Preparation and property of low loss niobate microwave dielectric ceramics
ZHENG Haoran1,2, QIU Rong2,3, YANG Pan4, ZHAO Xiaofang2, YU Shihui4
1. School of Automotive and Engineering Machinery, Guangdong Communication Polytechnic, Guangzhou 510000, China; 2. International School of Microelectronics, Dongguan University of Technology, Dongguan 523000, China; 3. College of Electronics and Information Engineering, Shenzhen University, Shenzhen 518000, China; 4. School of Electrical Engineering and Automation, Luoyang Institute of Science and Technology, Luoyang 471000, China
Abstract:In order to obtain niobate-based microwave dielectric ceramics with lower loss, Zn[(Ge0.5Mo0.5)xNb1-x]2O6 (x=0.05, 0.10, 0.15, 0.20) niobate microwave dielectric ceramics were prepared by solid-state reaction method with ZnO, GeO2, MoO3, and Nb2O5 as main raw materials. XRD, SEM, and vector network analyzer were used to characterize the phase composition, microscopic morphologies, and dielectric properties of materials, respectively. The results show that when the sintering temperature is 1 180 ℃, the surface morphology of microwave dielectric ceramics with x=0.05 is the most compact, with the maximum relative density of 94.58%, and has good microwave dielectric properties, dielectric constant εr is 21.7, quality factor Qf is 64 610 GHz, and temperature coefficient of resonant frequency τf is -81.2×10-6/℃.
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