SnO2-based varistors obtained through alternative routes of synthesis.

R. PARRA; M.S. CASTRO

Florianópolis, SC, Brasil

Congreso; V Encontro SBPMat 2006; 2006

Sociedade Brasileira de Pesquisas em Materiais

SnO2 varistors were prepared through mixing the oxides and through the Pechini method. The selected system consisted in the typical SnCoNb-composition with Fe as nonlinearity enhancer. The precursor powders were characterized with TEM and specific surface area determinations. The sintered pellets were studied with SEM, TEM, XRD, IS and current-voltage measurements.