High-purity graphite powder material is the most fundamental raw material for synthesizing artificial diamonds. Under the high-temperature and high-pressure conditions provided by press equipment, it can be transformed into artificial diamonds, directly affecting the color, transparency, and various performance indicators of the synthesized diamonds. The high-purity graphitization technology involves gradually heating purchased ordinary flake graphite in a high-temperature tubular carbon tube furnace, maintaining a temperature above 2500°C in the high-temperature zone for constant-temperature purification of the graphite. During this process, inert gas is slowly introduced to remove various impurities or harmful elements volatilized at high temperatures.

After treatment in a high-temperature carbon tube furnace, the flake graphite has its impurity content strictly controlled to below 30 ppm. When used in the production of synthetic diamonds, its internal purity and crystal form integrity are significantly improved. To ensure the quality stability of the high-purity graphite produced, the company has optimized and upgraded the production process. This includes cooling before sieving, followed by large-scale batch mixing using negative-pressure automatic feeding equipment, and adding stainless steel media to enhance the mixing effect. With the optimized and upgraded production process, the diamonds synthesized from the high-purity graphite exhibit stable performance across all indicators. The static compressive strength (Static test) of the material is ≥42 kg, and the impact resistance test results show a thermal impact resistance (TTI) of ≥76% and a cold impact resistance (TI) of ≥83%.