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- W2950591915 abstract "β-Sialon (Si6 –zAlzOzN8 –z; 0 < z < 4.2] can be readily formed from halloysite clay [Al2Si2O5(OH)4·2H2O] at 1400 °C by carbothermal reduction using brown coal and nitridation. A combination of X-ray diffraction, transmission electron microscopy and 29Si and 27Al solid-state NMR are used to establish the details of the intermediate stages of the reaction. NMR clearly shows a distinct sequence of reactions of silica and mullite formed from the thermal decomposition of halloysite with carbon. The carbon initially reacts with free silica and then removes silicon from the mullite, to form a β-SiC-like phase, leaving an alumina-rich mullite framework. SiC subsequently reacts with the remaining silicon from the mullite phase to form some Si3N4 which then combines with silicon from SiC, the alumina-rich mullite and nitrogen to form β-sialon. The 29Si and 27Al NMR spectra from sialon X-phase are reported." @default.
- W2950591915 created "2019-06-27" @default.
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- W2950591915 date "2010-08-19" @default.
- W2950591915 modified "2023-09-27" @default.
- W2950591915 title "ChemInform Abstract: Solid-state NMR Examination of the Formation of β-Sialon by Carbothermal Reduction and Nitridation of Halloysite Clay." @default.
- W2950591915 cites W2056066581 @default.
- W2950591915 doi "https://doi.org/10.1002/chin.199424016" @default.
- W2950591915 hasPublicationYear "2010" @default.
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