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Ultralow-dielectric-constant microwave dielectric ceramic Li3ZnBi5O11 and preparation method thereof
The invention discloses ultralow-dielectric-constant microwave dielectric ceramic Li3ZnBi5O11 sinterable at low temperature, high in quality factor and temperature stable, and a preparation method thereof. The preparation method includes: 1, weighing and blending original powders of Li2CO3, ZnO and Bi2O3 higher than 99.9% in purity (weight by percent) according to the composition of Li3ZnBi5O11; 2, mixing raw material obtained in step 1 for 12 hours by wet ball-milling using distilled water as a ball-milling medium, and after drying, pre-sintering a mixture at 700 DEG C in air for 6 hours; 3, adding adhesive into powder obtained in step 2, performing compression forming after granulating, and performing sintering at 750-800 DEG C for 4 hours, wherein the adhesive is 5% polyvinyl alcohol solution, and the polyvinyl alcohol added is 3% of total weight of the powder. The prepared ceramic is well sinterable at 800 DEG C, has a dielectric constant reaching 12.3 to 13.1, a quality factor Qf up to 77000-95000 GHz and small temperature coefficient of resonance frequency and is highly worthy of industrial application.
Ultralow-dielectric-constant microwave dielectric ceramic Li3ZnBi5O11 and preparation method thereof
The invention discloses ultralow-dielectric-constant microwave dielectric ceramic Li3ZnBi5O11 sinterable at low temperature, high in quality factor and temperature stable, and a preparation method thereof. The preparation method includes: 1, weighing and blending original powders of Li2CO3, ZnO and Bi2O3 higher than 99.9% in purity (weight by percent) according to the composition of Li3ZnBi5O11; 2, mixing raw material obtained in step 1 for 12 hours by wet ball-milling using distilled water as a ball-milling medium, and after drying, pre-sintering a mixture at 700 DEG C in air for 6 hours; 3, adding adhesive into powder obtained in step 2, performing compression forming after granulating, and performing sintering at 750-800 DEG C for 4 hours, wherein the adhesive is 5% polyvinyl alcohol solution, and the polyvinyl alcohol added is 3% of total weight of the powder. The prepared ceramic is well sinterable at 800 DEG C, has a dielectric constant reaching 12.3 to 13.1, a quality factor Qf up to 77000-95000 GHz and small temperature coefficient of resonance frequency and is highly worthy of industrial application.
Ultralow-dielectric-constant microwave dielectric ceramic Li3ZnBi5O11 and preparation method thereof
LI CHUNCHUN (Autor:in) / WANG DAN (Autor:in) / SU HEPING (Autor:in)
30.12.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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