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- W2367335087 abstract "Ultrafine mullite powders were prepared by the calcination of the mullite precursor powders obtained from water glass and aluminium nitrate via spraying_gelling method and followed by n_butanol azeotropic distillation process. TG_DTA, XRD, TEM and BET were employed to study the thermal behavior as well as the change of phase structure, specific surface area, particle size and morphology of the mullite precursor powders during calcination, and to characterize the mullite powders obtained. The results showed that ultrafine mullite powders with particle size in the range of 25nm～40nm, BET specific surface area 42.5m 2/g could be obtained by calcining mullite precursor powders at 1300℃ for 1h, and that the sequence of phase transformation of the mullite precursor powders during calcination was found to be boehmite+amorphous SiO 2→amorphous Al 2O 3+amorphous SiO 2→γ-Al 2O 3+amorphous SiO 2→3Al 2O 3·2SiO 2." @default.
- W2367335087 created "2016-06-24" @default.
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- W2367335087 date "2002-01-01" @default.
- W2367335087 modified "2023-09-25" @default.
- W2367335087 title "Preparation of Ultrafine Mullite Powders by Spraying-gelling Process" @default.
- W2367335087 hasPublicationYear "2002" @default.
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