Dielectric Properties of TiO₂-NiO Ceramics and Its Response Mechanism

Abstract:

NiO-NiTiO3 composite ceramics were prepared by the conventional solid state reaction process and dielectric properties were investigated as a function of frequency and temperature. The results indicate that all samples showed high dielectric constant ~103 at 0.1 kHz, but a remarkable decrease of the dielectric loss appeared when the volume fraction of NiTiO3 phase reached 42.4%. Relaxor-like peaks were observed in the temperature dependence of the dielectric constant with ceramics having low composition of NiTiO3 phase (≤21.2%). The possible response mechanism associated with the microstructure and the associated defects of the composites was discussed.

• Periodical: Key Engineering Materials (Volumes 280-283)
• Pages: 115-118
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.280-283.115
• Online since: February 2007
• Authors: Jian Fei Wang, Yuan Hua Lin, Yu Chen, Lei Jiang, Ce Wen Nan
• Keywords: Associated Defects, Dielectric Property, Microstructure, NiO

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