Ceramics-Silikáty 47, (2) 56 - 62 (2003) |
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CONTROLLED CRYSTALLISATION OF TiO₂ IN ALKALI-BOROSILICATE GLASS AND ITS BACTERICIDAL PROPERTIES
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Mecner Petr 1, Krejčová Zuzana 1, Hollerová Ida 2,
Strnad Zdeněk 1
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1 Laboratory for Glass and Ceramics, Lasak Ltd.
Papírenská 25, 160 00 Prague, Czech Republic
2 Research Institute of Brewing and Malting, PLC
Lipová 15, 120 00 Prague, Czech Republic
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Keywords: Anatase, Rutile, Controlled crystallisation, Bactericidal properties
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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. |
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