| Texto completo | |
| Autor(es): |
Neves, Debora C. O. S.
;
da Silva, Andre L.
;
de Oliveira Romano, Roberto Cesar
;
Gouvea, Douglas
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of the European Ceramic Society; v. 40, n. 15, p. 8-pg., 2020-12-01. |
| Resumo | |
Fe2O3-doped SnO2 ceramic membranes were fabricated by an innovative approach based on interface segregation. The membranes exhibited outstanding mechanical resistance, which was attributed to doping-induced increase in the grain boundary interface area and decrease in the crystallite size. The membranes were sintered at different temperatures from 500 degrees C to 1000 degrees C. Most pore diameters were in the range of 0.01 - 0.1 mu m, and the pore diameters of both doped and undoped membranes could be well controlled by adjusting the sintering temperature without any sacrificial material. The permeability results showed that the membranes could be used for nano-, ultra-, and microfiltration applications. The mechanical resistance of Fe2O3 -doped SnO2 membranes was around three times higher than that of pristine SnO2 membranes. The compressive strength of the doped SnO2 membranes sintered at 1000 degrees C was 26.8 MPa, while that of the undoped membranes was 10.1 MPa. (AU) | |
| Processo FAPESP: | 15/50443-1 - Interfaces in ceramic processing |
| Beneficiário: | Douglas Gouvêa |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 13/23209-2 - Segregação de íons na superfície de nano-óxidos e sua influência no processo coloidal |
| Beneficiário: | Douglas Gouvêa |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |