| Título: | Effect of Cr(2)0(3) on the microstructure and non-ohmic properties of (Co, Sb)-doped SnO2 varistors |
| Autores: |
Aguilar-Martínez,J.A Pech-Canul,M.I. Hernández,M.B. Glot,A.B. Rodríguez,E. García Ortiz,L. |
| Fecha: | 2013-02-01 |
| Publicador: | SCIELO |
| Fuente: |
 |
| Tipo: | journal article |
| Tema: |
Varistor breakdown voltage nonlinearity |
| Descripción: | The effect of Cr2O3 addition on the physical characteristics, microstructure, and current-voltage properties of (Co-Sb)-doped SnO2 varistors was investigated. SnO2-Co3O4-Sb2O5 ceramics with additions of 0.0, 0.03, 0.05 and 0.07 mol % Cr2O3 were sintered at 1350 ºC under ambient atmosphere and characterized microstructurally and electrically. The characterization by XRD and SEM show that the microstructure remains as a single phase material with multimodal size distribution of SnO2 grains. The greatest effect of Cr2O3additions is manifested in the electric breakdown field. Additions of high levels (0.07 and 0.05 %) of this oxide promote an increase of approximately 55% in this parameter compared to the Cr2O3-free sample. Another physical property is affected: the measured density values decreases as the Cr2O3 content increases. A change in the nonlinearity coefficient value is produced only at the highest Cr2O3 content while at intermediate levels there is not change at all. Consequently, when seeking high nonlinearity coefficients, intermediate levels of Cr2O3 are not recommended. |
| Idioma: | Inglés |
1 | 6 Fracturas maxilofaciales y factores asociados en derechohabientes del IMSS Campeche, México: Análisis retrospectivo 1994-1999 por Medina-Solis,Cario Eduardo,Córdova-González,José Luis,Casanova-Rosado,Alejandro José,Zazueta-Hernández,Maria Alejandra |
2 | 7 Factores de riesgo de mortalidad en el hijo de madre toxémica por Gómez-Gómez,Manuel,Danglot-Banck,Cecilia,García-de la Torre,Guadalupe Silvia,Antonio-Ocampo,Abdiel,Fajardo-Gutiérrez,Arturo,Sánchez-García,Maria Luisa,Ahumada-Ramírez,Elias |
3 Cerámicas mexicanas para cicatrización de piel por Piña-Barba,María Cristina,Tejeda-Cruz,Adriana,Regalado-Hernández,Miguel Ángel,Arenas-Reyes,María Isabel,Martín-Mandujano,Salvador,Montalvo,César | 8 I. De la enseñanza tutoral al aprendizaje a distancia por Cravioto,Alejandro |
4 Seguimiento de egresados de un diplomado en enseñanza de la Medicina por Ponce de León-Castañeda,Ma. Eugenia,Ruíz-Alcocer,Ma. del Carmen,Lozano-Sánchez,J. Rogelio | 9 II. La vocación científica: compromisos con el cambio permanente y la educación continua por Kretschmer,Roberto |
5 Primer estudio de teledermatología en México: Una nueva herramienta de salud pública por Lepe,Verónica,Moneada,Benjamín,Castanedo-Cázares,Juan Pablo,Martínez-Rodríguez,Alejandra,Mercado-Ceja,Sergio M,Gordillo-Moscoso,Antonio | 10 |