Microwave dielectric ceramic with near-zero frequency temperature coefficient and preparation method thereof
Microwave dielectric ceramic with near-zero frequency temperature coefficient and preparation method thereof
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C04B 35/462, C04B 35/622, H01B 3/12
Tsinghua University
Gui Zhilun, Li Longtu, Yue Zhenxing, Zhao Fei
Key Words:
Microwave dielectric ceramic, near-zero frequency, temperature coefficient, preparation method
Disclosed is a microwave dielectric ceramic with near-zero frequency temperature coefficient and preparation method, wherein the ceramic has the chemical formula of Ca1-xZnxLa4Ti5O17, wherein x=0.005-0.4, the ceramic is prepared from BaCO3, ZnO, La2O3, TiO2 as raw material through wet grinding and mixing, drying into powder, calcining at 1100-1200 deg. C, wet grinding again, drying and charging polyvinyl alcohol (PVA), press forming, calcining 2-4 hours in high temperature furnace, the prepared microwave dielectric ceramics can be widely applied to the manufacture of various dielectric resonators, electric wave filters and other microwave devices.

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