Synthesis, microstructure and electrical properties of Ti doped SrSnO₃

Authors: Singh, S.; Singh, P.; Parkash, O.; Kumar, D.

Source: Advances in Applied Ceramics, Volume 106, Number 5, October 2007 , pp. 231-234(4)

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Abstract:

Samples in the system SrSn_1−xTi_xO₃ were prepared by conventional solid state ceramic route for 0≤x≤0·50. Powder X-ray diffraction was performed to confirm formation of single phase solid solution. It has been found that solid solution forms only up to x=0·40. DC resistivity and Seebeck coefficient α were measured to understand electrical conduction behaviour. It has been observed that in all the compositions electrons are the major charge carriers. Scanning electron micrographs were taken to study the microstructure. It has been found that grain size is in the range of 1-5 μm. Based on the results of α and activation energy E_a of DC conduction, it is proposed that conduction occurs due to migration of O²⁻ ions through oxygen vacancies V^∞_O for all the compositions.

Keywords: PEROVSKITE OXIDES; SRSNO3; ELECTRICAL BEHAVIOUR

Document Type: Research article

DOI: 10.1179/174367607X202573