Introduction

Solid environment high pressure and high temperature (SEHPHT) station is a systemforconducting research related to HPHT extreme conditions for large volume materials. The experimental station mainly consists of a new generation of cylindricalhigh-pressure cavity ultrahigh-pressure generator (under construction) andahigh-precision 2-6-8 octahedral compression cavity HPHT generator based onthetwo-sided top frame. While increasing the pressure of the existing large-cavity press, the volume of the sample cavity is increased. The cylindrical high-pressure cavityultrahigh-temperature and high pressure generator can realize extreme conditions of 20 GPa, 300-2500 K on centimeter-sized samples after the completion of the device;the octahedral compression cavity high-temperature and high pressure generatorincludes 3000 T Kawai, 1000 T Kawai, and 1000T DIA-type high-pressure generator, which can achieve extreme conditions of 28 GPa and 300-2500 Konmillimeter-scale samples,, which can expand the scope of research work relatedtoultrahigh-pressure high-temperature. The station is capable of carrying out researchon the preparation of large-size new functional materials, in-situ measurements ofthe transport properties of matter at high temperature and pressure, high-pressurechemical reaction processes of matter, simulation of the deep Earth's environment, and research on Earth's minerals and celestial meteorites.