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Microstructural, physical and mechanical behavior of pastes containing clays and alumina waste
AbstractThe purpose of this study is to analyze the influence of an aluminum oxide-rich precursor added to clays (smectite/kaolinite) during heat treatment on their mineralogical and microstructural changes, emphasizing the presence of mullite phase. Three clays were used. The samples were subjected to physical, chemical, thermal and mineralogical characterizations. Clay compositions containing alumina waste were then formulated and heat-treated at temperatures ranging from 900 to 1400°C, applying a heating rate of 5°C/min and 60min dwell time, after which mineralogical and morphological analyses were performed. The results indicated that mullite can be obtained from clay formulations containing alumina waste, and that the amount of the mullite phase formed is determined by the composition, particle size and applied temperature.
HighlightsAlumina waste contain high amount of alumina and is good precursor to form mullite.Mullite is obtained from samples composed of aluminosilicates and alumina waste.Fe element is incorporated in mullite phase to form a solid solution.Physical-mechanical properties are improved by the formation of mullite phase.
Microstructural, physical and mechanical behavior of pastes containing clays and alumina waste
AbstractThe purpose of this study is to analyze the influence of an aluminum oxide-rich precursor added to clays (smectite/kaolinite) during heat treatment on their mineralogical and microstructural changes, emphasizing the presence of mullite phase. Three clays were used. The samples were subjected to physical, chemical, thermal and mineralogical characterizations. Clay compositions containing alumina waste were then formulated and heat-treated at temperatures ranging from 900 to 1400°C, applying a heating rate of 5°C/min and 60min dwell time, after which mineralogical and morphological analyses were performed. The results indicated that mullite can be obtained from clay formulations containing alumina waste, and that the amount of the mullite phase formed is determined by the composition, particle size and applied temperature.
HighlightsAlumina waste contain high amount of alumina and is good precursor to form mullite.Mullite is obtained from samples composed of aluminosilicates and alumina waste.Fe element is incorporated in mullite phase to form a solid solution.Physical-mechanical properties are improved by the formation of mullite phase.
Microstructural, physical and mechanical behavior of pastes containing clays and alumina waste
Gonçalves, Wherllyson P. (author) / Silva, Valmir J. (author) / Menezes, Romualdo R. (author) / Neves, Gelmires A. (author) / Lira, Hélio L. (author) / Santana, Lisiane N.L. (author)
Applied Clay Science ; 137 ; 259-265
2016-12-16
7 pages
Article (Journal)
Electronic Resource
English
Microstructural, physical and mechanical behavior of pastes containing clays and alumina waste
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