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Coordinated regulation for α-Al2O3 and mullite structures in the alumina-mullite fiber based on the different adding form of Fe element.
- Source :
-
Journal of the European Ceramic Society . Jun2024, Vol. 44 Issue 6, p4185-4195. 11p. - Publication Year :
- 2024
-
Abstract
- The coordinated regulation for α-Al 2 O 3 and mullite structures in the alumina-mullite duplex fiber poses a challenging yet crucial task in achieving a fiber with exceptional high-temperature properties. In this study, Fe element was added into the alumina-mullite fibers in the form of iron sol and ferric nitrate solution, respectively, with the aim of obtaining a fiber consisting of fine mullite grains embedded with nano α-Al 2 O 3 grains. The results revealed that the addition of Fe element significantly enhances the crystallization process of mullite in alumina-mullite fibers. Specifically, adding iron sol resulted in the reduce of α-Al 2 O 3 formation temperature to 1300 °C, while introducing Ferric nitrate solution promoted the formation of mullite phase. Simultaneous introduction of 1.3 wt% iron sol and 1.3 wt% Ferric nitrate solution contributed to achieve alumina-mullite fiber with tensile strength of 2.06 GPa. In addition, the influence mechanism of Fe source on the phase transformation and microstructures of alumina-mullite fiber were discussed. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09552219
- Volume :
- 44
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- Journal of the European Ceramic Society
- Publication Type :
- Academic Journal
- Accession number :
- 175300543
- Full Text :
- https://doi.org/10.1016/j.jeurceramsoc.2024.01.043