TiO_2の相転移に対する添加物の作用機構

概要

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The effects of various additives on the anatase-rutile transition reported by various investigators and the present authors were summarized and the mechanism of the action of additives was discussed. For the transition, although most of the additives exhibit accelerating effect, several additives such as SiO_2, H_3PO_4, Na_2SO_4, and some chlorides exhibit remarkable inhibitory effect. These accelerating and inhibitory effects could reasonably be explained by considering the following three mechanisms of the action of additives on the rutile nucleation at the surface of TiO_2: (1) The inhibitory effect caused by the prevention of mutual contact of TiO_2 particles, (2) the accelerating effect caused by structural defects induced on the surface of TiO_2 by a reaction between the additive and TiO_2, and (3) the inhibitory effect caused by a film of a stable Ti-compound phase formed on the surface of TiO_2. The first effect becomes important at low temperatures.
社団法人日本材料学会の論文
1978-07-15