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Low-loss temperature-stable type middle-dielectric-constant microwave dielectric ceramic Li2Nd4Ti2O11
The invention discloses low-loss temperature-stable type middle-dielectric-constant microwave dielectric ceramic Li2Nd4Ti2O11 and a preparation method thereof. The preparation method includes the steps that 1, original powder of Li2CO3, Nd2O3 and TiO2 with the purity higher than 99.9% (weight percentage) is weighed and dosed according to the composition of Li2Nd4Ti2O11; 2, the raw materials in the step 1 are subjected to wet type ball-milling and mixing for 12 hours, a ball-milling medium is distilled water, and the raw materials are pre-sintered for 6 hours in the air atmosphere of 870 DEG C after being dried; 3, after binder is added to the powder obtained in the step 2 and pelleting is conducted, the powder is pressed and formed, and finally sintered for 4 hours in the air atmosphere of 920-970 DEG C, wherein the binder is prepared from a polyvinyl alcohol solution with the mass concentration of 5%, and the addition amount of polyvinyl alcohol accounts for 3% of the total mass of the powder. The prepared ceramic is well sintered at the temperature below 970 DEG C, the dielectric constant reaches 35.7 to 36.9, the quality factor Qf value reaches up to 74,000 GHz to 113,000 GHz, the resonant frequency temperature coefficient is small, and high application value is achieved industrially.
Low-loss temperature-stable type middle-dielectric-constant microwave dielectric ceramic Li2Nd4Ti2O11
The invention discloses low-loss temperature-stable type middle-dielectric-constant microwave dielectric ceramic Li2Nd4Ti2O11 and a preparation method thereof. The preparation method includes the steps that 1, original powder of Li2CO3, Nd2O3 and TiO2 with the purity higher than 99.9% (weight percentage) is weighed and dosed according to the composition of Li2Nd4Ti2O11; 2, the raw materials in the step 1 are subjected to wet type ball-milling and mixing for 12 hours, a ball-milling medium is distilled water, and the raw materials are pre-sintered for 6 hours in the air atmosphere of 870 DEG C after being dried; 3, after binder is added to the powder obtained in the step 2 and pelleting is conducted, the powder is pressed and formed, and finally sintered for 4 hours in the air atmosphere of 920-970 DEG C, wherein the binder is prepared from a polyvinyl alcohol solution with the mass concentration of 5%, and the addition amount of polyvinyl alcohol accounts for 3% of the total mass of the powder. The prepared ceramic is well sintered at the temperature below 970 DEG C, the dielectric constant reaches 35.7 to 36.9, the quality factor Qf value reaches up to 74,000 GHz to 113,000 GHz, the resonant frequency temperature coefficient is small, and high application value is achieved industrially.
Low-loss temperature-stable type middle-dielectric-constant microwave dielectric ceramic Li2Nd4Ti2O11
FANG WEISHUANG (author) / TANG YING (author) / WANG DAN (author)
2016-01-27
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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