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Temperature-stable ultralow dielectric-constant microwave dielectric ceramic Na2ZnMo2O8 and preparation method thereof
The invention discloses a temperature-stable ultralow dielectric-constant microwave dielectric ceramic Na2ZnMo2O8 and a preparation method thereof. The preparation method comprises the steps of (1) weighing chemical raw materials including Na2CO3 powder, ZnO powder and MoO3 powder according to the stoichiometric equation Na2ZnMo2O8, and proportioning; (2) carrying out wet-type ball milling on the raw materials in the step (1), mixing for 12 hours, and pre-sintering in the atmosphere with the temperature of 850 DEG C for 6 hours after drying, wherein the ball milling medium is distilled water; and (3) adding an adhesive into the powder prepared in the step (2), granulating, then, carrying out compression molding, and finally, sintering at the atmosphere with the temperature of 900-950 DEG C for 4 hours, wherein the adhesive is a polyvinyl alcohol solution with the concentration of 5%, and the addition dosage of polyvinyl alcohol accounts for 3% of the total mass of the powder. The ceramic disclosed by the invention is good in sintering property at the temperature of lower than 960 DEG C, high in quality factor Qf value up to 67000-83000GHz, small in resonance frequency temperature coefficient and extremely high in application value in industry and has the dielectric constant of 13.4-14.1.
Temperature-stable ultralow dielectric-constant microwave dielectric ceramic Na2ZnMo2O8 and preparation method thereof
The invention discloses a temperature-stable ultralow dielectric-constant microwave dielectric ceramic Na2ZnMo2O8 and a preparation method thereof. The preparation method comprises the steps of (1) weighing chemical raw materials including Na2CO3 powder, ZnO powder and MoO3 powder according to the stoichiometric equation Na2ZnMo2O8, and proportioning; (2) carrying out wet-type ball milling on the raw materials in the step (1), mixing for 12 hours, and pre-sintering in the atmosphere with the temperature of 850 DEG C for 6 hours after drying, wherein the ball milling medium is distilled water; and (3) adding an adhesive into the powder prepared in the step (2), granulating, then, carrying out compression molding, and finally, sintering at the atmosphere with the temperature of 900-950 DEG C for 4 hours, wherein the adhesive is a polyvinyl alcohol solution with the concentration of 5%, and the addition dosage of polyvinyl alcohol accounts for 3% of the total mass of the powder. The ceramic disclosed by the invention is good in sintering property at the temperature of lower than 960 DEG C, high in quality factor Qf value up to 67000-83000GHz, small in resonance frequency temperature coefficient and extremely high in application value in industry and has the dielectric constant of 13.4-14.1.
Temperature-stable ultralow dielectric-constant microwave dielectric ceramic Na2ZnMo2O8 and preparation method thereof
SU CONGXUE (Autor:in) / TAN XINGLIU (Autor:in) / GONG MEILU (Autor:in)
27.01.2016
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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