Structure and Antibacterial Property of ZnO-B2O3-P2O5 Glasses

The glass structure and antibacterial properties of (65-x)ZnO-xB 2 O 3 -35P 2 O 5 glasses were investigated. Zinc borophosphate glasses were prepared using a conventional melt-quenching technique at 1000C. Glass transition temperature and CTE were studied and the structure of zinc borophosphate glasses was evaluated by FTIR. The Zn 2+ state increase with increasing ZnO content was investigated by XPS and a single sharp Zn 2P 3/2 peak was confirmed, showing that Zn 2P 3/2 exists as Zn 2+ . In order to to evaluate the antimicrobial activity, Escherichia coli (E. coli) was used following the Japanese Industrial Standard JIS Z 2801; the E. coli death rate was found to increase with increasing Zn 2+ content of glasses.