Mullite Formation by Endothermic Reaction of α-Alumina/Silica Microcomposite Particles |
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| Authors: | Keyun Wang Michael D Sacks |
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| Affiliation: | Ceramic Division, Department of Materials Science and Engineering, University of Florida, Gainesville, Florida 32611 |
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| Abstract: | The formation of mullite was investigated using microcomposite powders which consist of α-alumina cores and amorphous silica coatings. Differential thermal analysis and X-ray diffraction showed that the mullitization reaction was endothermic. In contrast, mullite forms exothermically in samples prepared by sol-gel processing. The results are shown to be consistent with available thermodynamic data for mullite formation from different alumina and silica phases. |
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