Publicação: Evaluation of rare earth oxides doping SnO2.(Co1/4,Mn3/4)O-based varistor system
Carregando...
Data
Orientador
Coorientador
Pós-graduação
Curso de graduação
Título da Revista
ISSN da Revista
Título de Volume
Editor
ABM, ABC, ABPol
Tipo
Artigo
Direito de acesso
Acesso aberto
Resumo
The present paper aims to verify the inuence of rare earth oxide such as lanthanum (La2O3) and neodymium (Nd2O3) doping SnO2 + 0.25%CoO + 0.75%MnO2 + 0.05%Ta2O5 system. The analysis focus on microstructural inuence on electrical properties. Microstructural analysis were made by using Transmission Electron Microscopy (TEM) at different regions of the samples. From such analysis it was found that La2O3 and Nd2O3 oxides cause heterogeneous segregation and precipitation at grain boundary concerning cobalt and manganese, decreasing the nonohmic electrical properties, as discussed, likely due to the increasing of grain boundary non-active potential barriers.
Descrição
Palavras-chave
ceramic, varistor, tin dioxide, rare earth oxides
Idioma
Inglês
Como citar
Materials Research. ABM, ABC, ABPol, v. 9, n. 3, p. 339-343, 2006.
