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Ultralow-dielectric-constant dielectric ceramic Li2Zn2Si2O7 and preparation method thereof
The invention discloses temperature-stable type ultralow-dielectric-constant dielectric ceramic Li2Zn2Si2O7 and a preparation method thereof. The preparation method comprises: (1) weighing original powders of Li2CO3, ZnO and SiO2 with the purity of 99.9 wt% or more according to the formula of Li2Zn2Si2O7 and proportioning; (2) performing wet-type ball milling mixing on the raw materials of the step (1) for 12 h by selecting distilled water as a ball milling medium, baking and pre-burning at 850 DEG C in atmosphere for 6 h; and (3) adding a binder into the powder prepared in the step (2) and granulating, then performing compression molding, and finally sintering at 900-930 DEG C in atmosphere for 4 h, wherein the binder employs a polyvinyl alcohol solution with the mass concentration of 5% and the addition amount of polyvinyl alcohol is 3% by mass of the total powder. The prepared ceramic has good sintering at 900-930 DEG C, has the dielectric constant up to 11.1-11.9, has the quality factor Qf up to 110000-132000 GHz, has a small resonant-frequency temperature coefficient, and has extremely great application value in industry.
Ultralow-dielectric-constant dielectric ceramic Li2Zn2Si2O7 and preparation method thereof
The invention discloses temperature-stable type ultralow-dielectric-constant dielectric ceramic Li2Zn2Si2O7 and a preparation method thereof. The preparation method comprises: (1) weighing original powders of Li2CO3, ZnO and SiO2 with the purity of 99.9 wt% or more according to the formula of Li2Zn2Si2O7 and proportioning; (2) performing wet-type ball milling mixing on the raw materials of the step (1) for 12 h by selecting distilled water as a ball milling medium, baking and pre-burning at 850 DEG C in atmosphere for 6 h; and (3) adding a binder into the powder prepared in the step (2) and granulating, then performing compression molding, and finally sintering at 900-930 DEG C in atmosphere for 4 h, wherein the binder employs a polyvinyl alcohol solution with the mass concentration of 5% and the addition amount of polyvinyl alcohol is 3% by mass of the total powder. The prepared ceramic has good sintering at 900-930 DEG C, has the dielectric constant up to 11.1-11.9, has the quality factor Qf up to 110000-132000 GHz, has a small resonant-frequency temperature coefficient, and has extremely great application value in industry.
Ultralow-dielectric-constant dielectric ceramic Li2Zn2Si2O7 and preparation method thereof
LI JIE (author) / LI CHUNCHUN (author) / SU HEPING (author)
2015-04-01
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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