Method for synthesizing new-phase chalcocite-H copper sulfide ferromagnetic material at high temperature and high pressure

The invention relates to a method for synthesizing a new-phase chalcocite-H copper sulphide ferromagnetic material at high temperature and high pressure, which belongs to the technical field of ferromagnetic material preparation, and comprises the following steps: firstly, assembling a pressure maintaining device, so that a sample raw material (6), a sample cavity (5), a hard alloy mold (10), mold steel (4) and a heating resistance wire (3) are sequentially arranged in a cavity of the pressure maintaining device from a high-temperature end to a low-temperature end; the assembled pressure maintaining device is placed in a common two-side jacking press, the pressure is increased by 2-4 GPa, the temperature is increased to 300-500 DEG C, pressure maintaining and heat preservation are conducted for 60-100 minutes, then the temperature is decreased to 20-30 DEG C, the pressure is relieved to 0 GPa, the hard alloy punches (9) at the two ends are removed, the surface of a sample is cleaned, and the new-phase chalcoc