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Temperature-stable microwave dielectric ceramic Li2Mg4Si4O13 with ultra-low dielectric constant
The invention discloses a temperature-stable microwave dielectric ceramic Li2Mg4Si4O13 with an ultra-low dielectric constant, and the temperature-stable microwave dielectric ceramic Li2Mg4Si4O13 can be subjected to low-temperature sintering. The microwave dielectric ceramic is prepared through the following steps: (1) weighting original powder of Li2CO3, MgO style and SiO2 with a purity of over 99.9% (weight percentage) according to the composition of Li2Mg4Si4O13; (2) carrying out wet ball-mill mixing on the raw material obtained in the step (1) for 12 hours, and after the obtained object is dried, presintering the obtained object for 6 hours in an air atmosphere at a temperature of 900 DEG C, wherein a ball mill medium is distilled water; and (3) adding an adhesive into the powder prepared in the step (2), granulating, carrying out compression moulding, and sintering the obtained product for 4 hours in an air atmosphere at a temperature of 950-990 DEG C, wherein the adhesive is a polyvinyl alcohol solution with a mass concentration of 5%, and the addition amount of polyvinyl alcohol accounts for 3% of the total mass of the powder. The ceramic prepared according to the invention is sintered well at a temperature of 950-990 DEG C, the dielectric constant reaches 12.1-12.8, the quality factor Qf value is up to 105000-137000 GHZ, and the resonant frequency temperature coefficient is small, therefore, the ceramic has an extremely industrial application value.
Temperature-stable microwave dielectric ceramic Li2Mg4Si4O13 with ultra-low dielectric constant
The invention discloses a temperature-stable microwave dielectric ceramic Li2Mg4Si4O13 with an ultra-low dielectric constant, and the temperature-stable microwave dielectric ceramic Li2Mg4Si4O13 can be subjected to low-temperature sintering. The microwave dielectric ceramic is prepared through the following steps: (1) weighting original powder of Li2CO3, MgO style and SiO2 with a purity of over 99.9% (weight percentage) according to the composition of Li2Mg4Si4O13; (2) carrying out wet ball-mill mixing on the raw material obtained in the step (1) for 12 hours, and after the obtained object is dried, presintering the obtained object for 6 hours in an air atmosphere at a temperature of 900 DEG C, wherein a ball mill medium is distilled water; and (3) adding an adhesive into the powder prepared in the step (2), granulating, carrying out compression moulding, and sintering the obtained product for 4 hours in an air atmosphere at a temperature of 950-990 DEG C, wherein the adhesive is a polyvinyl alcohol solution with a mass concentration of 5%, and the addition amount of polyvinyl alcohol accounts for 3% of the total mass of the powder. The ceramic prepared according to the invention is sintered well at a temperature of 950-990 DEG C, the dielectric constant reaches 12.1-12.8, the quality factor Qf value is up to 105000-137000 GHZ, and the resonant frequency temperature coefficient is small, therefore, the ceramic has an extremely industrial application value.
Temperature-stable microwave dielectric ceramic Li2Mg4Si4O13 with ultra-low dielectric constant
FANG LIANG (Autor:in) / WANG DAN (Autor:in) / SU HEPING (Autor:in)
20.05.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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