The Influence of AST Doping on the Dielectric Properties of MgTiO₃-Based Ceramics Fabricated by Soild-State Sintering

Abstract:

AST-doped ZnO-MgTiO3-SrTiO₃ ceramics were prepared using a solid-state sintering process. The effects of AST (Al2O3-SiO2-TiO2) on the dielectric properties of MgTiO₃-based ceramics were investigated. The results indicate that AST-doped MgTiO3-based ceramics could be obtained after 1205~1280°C sintering for 3 h. The XRD results indicate that the obtained MgTiO₃-based ceramics contain high percentage of MgTi2O5 phase and the percentage increased with the increase of AST content. It was found that the occurred liquid-phase sintering by adding AST glass could effectively lower the sintering temperature and decrease the dielectric loss of MgTiO₃-based ceramics. A minimum tanδ of 1.5×10-4 associated with εr=19.0 was achieved for 6.0 wt% AST-doped samples sintered at 1255°C.

• Periodical: Advanced Materials Research (Volumes 634-638)
• Pages: 2378-2382
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.634-638.2378
• Online since: January 2013
• Authors: Chun Yuan Luo, Jing Xiao Liu, Fei Shi, Ji Wei Wu, Chao Qian, Peng Cheng Du
• Keywords: AST, Dielectric Ceramics, Glass, MgTiO₃, Sintering

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