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Porous Glass‐Ceramics with Bacteriostatic Properties in Silver‐Containing Titanium Phosphates: Control of Release of Silver Ions from Glass‐Ceramics into Aqueous Solution
Author(s) -
Kasuga Toshihiro,
Kume Hisashi,
Abe Yoshihiro
Publication year - 1997
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1997.tb02898.x
Subject(s) - materials science , porous glass , ceramic , aqueous solution , titanium , phosphate glass , ion , phase (matter) , porosity , chemical engineering , mineralogy , composite material , metallurgy , chemistry , doping , organic chemistry , optoelectronics , engineering
Porous glass‐ceramics with the surface phase consisting predominantly of AgTi 2 (PO 4 ) 3 crystal and the interior phase of LiTi 2 (PO 4 ) 3 crystal are prepared by exchange of Ag + ions for Li + ions. In the present work, the release of Ag + ions from glass‐ceramics into aqueous solutions was investigated. Exchanged Ag + ions were chemically stable in water. The as‐exchanged glass‐ceramics released Ag + ions of 3045 equiv/g into phosphate buffer solution containing Na + 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 μequiv/g. The heated glass‐ceramics showed excellent bacteriostatic properties. Glass‐ceramics are expected to be novel bacteriostatic materials which have high thermal resistance and are medically safe.