Introduction

The liquid environment high pressure and high temperature (LEHPHT) station is composed of high-temperature and high-pressure generating device and in-situ spectroscopy testing system. The high-temperature and high-pressure generation device is composed of two liquid environment large chamber pressure mechanisms, including hundred milliliter volume liquid environment "ultra high temperature and static high pressure apparatus " and microliter volume liquid environment "piston cylinder liquid high pressure apparatus". The hundred milliliter volume liquid environment "ultra high temperature and static high pressure apparatus " has a 100ml large volume sample chamber, which can provide a temperature and pressure environment of 500 MPa and 800 K for the liquid phase reaction environment in the sample chamber; The microliter volume liquid environment "piston cylinder liquid high pressure apparatus" has a large volume sample chamber with ten microliters, which can provide a temperature and pressure environment of 1.8 GPa and 1000K in the liquid phase environment.Meanwhile, the large chamber press is equipped with in-situ spectroscopy test system, including fluorescence microscope, Raman spectrometer, transient fluorescence spectrometer, Fourier transform infrared spectrometer and other instruments and equipment, which can realize in-situ spectroscopy measurement under high temperature and high pressure conditions during the operation of the large chamber press, and carry out deeper characterization of the physical property changes of substances under extreme conditions of high temperature and high pressure.