Effects of Mg₂SiO₄ Addition on the Microstructure and Dielectric Properties of MgTiO₃-CaTiO₃ Ceramics

Abstract:

The Mg2SiO4-MgTiO3-CaTiO3 composite dielectric ceramics with different Mg2SiO4 addition amounts were prepared by solid state reaction method. The effects of Mg2SiO4 addition amounts on the microstructure and dielectric properties as well as sintering temperature of xMg2SiO4-(0.95-x)MgTiO3-0.05CaTiO3 (abbreviated as xMSTC, 0.25≦x≦0.75) composite ceramics were investigated. The results indicated that the sintering temperature of MgTiO3-CaTiO3 based ceramics with Mg2SiO4 addition could be lowered effectively to 1320~1340°C, and the dielectric constant decreased and dielectric loss increased gradually with the increase of Mg2SiO4 content. The 0.45MSTC ceramics containing 45 wt% Mg2SiO4 and sintered at 1340°C showed desirable dielectric properties with dielectric constant εr=13.3，dielectric loss tanδ=4.5×10-4 and temperature coefficient of relative permittivity τε =10 ppm/°C.

• Periodical: Advanced Materials Research (Volume 675)
• Pages: 200-204
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.675.200
• Online since: March 2013
• Authors: Fei Shi, Peng Cheng Du, Jing Xiao Liu, Ji Wei Wu, De Qing Chen, Xiao Li Dong, Hong Chao Ma
• Keywords: Dielectric Ceramics, Dielectric Property, Mg₂SiO₄, MgTiO₃, Solid-State Reaction

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