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High-quality factor ultralow-dielectric constant microwave dielectric ceramic Li2Mg2V8O23
The invention discloses a high-quality factor temperature-stabilizing ultralow-dielectric constant microwave dielectric ceramic Li2Mg2V8O23 capable of being sintered at low temperatures as well as a preparation method thereof. The preparation method comprises the following steps: (1) weighing and proportioning original powder of Li2CO3, MgO and V2O5 with the purity over 99.9wt% according to composition of Li2Mg2V8O23; (2) wet-bal-milling and mixing the raw materials in the step (1) for 12 hours, wherein a ball-milling medium is distilled water, and drying and pre-sintering for 6 hours in an air atmosphere of 750 DEG C; (3) adding an adhesive into the powder prepared in the step (2) and granulating, then pressing and moulding, an finally sintering for 4 hours in an air atmosphere at 800-850 DEG C, wherein the adhesive is a 5% (mass concentration) polyvinyl alcohol solution and the additive amount of polyvinyl alcohol accounts for 3% of the total mass of the powder. The ceramic disclosed by the invention is well sintered at 850 DEG C, the dielectric constant reaches 17.4-17.9, the quality factor Of value reaches up to 110000-141000 GHz, and the temperature coefficient of resonance frequency is small. The ceramic has a huge industrial application value.
High-quality factor ultralow-dielectric constant microwave dielectric ceramic Li2Mg2V8O23
The invention discloses a high-quality factor temperature-stabilizing ultralow-dielectric constant microwave dielectric ceramic Li2Mg2V8O23 capable of being sintered at low temperatures as well as a preparation method thereof. The preparation method comprises the following steps: (1) weighing and proportioning original powder of Li2CO3, MgO and V2O5 with the purity over 99.9wt% according to composition of Li2Mg2V8O23; (2) wet-bal-milling and mixing the raw materials in the step (1) for 12 hours, wherein a ball-milling medium is distilled water, and drying and pre-sintering for 6 hours in an air atmosphere of 750 DEG C; (3) adding an adhesive into the powder prepared in the step (2) and granulating, then pressing and moulding, an finally sintering for 4 hours in an air atmosphere at 800-850 DEG C, wherein the adhesive is a 5% (mass concentration) polyvinyl alcohol solution and the additive amount of polyvinyl alcohol accounts for 3% of the total mass of the powder. The ceramic disclosed by the invention is well sintered at 850 DEG C, the dielectric constant reaches 17.4-17.9, the quality factor Of value reaches up to 110000-141000 GHz, and the temperature coefficient of resonance frequency is small. The ceramic has a huge industrial application value.
High-quality factor ultralow-dielectric constant microwave dielectric ceramic Li2Mg2V8O23
FANG LIANG (author) / WANG DAN (author) / SU HEPING (author)
2015-07-22
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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