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Temperature-stable and ultra-low dielectric constant microwave dielectric ceramic BaLiNd3Mo5O21
The invention discloses a temperature-stable and ultra-low dielectric constant microwave dielectric ceramic BaLiNd3Mo5O21 and a preparation method thereof. The preparation method comprises the following steps: (1) weighting raw material powder of BaCO3, Li2CO3, Nd2O3 and MoO3, each of which has a purity of 99.9% or above (in weight percentage), according to the composition of the BaLiNd3Mo5O21, and blending; (2) performing wet ball-milling mixing on the raw materials in the step (1) for 12 hours with a ball-milling medium of distilled water, drying the mixture, and pre-sintering the dried mixture at the air atmosphere of 750 DEG C for 6 hours; (3) adding a binder in the powder in the step (2), granulating, performing compression forming, and finally sintering at the air atmosphere of 800-850 DEG C for 4 hours, wherein the binder is the polyvinyl alcohol solution with the mass concentration of 5%, and the adding amount of polyvinyl alcohol accounts for 3% of the total mass of powder. The ceramic BaLiNd3Mo5O21 prepared by the invention is good in sintering performance below 850 DEG C, the dielectric constant reaches 17.9-18.7, the quality factor Qf value of the ceramic BaLiNd3Mo5O21 reaches up to 87,000-120,000 GHz, the resonant frequency temperature coefficient is low, and the ceramic BaLiNd3Mo5O21 has a great application value in the industry.
Temperature-stable and ultra-low dielectric constant microwave dielectric ceramic BaLiNd3Mo5O21
The invention discloses a temperature-stable and ultra-low dielectric constant microwave dielectric ceramic BaLiNd3Mo5O21 and a preparation method thereof. The preparation method comprises the following steps: (1) weighting raw material powder of BaCO3, Li2CO3, Nd2O3 and MoO3, each of which has a purity of 99.9% or above (in weight percentage), according to the composition of the BaLiNd3Mo5O21, and blending; (2) performing wet ball-milling mixing on the raw materials in the step (1) for 12 hours with a ball-milling medium of distilled water, drying the mixture, and pre-sintering the dried mixture at the air atmosphere of 750 DEG C for 6 hours; (3) adding a binder in the powder in the step (2), granulating, performing compression forming, and finally sintering at the air atmosphere of 800-850 DEG C for 4 hours, wherein the binder is the polyvinyl alcohol solution with the mass concentration of 5%, and the adding amount of polyvinyl alcohol accounts for 3% of the total mass of powder. The ceramic BaLiNd3Mo5O21 prepared by the invention is good in sintering performance below 850 DEG C, the dielectric constant reaches 17.9-18.7, the quality factor Qf value of the ceramic BaLiNd3Mo5O21 reaches up to 87,000-120,000 GHz, the resonant frequency temperature coefficient is low, and the ceramic BaLiNd3Mo5O21 has a great application value in the industry.
Temperature-stable and ultra-low dielectric constant microwave dielectric ceramic BaLiNd3Mo5O21
CHEN JINWU (author) / TANG YING (author) / WANG DAN (author)
2015-09-02
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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