Titanium Dioxide Flakes

Titanium dioxide flakes can be produced by breaking down a continuous film of TiO2 [5.130, 5.134]. The most efficient process is a web-coating process involving thermal hydrolysis of TiOCl2 on the web. Alternative procedures are the application of titanium alkoxide onto a smooth flat surface and cracking the resulting film into flakes by steam treatment or the application of a TiO2 sol onto a glass surface and scratching off the resulting film [5.135, 5.136].

The titanium dioxide flakes produced by these methods are not single crystal but quite porous and, lacking the mechanical support of a substrate, hence brittle. There­fore, they are not yet used in technical applications in which mechanical stress is exerted.

5.3.1.4

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