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http://acervodigital.unesp.br/handle/11449/36496
- Title:
- The influence of sintering process and atmosphere on the non-ohmic properties of SnO2 based varistor
- Universidade Federal de São Carlos (UFSCar)
- Universidade Estadual Paulista (UNESP)
- 0957-4522
- The non-ohmic properties of the 98.95% SnO2 + 1.0 CoO + 0.05 Nb2O5 (all in mole%) system, as well as the influence of sintering temperature and atmosphere on these properties, were characterized in this study. The maximum non-linear coefficient (alpha = 32) was obtained for a sintering temperature of 1300 degrees C in an oxygen atmosphere and this maximum is associated with the presence of O in SnO2 grain boundaries, as interface defects. Experimental results also indicate thermionic-type conduction mechanisms, which are associated with the potential barrier of Schottky or Poole-Frenkel types.
- 1-Jun-1999
- Journal of Materials Science-materials In Electronics. Dordrecht: Kluwer Academic Publ, v. 10, n. 4, p. 321-327, 1999.
- 321-327
- Kluwer Academic Publ
- http://dx.doi.org/10.1023/A:1008933004042
- Acesso restrito
- outro
- http://repositorio.unesp.br/handle/11449/36496
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