Influences of MnCO₃ Doping on Processing Parameters and Dielectric Properties of ZnNb₂O₆ Microwave Ceramics

Abstract:

MnCO3 was added into ZnNb2O6 ceramics to obtain excellent microwave dielectric properties. The samples were prepared by conventional solid-state reaction method. The effects of the amount of MnCO3 on sintering temperatures, ceramic densities and contraction were systematically investigated. The crystalline structure of ceramic body was analyzed by XRD. The ceramic microstructure was observed by SEM. The dielectric properties of ZnNb2O6 ceramics were measured by a vector network analyzer at microwave frequency, which showed: er = 22.65, Q×f = 36700 GHz (loaded value) and tf = -40 ppm/°C.

• Periodical: Key Engineering Materials (Volumes 280-283)
• Pages: 23-26
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.280-283.23
• Online since: February 2007
• Authors: J. Luo, Z.Y. Pang, Y.S. Lin, Zhao Xian Xiong
• Keywords: Microwave Ceramic, MnCO₃ Doping, ZnNb₂O₆

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