| Journal: | Materials research |
| Database: | PERIÓDICA |
| System number: | 000312924 |
| ISSN: | 1516-1439 |
| Authors: | Dibb, Alessandro1 Cilense, Mario Bueno, Paulo Roberto Maniette, Yves Varela, Jose Arana Longo, Elson |
| Institutions: | 1Universidade Estadual Paulista "Julio de Mesquita Filho", Instituto de Quimica, Araraquara, Sao Paulo. Brasil |
| Year: | 2006 |
| Season: | Jul-Sep |
| Volumen: | 9 |
| Number: | 3 |
| Pages: | 339-343 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental |
| English abstract | 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 |
| Disciplines: | Ingeniería, Química |
| Keyword: | Ingeniería de materiales, Química analítica, Cerámica, Varistores, Tierras raras |
| Keyword: | Engineering, Chemistry, Materials engineering, Analytical chemistry, Ceramics, Varistors, Rare earths |
| Full text: | Texto completo (Ver HTML) |
