Complex Impedance Study of Fine and Coarse Grain TiO2 Ceramics

Author

• Sheng Chao
• Vladimir Petrovsky
• Fatih Dogan, Missouri University of Science and TechnologyFollow

Abstract

Titanium dioxide (TiO₂) ceramics with various grain sizes were investigated by impedance spectroscopy techniques. Dielectric loss peak identified in coarse grain TiO₂ was attributed to space charge polarization occurring at the grain boundaries. Electric modulus representation of the impedance data showed two types of relaxation processes in coarse grain TiO₂, whereas only one type was observed in fine grain TiO₂. Long-range migration of oxygen vacancies was found to be the dominant conduction mechanism for fine grain TiO₂, while electron hopping between localized states was attributed to dielectric relaxation in coarse grain TiO₂.

Recommended Citation

S. Chao et al., "Complex Impedance Study of Fine and Coarse Grain TiO2 Ceramics," Journal of the American Ceramic Society, vol. 93, no. 10, pp. 3031 - 3031, Blackwell Publishing Inc., Oct 2010.

The definitive version is available at https://doi.org/10.1111/j.1551-2916.2010.04008.x

Department(s)

Materials Science and Engineering

Publication Status

Full Access

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2026 The American Ceramic Society, All rights reserved

Publication Date

2010-10-01