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Effect of La2O3 addition and O2 atmosphere on the electric properties of SnO2TiO2 |
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| Authors: | LGP Simes MR Cssia-Santos MM Oliveira E Longo JA Varela |
| Affiliation: | a Centro Multidisciplinar de Desenvolvimento de Materiais Cerâmicos (CMDMC)/LIEC, Departamento de Química, UFSCar, C.P. 676, 13565-905, São Carlos, SP, Brazil b Centro Multidisciplinar de Desenvolvimento de Materiais Cerâmicos (CMDMC)/LIEC, Instituto de Química, UNESP, C.P. 355, 14801-970, Araraquara, SP, Brazil |
| Abstract: | The electric properties of (Sn, Ti)O2 doped with 1.00 mol% CoO, 0.05 mol% Nb2O5 and x mol% La2O3 (0.25≤x≤1.00) have been studied. Sn0.25Ti0.75Co0.01Nb0.005 doped with 0.50 mol% La2O3 has a nonlinearity coefficient of 6. An increase in the concentration of La2O3 raised its resistivity, thereby altering the electric properties of the material. A thermal treatment in oxygen atmosphere increased the nonlinearity coefficient to a value of 9. |
| Keywords: | Varistor Electrical properties Oxidizing atmosphere |
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