Application of statistical methodology for the evaluation of mechanically activated phase transformation in nanocrystalline TiO2

作者：Rezaee Masih^*; Khoie Seyyed Mohammad Mousavi; Fatmehsari Davoud Haghshenas; Liu Hua Kun

来源：Journal of Alloys and Compounds, 2011, 509(36): 8912-8916.

DOI：10.1016/j.jallcom.2011.06.015

• Mechanical milling
• Polymorphic phase transformation
• Rietveld refinement method
• TiO2

Response surface methodology was employed to study the effect of three factors, namely as milling time, milling speed and ball to powder weight ratio, on the mechanical activation of polymorphic phase transformation in nanocrystalline TiO2 powder and identify the probable interactions between these factors. The response was the rutile percentage after annealing the samples. Based on the statistical analysis, ball to powder weight ratio was found as the most effective factor and just one statistically significant interaction was found between milling speed and ball to powder ratio. It was also shown that increasing the milling time has no significant effect on the phase transformation since the required activation energy for the phase transformation is unattainable under these conditions. The rutile percentage was calculated from X-ray diffraction patterns of the samples via Rietveld refinement method. Raman spectroscopy was employed to verify the phase composition analysis based on X-ray diffraction results.

• 出版日期2011-9-8