Mechanism of Inhibition of Anatase-to-rutile Phase Transition by Phosphoric Acid-modified Titanium Dioxide

Abstract

Phosphoric acid was utilized to modify titanium dioxide, elucidating its mechanism for inhibiting the high-temperature transformation of the anatase phase into the rutile phase. The effects of sintering temperature, phosphoric acid doping amount, and initial grain size on the stability of anatase phase were evaluated. The results reveal that phosphate groups chelate to the TiO₂ surface effectively suppressed phase transition. This research provides a new insight into the mechanism by which phosphoric acid-modified TiO₂ inhibits the anatase-to-rutile phase transformation, offering theoretical support for its application in high temperature environments.

Keywords

anatase / phase transition / phosphoric acid / spatial site resistance / grain growth

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