| Revue: | Materials research |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000312924 |
| ISSN: | 1516-1439 |
| Autores: | Dibb, Alessandro1 Cilense, Mario Bueno, Paulo Roberto Maniette, Yves Varela, Jose Arana Longo, Elson |
| Instituciones: | 1Universidade Estadual Paulista "Julio de Mesquita Filho", Instituto de Quimica, Araraquara, Sao Paulo. Brasil |
| Año: | 2006 |
| Periodo: | Jul-Sep |
| Volumen: | 9 |
| Número: | 3 |
| Paginación: | 339-343 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental |
| Resumen en inglés | 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 |
| Disciplinas: | Ingeniería, Química |
| Palabras clave: | Ingeniería de materiales, Química analítica, Cerámica, Varistores, Tierras raras |
| Keyword: | Engineering, Chemistry, Materials engineering, Analytical chemistry, Ceramics, Varistors, Rare earths |
| Texte intégral: | Texto completo (Ver HTML) |
