8-10 June 2016
Asia/Bangkok timezone

Colossal Dielectric Permittivity in (A3+,Nb5+) doped TiO2; A3+ = Cr3+ and Sc3+

Jun 9, 2016, 11:45 AM
Room Th

Room Th

Oral presentaion Material Physics, Nanoscale Physics and Nanotechnology Session XXII


Noppakorn Thanamoon


(Cr,Nb)TiO2 (CN-T) and (Sc,Nb)TiO2 (SN-T) ceramics were prepared via a solid state reaction process. A single phase of rutile TiO2 was confirmed by X-ray diffraction (XRD). Dielectric properties were investigated over frequency range from 40Hz to 10MHz and temperature range from -70C to 220C. The ceramics showed high permittivities (>1000) with low dielectric losses and frequency-stablity. The behaviors of colossal permittivity can be explained by electron-pinned defect-dipoles, interfacial polarization and polaron hopping polarization.

Primary author


Dr Prasit Thongbai (Advisor)

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