Porous glass-ceramics with bacteriostatic properties in silver-containing titanium phosphates: Control of release of silver ions from glass-ceramics into aqueous solution
- Nagoya Inst. of Tech. (Japan). Dept. of Materials Science and Engineering
Porous glass-ceramics with the surface phase consisting predominantly of AgTi{sub 2}(PO{sub 4}){sub 3} crystal and the interior phase of LiTi{sub 2}(PO{sub 4}){sub 3} crystal are prepared by exchange of Ag{sup +} ions for Li{sup +} ions. In the present work, the release of Ag{sup +} ions from glass-ceramics into aqueous solutions was investigated. Exchanged Ag{sup +} ions were chemically stable in water. The as-exchanged glass-ceramics released Ag{sup +} ions of 30--45 {micro}equiv/g into phosphate buffer solution containing Na{sup +} ions. X-ray diffraction analysis showed that silver-containing titanium phosphate crystalline phase in the glass-ceramics did not deteriorate even by heating at 900 C. The amount released from the heated glass-ceramics into the buffer solution was found to decrease drastically by 1--2 {micro}equiv/g. The heated glass-ceramics showed excellent bacteriostatic materials which have high thermal resistance and are medically safe.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 474161
- Journal Information:
- Journal of the American Ceramic Society, Vol. 80, Issue 3; Other Information: PBD: Mar 1997
- Country of Publication:
- United States
- Language:
- English
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