Abstract
Abstract—This article describes the method for preparation of opal matrices by the sol–gel method, their drying in supercritical carbon dioxide, and the preparation of α-cristobalite with high temperature annealing. The conditions for the preparation of synthetic opal matrices and the concentration of reagents for this process are described. A supercritical operation mode of the drying of silica xerogel to produce porous matrices is proposed. The transition of SiO2 from an amorphous to a crystalline state by supercritical drying and annealing is shown. All processes were controlled by scanning electron microscopy, Raman spectroscopy, and X-ray diffraction.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have