| Journal: | Revista mexicana de física |
| Database: | PERIÓDICA |
| System number: | 000429659 |
| ISSN: | 0035-001X |
| Authors: | Olvera Sánchez, M1 Hernández, M.B1 García Villarreal, S2 Rodríguez, E1 Gómez Rodríguez, C3 Garcia Quiñonez, L.V4 Aguilar Martínez, J.A1 |
| Institutions: | 1Universidad Autónoma de Nuevo León, Facultad de Ingeniería Mecánica y Eléctrica, Apodaca, Nuevo León. México 2Universidad Autónoma de Coahuila, Facultad de Metalurgia, Monclova, Coahuila. México 3Universidad Politécnica de Apodaca, Apodaca, Nuevo León. México 4Universidad Politécnica de García, García, Nuevo León. México 5Instituto Tecnológico y de Estudios Superiores de Monterrey, Centro de Innovación y Diseño en Tecnología, Monterrey, Nuevo León. México |
| Year: | 2019 |
| Season: | Ene-Feb |
| Volumen: | 65 |
| Number: | 1 |
| Country: | México |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Analítico, teórico |
| English abstract | In this contribution, the effect of In2O3 additions on the microstructure, physical and electrical properties of the SnO2-Co3O4-Ta2O5 ceramic system was investigated. Because the effect of In2O3 has been studied typically at low levels, special attention has been paid to the effect of high levels (1 and 2 mol % In2O3) in the ceramics. Results show that up to 0.1 mol % In2O3, an increase of indium oxide content is correlated with grain size reduction and an increase of the nonlinearity coefficient (α) and breakdown voltage (E B ), producing an augmentation by a factor of 2 in the nonlinearity coefficient and an increment by a factor of 8 in the breakdown voltage. However, shrinkage (γ) and measured density are not influenced by the addition of indium oxide. For samples with 1 and 2 mol % In2O3, in non-calcined condition, In2O3 is present with cubic structure. However, in calcined specimens, In2O3 is not detected anymore and SnO2-crystal structure undergoes a change from tetragonal to cubic. These ceramic samples exhibit high resistivity, behaving like dielectric materials |
| Disciplines: | Física y astronomía |
| Keyword: | Física, Propiedades eléctricas, Varistores, Sinterización, Límites de grano |
| Keyword: | Cortocircuito, Physics, Electrical properties, Varistors, Sintering, Grain boundaries, Breakdown voltage |
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