Dissolution of heat-treated magnesium-rich amorphous silicate fibers in a simple amino acid solution - An appendix

Abstract

This study provides the data of the concentration of released elements for the dissolution, in a glycine solution, of Mg-rich amorphous alkaline earth silicate (AES) fibers heat-treated at the temperature of 700°C. It is shown that: a) the heat treatment at 700°C facilitates the glass network dissolution of the fibers, b) the heat treatment also facilitates significantly the alkaline earth elements leaching in the fibers, c) the (Mg+Ca+Sr)/Si molar ratio of the released elements for the dissolution, in the glycine solution, of the fibers heat-treated at 700°C is within the molar ratio range for the dissolution of diopside in a buffer solution. This suggests that Mg-rich AES fibers are phase separated and form diopside-like glassy phase as the chemically less durable phase resulting from the heat treatment around 700°C.