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The invention discloses application of composite oxide as temperature-stable ultra-low dielectric constant microwave dielectric ceramic with a high quality factor. The application is realized by the following steps of firstly, weighing and blending raw powder of Li2CO3, MgO and GeO2 with the purity of 99.9 percent or over 99.9 percent (weight percentage) according to the composition of Li2MgGeO4; secondly, performing wet ball mill mixing on raw materials in the first step for 12 hours, wherein a ball milling medium is distilled water, drying and then presintering in the atmosphere of 850DEG C for 6 hours; thirdly, adding a binder in powder obtained in the second step, granulating, performing compression molding, and finally sintering in the atmosphere of 900 to 950DEG C for 4 hours, wherein the binder adopts polyvinyl alcohol solution with mass concentration of 5 percent, and the addition amount of polyvinyl alcohol accounts for 3 percent of total mass of the powder. The ceramic prepared by the invention is good in sintering property at the temperature below 950DEG C; a dielectric constant of the ceramic reaches 15.4 to 16.3, a quality factor Qf value of the ceramic is as high as 99,000 to 163,000GHz, and a temperature coefficient of resonance frequency is small; the temperature-stable ultra-low dielectric constant microwave dielectric ceramic has great application value in industry.
The invention discloses application of composite oxide as temperature-stable ultra-low dielectric constant microwave dielectric ceramic with a high quality factor. The application is realized by the following steps of firstly, weighing and blending raw powder of Li2CO3, MgO and GeO2 with the purity of 99.9 percent or over 99.9 percent (weight percentage) according to the composition of Li2MgGeO4; secondly, performing wet ball mill mixing on raw materials in the first step for 12 hours, wherein a ball milling medium is distilled water, drying and then presintering in the atmosphere of 850DEG C for 6 hours; thirdly, adding a binder in powder obtained in the second step, granulating, performing compression molding, and finally sintering in the atmosphere of 900 to 950DEG C for 4 hours, wherein the binder adopts polyvinyl alcohol solution with mass concentration of 5 percent, and the addition amount of polyvinyl alcohol accounts for 3 percent of total mass of the powder. The ceramic prepared by the invention is good in sintering property at the temperature below 950DEG C; a dielectric constant of the ceramic reaches 15.4 to 16.3, a quality factor Qf value of the ceramic is as high as 99,000 to 163,000GHz, and a temperature coefficient of resonance frequency is small; the temperature-stable ultra-low dielectric constant microwave dielectric ceramic has great application value in industry.
Temperature-stable microwave dielectric ceramic Li2MgGeO4 with high quality factor and preparation method thereof
2016-02-17
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
| European Patent Office | 2016
| European Patent Office | 2015
| European Patent Office | 2016
| European Patent Office | 2016
| European Patent Office | 2016