| Full text | |
| Author(s): |
Storion, Ana G.
[1]
;
Lavagnini, Isabela R.
[1]
;
Campos, V, Joao
;
da Silva, Joao G. P.
[2]
;
Maestrelli, Sylma C.
[3]
;
Pallone, Eliria M. J. A.
[4, 5]
Total Authors: 6
|
| Affiliation: | [1] Univ Sao Paulo, Postgrad Programme Mat Sci & Engn, USP FZEA, Av Duque Caxias Norte 225, BR-13635900 Pirassununga - Brazil
[2] Forschungszentrum Julich, Inst Energy & Climate Res IEK 1, D-52425 Julich - Germany
[3] Univ Fed Alfenas, Jose Aurelio Vilela, 11999, Cidade Univ, BR 267, Km 5, BR-37715400 Pocos De Caldas, MG - Brazil
[4] Univ Sao Paulo, Fac Anim Sci & Food Engn FZEA, Dept Biosyst Engn, BR-13635900 Pirassununga, SP - Brazil
[5] Campos, Joao, V, Univ Sao Paulo, Postgrad Programme Mat Sci & Engn, USP FZEA, Av Duque Caxias Norte 225, BR-13635900 Pirassununga - Brazil
Total Affiliations: 5
|
| Document type: | Journal article |
| Source: | Journal of the European Ceramic Society; v. 41, n. 15, p. 7807-7815, DEC 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
The present work aimed to reduce the microstructure heterogeneity inherent to flash sintering by using alumina blankets as a thermal insulator around ZnO cylindrical samples during the sintering process, under different electric field conditions. Thermal insulation significantly reduced the flash onset temperature and the grain size heterogeneity. For higher electric fields, a temperature reduction as high as 480 degrees C was observed, which also led to lower densification. These findings were discussed in terms of changes in the heat loss dynamics coupled with the adsorbed water retention, both promoted by the applied thermal insulation. A model to estimate the temperature at stage III of flash sintering was proposed. The final temperature reached with thermal insulation did not differ significantly from the ones without it. Thus, thermal insulation could represent an alternative route to flash sinter materials with lower furnace temperatures with energy savings up to 78 % and a more homogeneous microstructure. (AU) | |
| FAPESP's process: | 18/11143-0 - Influence of flash sintering parameters on ZnO densification and microstructure |
| Grantee: | Ana Gabriela Storion |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 19/14677-9 - Influence of the Multi Step Flash Sintering technique on the microstructural control of ZrO2 |
| Grantee: | Eliria Maria de Jesus Agnolon Pallone |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 18/04331-5 - Instrumentation and automation of a furnace adapted to flash sintering |
| Grantee: | João Vitor Campos |
| Support Opportunities: | Scholarships in Brazil - Doctorate (Direct) |