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Mullite whiskers were successfully synthesized using coal fly ash, andalusite-sericite phyllite, NH4Al(SO4)2·12H2O and SiO2, with a slight addition of NaH2PO4·2H2O by designing composition after sintered at different temperatures. The mullite whisker morphology, structure and formation mechanism were investigated by X-ray powder diffraction (XRD) and scanning electron microscopy (SEM). The results...
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