Study on the Structure Transition of Graphite And Quartz Doped with Silicon under High Temperature and High Pressure

摘要

A new laboratory method has been suggested for synthesizing coesite in the Earth's crust by considering the similar characteristics of local collisions and shearing strength between the earth's plates and the high-energy mechanical ball milling (MBM), combining the high static pressure and high temperature technique，and using the mixtures of α-quartz and graphite as the initial materials, in which Silicon is mixed by the best quality ratio. The lowest pressure and temperature condition for synthesizing coesite is 3.8GPa and 873K.