Resumo

BONDARCHUK, A.; SHPOTYUK, O.; GLOT, A.  e  KLYM, H.. Current saturation in In₂O₃-SrO ceramics: a role of oxidizing atmosphere. Rev. mex. fis. [online]. 2012, vol.58, n.4, pp.313-316. ISSN 0035-001X.

Current-voltage dependence in In₂O₃-SrO ceramics contains a region where the current is increased weaker than the voltage. Such behavior is observed in oxygen atmosphere and is not registered in an inert one. Nonlinear current-voltage dependence is explained in terms of a relation between electronic processes at the grain boundaries and adsorption of oxygen in electric field. The role of adsorption processes is discussed on the basis of obtained data (current-voltage dependences, pore size distribution, secondary electron microscopy, and humidity sensitivity of conductance).

Palavras-chave : Current limiting; indium oxide ceramics; adsorption processes.

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