High-pressure phases of SiO2 made in air by Fedoseev–Derjaguin laser process

Publisher Website
Google Scholar
Abstract
Exposure of a falling stream of 1 μm average size α‐quartz particles to a continuous wave or pulsed CO2 laser beam in air resulted in the formation of a complete series of high‐pressure phases of silica: coesite, stishovite, and apparently even denser forms with α‐PbO2 and Fe2N structures. Since the laser exposure technique works with the carbon black to diamond transition, the technique is confirmed as a simple and generally applicable means to achieve the same effects as exposure to several hundred kilobars pressure.