Ceramics-Silikáty 47 (2) 56-62 (2003)

CONTROLLED CRYSTALLISATION OF TiO₂ IN ALKALI-BOROSILICATE GLASS AND ITS BACTERICIDAL PROPERTIES

P. MECNER, Z. KREJČOVÁ, I. HOLLEROVÁ, Z. STRNAD

The influence of thermal processing on TiO₂ crystallisation in alkali-borosilicate glass was investigated applying differential thermal analysis, X-ray diffraction analysis and electron microscopy. The surfaces of the samples prepared by both volume and surface TiO₂ crystallisation were evaluated from the viewpoint of their respective bactericidal properties. A polycrystalline material with anatase forming the only crystalline phase with crystal size ranging from 0.01 to 0.5 µm, was prepared by controlled, volume glass crystallisation. The bactericidal effect was demonstrated on fracture surfaces of a mechanically ground sample of crystallized glass.

Keywords: Anatase, Rutile, Controlled crystallisation, Bactericidal properties.