Study of the biocidal properties of R^sub 2^O-RO-TiO2-P^sub 2^O^sub 5^-R^sub 2^O3-SiO2 glass ceramic coatings

It is found that the most informative and universal method of determining the biocidal properties of glass coatings is a quantitative method that takes account of the level of growth of biotest microorganisms seeded in liquid nutrients. It is shown that biocidality with respect to the bacteria Escherichia coli and the fungi Candida albicans of glass ceramic and composite glass coatings based on Na^sub 2^O-CaO-ZnO-TiO2-Al^sub 2^O3-P^sub 2^O^sub 5^-B^sub 2^O3-SiO2 glass is determined by the presence of calcium phosphates, zinc titanates, the bactericidal filler zinc phosphate in their structure. Depending on their inhibiting action biocidal glass ceramic and composite glass coatings can be used to protect different kinds of steel enamelware.[PUBLICATION ABSTRACT]