Electrophoretic deposition of (Zn, Nb)SnO2-films varistor superficially modified with Cr3+
- Mascarenhas Morandi Lustosa, Glauco Meireles
- Campos da Costa, Joao Paulo de
- Perazolli, Leinig Antonio
- Stojanovic, Biljana D.
- Zaghete, Maria Aparecida
DOIAbstract
Recently, there has been an important rise in the research and development aimed to improve the properties of SnO2-based varistors. Meanwhile, due to fact that ZnO-based varistors possess better electrical properties compared to SnO2-based varistors, it is shown that it is needful to add additives to improve their properties. In our study, the SnO2-powder was prepared by the chemical route (Pechini method) with addition of ZnO (1 mol%) and Nb2O5 (0.05 mol%). Films were obtained by the electrophoretic deposition of SnO2-based powder, following by microwave oven sintering. Cr3+ was deposited by EPD on the films surface and thermal treatment was carried out in a microwave oven. After electrical characterization the films showed nonlinear coeff...
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