| 摘要 |
PROBLEM TO BE SOLVED: To obtain antibacterial colorless glass excellent in chemical durability and controlled releasability of an antibacterial material by incorporating an antibacterial metallic ion into an SiO2 -Mx Oy glass (M is a metallic atom with the valance number less than the coordination member, and x and y are an atomic ratio of M to O). SOLUTION: M is >=1 kind of metallic atom selected from Al, La, Y, Ti, Zr, Nb and Ta. The atomic ratio (metallic M to antibacterial metal) is controlled to >=1. The glass with Al as M and Ag as antibacterial metal, for example, is produced by mixing the solns. contg. a hydrolyzable organosilicon compd., a hydrolyzable metallic M compd., the salt of an antibacterial metal and water, gelling the mixture and calcining the gel. The antibacterial glass is produced as shown in the figure. Ethanol is added to tetraethoxysilane as a solvent. Separately, water, nitric acid, ethanol, silver nitrate and aluminum nitrate nonahydrate are mixed to form two solns. Both solns. are mixed, the mixture is agitated for 30min and hydrolyzed to obtain a sol, the sol is gelled, and the gel is dried, crushed and calcined. |
