TiO<SUB>2</SUB> Coating on Mica by a Homogeneous Precipitation Method
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概要
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TiO<SUB>2</SUB> hydrate coating on mica in an aqueous solution of TiOSO<SUB>4</SUB> by a homogeneous precipitation using urea was studied with emphasis on coating conditions for a uniform coating. For the uniform coating of TiO<SUB>2</SUB> film on mica surface, it was found that the deposition of a large number of TiO<SUB>2</SUB> particles on the surface at the initial stage and subsequent slow growth of them were necessary. A uniform dense film was formed under the coating conditions as follows : [(NH<SUB>2</SUB>) <SUB>2</SUB>CO], 0.1mol·dm<SUP>-3</SUP> ; [H<SUB>2</SUB>SO<SUB>4</SUB>], 0.29mol · dm<SUP>-3</SUP> ; [TiOSO<SUB>4</SUB>], 0.01mo1 · dm<SUP>-3</SUP> ; and twostep depositions for 60 min at 80°C and 30 min at 70°C. The morphology of TiO<SUB>2</SUB> film formed on mica was little affected by firing at 800°C. When TiO<SUB>2</SUB> particles were formed in the solution phase, they tented to adhere to mica, which made the surface ununiform.
- Japan Society of Colour Materialの論文