Nonohmic behavior of SnO2.MnO2-based ceramics
AUTOR(ES)
Orlandi, Marcelo O., Bueno, Paulo Roberto, Leite, Edson Roberto, Longo, Elson
FONTE
Materials Research
DATA DE PUBLICAÇÃO
2003-06
RESUMO
The present paper describes the nonohmic behavior of the SnO2.MnO-based system and analyzes the influence of the sintering time and the Nb2O5 concentration on this system's electrical properties. A nonlinear coefficient of ~7 was obtained for a 0.2 mol%-doped Nb2O5 composition, which is comparable to other values reported in the literature for the ternary SnO2-based systems. A recent barrier formation model proposed in the literature to explain the nonlinear electrical behavior of SnO2-based systems is used to clarify the role of the MnO constituent in the formation of the barrier, taking into account the influence of segregated atoms, precipitated phase and oxygen species in the grain boundary region.
Documentos Relacionados
- Caracterização de sistemas varistores a base de SnO2-MnO2.
- Electronic ceramics based on polycrystalline SnO2, TiO2 and (Sn xTi1-x)O2 solid solution
- Evaluation of rare earth oxides doping SnO2.(Co1/4,Mn3/4)O-based varistor system
- The effect of Cr concentration and preparation method on the microstructure and electrical characterization of SnO2-based ceramics
- Desenvolvimento de varistores à base de SnO2 para aplicação em redes de alta tensão = Development of SnO2-based varistors for high voltage application