Electrochemistry of Crystalline Mixed Conductors: Concepts and Exampleswith SrTiO3Report as inadecuate




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Chemical and biochemical engineering quarterly, Vol.21 No.1 March 2007. -

The electrochemistry of mixed conductors is outlined. In particular the impact of grain boundaries on the transport perpendicular to the grain boundary plane is studied. Fe-doped SrTiO3 bicrystals were used as prototype mixed conductor. Experimental results obtained by

optical spectroscopy chemical diffusion and electrochemical impedance spectroscopy electrical transport are analysed in terms of continuum models. A unified approach based on the use of -chemical capacitors- is briefly explained. For the description of grain boundary, the

Schottky model acting on electronic and ionic charge carriers is used.

Mixed conductors; grain boundaries; impedance spectroscopy; chemical diffusion



Author: J. Jamnik -

Source: http://hrcak.srce.hr/



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