| Texto completo | |
| Autor(es): |
Caproni, E.
;
Muccillo, R.
;
Salgado, L
;
Filho, FA
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Materials Science Forum; v. 530-531, p. 2-pg., 2006-01-01. |
| Resumo | |
ZrO2: 3mol% Y2O3 powders were mixed in different proportions to ZrO2: 8 Mot% MgO, pressed and sintered at 1500 degrees C for producing composites with oxygen ion conductivity better than that of ZrO2: 8 mol% MgO and thermal shock resistance better than that of ZrO2: 3 Mot% Y2O3 The electrical conductivity was evaluated by the impedance spectroscopy technique at 600 degrees C as a function of the partial pressure of oxygen using zirconia-based oxygen pump and sensor. The thermal shock resistance was studied by room temperature-1550 degrees C dilatometry on sintered pellets. Moreover the composites were studied by X-ray diffraction and scanning electron microscopy. All composites are partially stabilized in the monoclinic-tetragonal phase and the apparent density is higher than 90% of the theoretical density. The thermal shock behavior of the composites is similar to that of ZrO2:8 mot% MgO materials used in disposable high temperature oxygen sensors. The electrical response of the composites at high temperatures is better than the electrical response of ZrO2:8 mot% MgO. (AU) | |
| Processo FAPESP: | 98/14324-0 - Multidisciplinary Center for Development of Ceramic Materials |
| Beneficiário: | Elson Longo da Silva |
| Modalidade de apoio: | Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs |
| Processo FAPESP: | 99/10798-0 - Estudo de fenômenos intergranulares em óxidos cerâmicos |
| Beneficiário: | Reginaldo Muccillo |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 03/07331-0 - Estudo de eletrólitos sólidos cerâmicos a base de óxido de zircônio para a detecção de teor de oxigênio |
| Beneficiário: | Érica Caproni |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |