Dielectric Properties of TiO2-NiO Ceramics and Its Response Mechanism
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.
Wei Pan, Jianghong Gong, Chang-Chun Ge and Jing-Feng Li
J. F. Wang et al., "Dielectric Properties of TiO2-NiO Ceramics and Its Response Mechanism", Key Engineering Materials, Vols. 280-283, pp. 115-118, 2005