-stable microwave dielectric ceramic Li2ZnGe2O6 and preparation method thereof
The invention discloses high-quality-factor temperature-stable microwave dielectric ceramic Li2ZnGe2O6 and a preparation method thereof. The preparation method comprises the following steps: (1) weighing and blending initial powder of Li2CO3, ZnO and GeO2 of which the purity reaches 99.9% by weight percent according to a composition of Li2ZnGe2O6; (2) conducting wet-type ball milling on the raw materials obtained in the step (1) for 12 hours, and carrying out 6 hours' pre-sintering in an atmosphere of 800 DEG C after drying, wherein distilled water is adopted as a ball milling medium; (3) adding a bonding agent into the powder obtained in the step (2) for pelletization, carrying out compression moulding, and finally carrying out 4 hours' sintering in an atmosphere of 850-900 DEG C, wherein a polyvinyl alcohol solution with the mass concentration of 5% is adopted as the bonding agent, and the adding amount of polyvinyl alcohol accounts for 3% of the total mass of the obtained powder. The prepared microwave dielectric ceramic can be well sintered at 900 DEG C or below, the dielectric constant reaches 15.7-16.9, the quality factor, namely the Qf value, reaches up to 91000-155000 GHz, the temperature coefficient of resonance frequency is small, and the industrial application value is high.
High-quality-factor temperature-stable microwave dielectric ceramic Li2ZnGe2O6 and preparation method thereof
The invention discloses high-quality-factor temperature-stable microwave dielectric ceramic Li2ZnGe2O6 and a preparation method thereof. The preparation method comprises the following steps: (1) weighing and blending initial powder of Li2CO3, ZnO and GeO2 of which the purity reaches 99.9% by weight percent according to a composition of Li2ZnGe2O6; (2) conducting wet-type ball milling on the raw materials obtained in the step (1) for 12 hours, and carrying out 6 hours' pre-sintering in an atmosphere of 800 DEG C after drying, wherein distilled water is adopted as a ball milling medium; (3) adding a bonding agent into the powder obtained in the step (2) for pelletization, carrying out compression moulding, and finally carrying out 4 hours' sintering in an atmosphere of 850-900 DEG C, wherein a polyvinyl alcohol solution with the mass concentration of 5% is adopted as the bonding agent, and the adding amount of polyvinyl alcohol accounts for 3% of the total mass of the obtained powder. The prepared microwave dielectric ceramic can be well sintered at 900 DEG C or below, the dielectric constant reaches 15.7-16.9, the quality factor, namely the Qf value, reaches up to 91000-155000 GHz, the temperature coefficient of resonance frequency is small, and the industrial application value is high.
High-quality-factor temperature-stable microwave dielectric ceramic Li2ZnGe2O6 and preparation method thereof
FANG WEISHUANG (author) / CHENG LIU (author) / SU HEPING (author)
2016-02-03
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
| European Patent Office | 2015
| European Patent Office | 2016
| European Patent Office | 2016
| European Patent Office | 2016
| European Patent Office | 2016