| Abstract
| - Two different SiO2−CaO−P2O5 glasses have been synthesized by the sol−gel method, andthe stabilization of the gel glasses was carried out at temperatures between 500 and 800°C. The different thermal treatments lead to changes in the structural and texturalproperties. When the glasses were soaked in a buffered solution, the activation energy forcalcium release increased with the stabilization temperature. The changes in the siliconrelease were found to be closely related to the changes in textural properties and networkdensity. The evolution of such changes depended on the chemical composition of the glasses.As an assumption, the differences in behavior between both compositions can be explainedin terms of the chemical structure of the glasses. The Ca/Si ratio appears to play afundamental role in this behavior.
|
