A/B Site Modified CaTiO3 Dielectric Ceramics for Microwave Application |
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| Authors: | Tao Liu Xing-Zhong Zhao Wen Chen |
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| Affiliation: | Department of Physics, Wuhan University, Wuhan 430072, China; Institute of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China |
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| Abstract: | (Li1/2Nd1/2)2+ substitution into the A site and (Mg1/3Ta2/3)4+ substitution into the B site of CaTiO3 ceramic were investigated, respectively. The modified CaTiO3 dielectric ceramics prepared by conventional solid-state method exhibit single perovskite structure and improved dielectric properties. Optimal microwave dielectric properties of ?r=112.6, Q × f =4480 GHz, τf=8.2 ppm/°C in Ca0.4(Li1/2Nd1/2)0.6] TiO3 and ?r=60.2, Q × f =36900 GHz, τf=?10.1 ppm/°C in CaTi0.4(Mg1/3Ta2/3)0.6] O3 are obtained, which indicates their potential for microwave application. The effects of change of crystal structure on dielectric properties are also discussed. |
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