Effect of La2O3 addition and O-2 atmosphere on the electric properties of SnO2TiO2
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Data
2005-04-15
Autores
Simoes, LGP
Cassia-Santos, M. R.
Oliveira, M. M.
Longo, Elson [UNESP]
Varela, José Arana [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Elsevier B.V.
Resumo
The electric properties of (Sn, Ti)O-2 doped with 1.00 mol% CoO, 0.05 mol% Nb2O5 and xmol% La2O3 (0.25 less than or equal to x less than or equal to 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. (C) 2003 Elsevier B.V. All rights reserved.
Descrição
Palavras-chave
varistor, electrical properties, oxidizing atmosphere
Como citar
Materials Chemistry and Physics. Lausanne: Elsevier B.V. Sa, v. 90, n. 2-3, p. 234-238, 2005.