The effect of small P2O5 additions on the acid corrosion behavior of lead silicate glass was studied at 22°C. Crystals of penta‐lead phosphosilicate, a phase heretofore synthesized only by high‐temperature melt techniques, formed on the surface of the phosphate‐doped glass during the corrosion process. No crystals were observed to form on the pure lead silicate glass. Crystallization appears to result from the controlled release of phosphorus and lead at the glass surface and/or from the reactive catalytic properties of a silica gel surface film. Apparent lead diffusion rates into the acid solution for the phosphate‐doped lead silicate glass are much less (by a factor of 11,3) than for the pure lead silicate glass. Application of these findings is suggested in two areas: formulation of low cation‐release glass and glaze compositions and the synthesis of high‐temperature phases in aqueous solution at ambient temperatures.
|Original language||English (US)|
|Number of pages||5|
|Journal||Journal of the American Ceramic Society|
|State||Published - Jan 1 1982|
All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Materials Chemistry