Preparation and electrical properties of the BaTiO3 nanoceramics

Robert Pązik 3,  Dariusz Hreniak 3,  Wiesław Stręk 3,  Grzegorz Paściak 2,  Jacek Chmielowiec 2,  Witold Łojkowski 

1. Polish Academy of Sciences, Institute of Low Temperature and Structure Research (INTiBS), Okólna 2, Wrocław 50-422, Poland
2. Electrotechnical Institute, Division of Electrotechnology and Materials Science (IEL), M. Skłodowskiej-Curie 55/61, Wrocław, Poland
3. Polish Academy of Sciences, Institute of Low Temperature and Structure Research (INTiBS), Okólna 2, Wrocław 50-422, Poland

Abstract

The new method of fabrication of the BaTiO3 nanoceramics obtained from the sol-gel derived nano-powders is reported. The energy band gap was estimated to be 1.26eV from the absorption reflectance spectra. Preliminary studies of the size effect on the electrical conductivity of the nanoceramics measured at different temperature are presented. Interesting phenomena was found, with increase of temperature at the range of 350-500oC the conductivity increases with the simultaneous decreasing of the grain size of nanoceramic sample. Above 500oC generally the grain size effect on the conductivity is negligible but samples with bigger grains have got slightly higher conductivity. All samples shown semiconducting properties.

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Presentation: poster at E-MRS Fall Meeting 2005, Laser Ceramic Symposium, by Robert Pązik
See On-line Journal of E-MRS Fall Meeting 2005

Submitted: 2005-07-20 13:53
Revised:   2005-07-21 13:47
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