Preparation, characterization, electrical properties and giant dielectric response in (In + Nb) co-doped TiO2 ceramics synthesized by a urea chemical-combustion method
作者： Theeranuch Nachaithong , Prasit Thongbai
DOI: 10.1007/S10854-017-6871-0
关键词:
摘要: Pure rutile phase of nanocrystalline (In + Nb) co-doped TiO2 (INTO) ceramics were prepared by a chemical combustion method using urea as fuel. Dense ceramic microstructure can be obtained sintering INTO powders. Good dispersion In3+ and Nb5+ co-doping ions in the is observed. Notably, high dielectric permittivity (≈20,674) low loss tangent (≈0.054) at frequency 30 °C are achieved (In1/2Nb1/2)0.015Ti0.985O2 ceramic. Using an impedance spectroscopy, confirmed to electrically heterogeneous, consisting semiconducting insulating phases. The giant response suitably explained interfacial polarization. value attributed large resistivity phase.
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