| Full text | |
| Author(s): |
Salomao, Rafael
;
Fernandes, Leandro
Total Authors: 2
|
| Document type: | Journal article |
| Source: | Journal of the European Ceramic Society; v. 37, n. 8, p. 2849-2856, JUL 2017. |
| Web of Science Citations: | 5 |
| Abstract | |
Porous materials produced from sintered Al(OH)(3) show a potentially useful alpha-Al2O3-based coral-like co-continuous microstructure of high porosity (above 70%) and chemical resistance. However, due to the lack of efficient connections among the particles of the solid phase, their poor mechanical properties limit their use in biomechanical and thermo-mechanical applications, as scaffolds for bone tissue and hot air filters, respectively. In this study, authors improved these connections reinforcing the structure with a sintering aid (synthetic amorphous silica, SAS). Al(OH)3 particles (previously sintered at 1500 degrees C, 5 h) were imbibed with SAS particles, compacted and sintered at 1300 degrees C, which generated a coral-like mullite-based porous structure. The porosity levels of the material (47%) were similar to those of the initial green state (50%) and achieved high levels of mechanical properties (flexural strength of 50.29 MPa, elastic modulus of 26.00 GPa), with small linear thermal shrinkage (lower than 6% at 1500 degrees C). (C) 2017 Elsevier Ltd. All rights reserved. (AU) | |
| FAPESP's process: | 10/19274-5 - Novel methodology for hydrotalcite (Mg6Al2(OH)16CO3.4H2O) synthesis from aqueous suspensions of magnesium oxide (MgO) and aluminum hydroxide (Al(OH)3) and its application in porous ceramics for high temperature thermal insulation |
| Grantee: | Rafael Salomão |
| Support Opportunities: | Research Grants - Young Investigators Grants |