Effect of Rare Earth Oxides on the Temperature Characteristics of BaTiO₃-Based Ceramics

Abstract:

Effect of rare earth oxides (Y, Nd, Gd, Ho, Yb, Er, Pr, Dy, La, Ce) on the temperature characteristics of BaTiO3(BT)-Nb2O5-ZnO ceramics was investigated. It was found that, according to the effect on the dielectric constant peaks at 40°C and 127°C of BT ceramics, the doping rare earth oxides can be divided into three categories. The different doping effects of rare earth oxides on the temperature capacitance variation of BT ceramics can be explained by the change of the volume fraction of grain core and grain shell in the core-shell structure. BT ceramics sintered at 1140°C in air have the following properties: ε25°C>3300, tanδ≤1.0%, ρ≥1012 Ω•cm and ΔC/C(-55 to +125°C)≤±10%.

• Periodical: Key Engineering Materials (Volume 547)
• Pages: 95-99
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.547.95
• Online since: April 2013
• Authors: Bin Tang, Shu Ren Zhang, Jian Liang, Zhe Liu, Wen Chen Hu
• Keywords: Barium Titanate (BT), Core-Shell Structure, Rare Earth Oxide, Temperature Characteristics

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