Synthesis and Characterization of Ti, Fe-Doped Mullite-I

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Abstract:

A series of gels with 3Al2O3•2SiO2 were prepared by Sol-gel method and heated at several temperatures for 2 h to synthesize Ti, Fe-doped mullite. The powers were characterized by differential thermal analysis (DSC-TG) and X-ray powder diffraction (XRD). Phase separation was promoted by doping both TiO2 and Fe2O3; with increasing the amount of dopant ions the formation temperature of Si-Al spinel decreased and the formation temperature of mullite increased by TiO2 doping but decreased by Fe2O3 doping. The formation temperature of pure mullite was about 1250-1350 °C.

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Advanced Materials Research (Volumes 217-218)

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163-168

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March 2011

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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