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Impregnace keramických membrán anatasem
 Vacík, M. ; Hofman, R. ; Mastný, L. ; Šrank, Z. ; Brožek, Vlastimil
Catalytic properties of anatase have been known for a certain time but its practical usage has been hindered by technological limits of preparation of either compact massive intermediate products of various shapes which are necessary as a component of catalytic reactors or nanosized anatase powder. Our aim was to prepare ceramic membrane which would contain catalytic form of titanium oxide - i.e. anatase in its entire volume or on its surface only. Ceramic membranes of any shape (mostly tabular or piped) may be prepared by hot spattering technology. If plasma torch is used we call this process plasma spraying. The advantage of plasma spraying is in chance to provide semi-finished membranes with high dimension accuracy with defined radius of voids and/or as functionally graded materials, i.e. with changing concentration of some ceramic, metallic or combined components. The pores developed in membranes can be readily filled up with substances that allow modification of its properties. In this area, the possibility to impregnate membrane ceramic intermediates with other functional components, e.g. photocatalytic forms of titanium oxide, arises as well.
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