What is it about?
Silica glass will undergo density increase when exposed to pressure. At ambient temperature, density increase begins near 9 GPa and reaches maximum density increase of 21% near 20 GPa. This density increase is well-calibrated and can be used to determine the pressure reached in devices which which offer no means of pressure determination while in use.
Why is it important?
We show in this paper how optical methods (Raman spectroscopy) can be used to determine the density increase of a silica glass sample after recovery from exposure to high pressures. Radial & axial Raman profiles can determine the achieved pressure distribution within the sample chamber.
The following have contributed to this page: MICHAEL GUERETTE and Dr. Michael Guerette