Donor Solid Solubility and Microstructure of Nb-Doped TiO₂ Ceramic Varistor

Abstract:

In this paper, the effect of sintering temperature on microstructure and donor solid solubility of Nb-doped TiO₂ varistor ceramic is investigated. SEM and EDXS were carried out to study the microstructure and chemical compositions of TiO₂ grain. The results show that the TiO₂ sample sintered at 1350°C have better microstructure and properties. The grains size of the TiO₂ sample is about 15μm and solid solubility of donor Nb ⁵⁺ cation solute in TiO₂ grains is 1.49mol%.

• Periodical: Key Engineering Materials (Volumes 512-515)
• Pages: 1273-1276
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.512-515.1273
• Online since: June 2012
• Authors: Rui Jiao Jia, Ji Kang Yan, Guo You Gan, Jing Hong Du, Jian Hong Yi
• Keywords: Microstructure, SEM, Sintering Temperature, Solid Solubility, TiO₂

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