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Microwave dielectric ceramic Li4La3Nb3O14 with medium dielectric coefficient and preparation method of microwave dielectric ceramic Li4La3Nb3O14
The invention discloses low-temperature sintered temperature-stable type microwave dielectric ceramic Li4La3Nb3O14 with a medium dielectric coefficient and a preparation method of the microwave dielectric ceramic Li4La3Nb3O14. The preparation method comprises steps as follows: (1), original powder of Li2CO3, La2O3 and Nb2O5 with the purity higher than 99.9% in percentage by weight is weighed in the composition proportion of Li4La3Nb3O14 and mixed; (2), the raw material in the step (1) is subjected to wet type ball milling and mixing in distilled water serving as a ball milling medium for 12 hours and pre-sintered for 6 hours in an air atmosphere with the temperature of 850 DEG C after being dried; (3), a binder is added to powder prepared in the step (2), the mixture is granulated, pressed to be shaped and sintered for 4 hours in the air atmosphere with the temperature ranging from 900 DEG C to 950 DEG C, the binder adopts a polyvinyl alcohol solution with the mass concentration being 5%, and the adding quantity of the polyvinyl alcohol solution accounts for 3% of the total mass of the powder. The prepared ceramic is well sintered under 960 DEG C, the dielectric coefficient reaches 36.1-37.2, the Qf (quality factor) of the ceramic is as high as 55,000-73,000 GHz, the temperature coefficient of resonance frequency is low, and the ceramic has great application value in industry.
Microwave dielectric ceramic Li4La3Nb3O14 with medium dielectric coefficient and preparation method of microwave dielectric ceramic Li4La3Nb3O14
The invention discloses low-temperature sintered temperature-stable type microwave dielectric ceramic Li4La3Nb3O14 with a medium dielectric coefficient and a preparation method of the microwave dielectric ceramic Li4La3Nb3O14. The preparation method comprises steps as follows: (1), original powder of Li2CO3, La2O3 and Nb2O5 with the purity higher than 99.9% in percentage by weight is weighed in the composition proportion of Li4La3Nb3O14 and mixed; (2), the raw material in the step (1) is subjected to wet type ball milling and mixing in distilled water serving as a ball milling medium for 12 hours and pre-sintered for 6 hours in an air atmosphere with the temperature of 850 DEG C after being dried; (3), a binder is added to powder prepared in the step (2), the mixture is granulated, pressed to be shaped and sintered for 4 hours in the air atmosphere with the temperature ranging from 900 DEG C to 950 DEG C, the binder adopts a polyvinyl alcohol solution with the mass concentration being 5%, and the adding quantity of the polyvinyl alcohol solution accounts for 3% of the total mass of the powder. The prepared ceramic is well sintered under 960 DEG C, the dielectric coefficient reaches 36.1-37.2, the Qf (quality factor) of the ceramic is as high as 55,000-73,000 GHz, the temperature coefficient of resonance frequency is low, and the ceramic has great application value in industry.
Microwave dielectric ceramic Li4La3Nb3O14 with medium dielectric coefficient and preparation method of microwave dielectric ceramic Li4La3Nb3O14
FANG WEISHUANG (author) / WANG DAN (author) / LI CHUNCHUN (author)
2015-12-23
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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