Construction of the Large-Volume Material Research System under High Temperature and High Pressure at Synergetic Extreme Condition User Facility (SECUF): High-Temperature and High-Pressure Large-Volume Materials

Large-volume presses (LVPs) play a crucial role in high-pressure science, particularly in fields such as earth sciences, condensed matter physics, materials science, chemistry, and biology, due to their ability to provide large sample volumes, fluid pressure-transmitting environments, deformability, rapid compression, and in-situ measurement capabilities. Jilin University has successfully established the High-Pressure and High-Temperature (HPHT) Large-Volume Material Research Platform as part of the Synergetic Extreme Condition User Facility (SECUF). This platform integrates various types of LVP subsystems, including solid environment, liquid environment, and non-equilibrium environment high-pressure and high-temperature extreme condition experimental subsystems. This paper elaborates on the construction process of each subsystem and reviews the functions and characteristics of the high-pressure and high-temperature extreme condition subsystems under different environments. Using the solid environment HPHT extreme condition experimental subsystem, a belts-type device has been constructed, enabling the preparation of large-volume samples under a pressure of 20 GPa, with a cavity volume of up to 1000 mm³. Using the piston-cylinder type liquid environment large-volume press from the liquid environment HPHT extreme condition subsystem, equipped with diamond optical windows, high-pressure loading of up to 1.8 GPa and 1000 K, as well as in-situ spectroscopic testing, can be achieved within a sample chamber of up to 10 μL. Using the non-equilibrium environment high-pressure extreme condition subsystem, a controllable rapid-loading large-volume press has been developed, capable of achieving rapid pressure loading of 10.2 GPa within 20 milliseconds. The paper briefly reviews typical experimental results obtained using different LVPs to illustrate the application scenarios and advantages of these presses. In summary, the platform described in this paper is expected to make significant contributions to high-pressure scientific research and the innovation of high-pressure technologies.