Abstract:Rhenium powder is an important doping raw material in the aerospace and nuclear industries. Its exceptional physical properties are prerequisite for its application. This study utilized high-purity ammonium rhenate from Guixi Smelter of Jiangxi Copper Industry Co., Ltd. as raw material, and devised a gradient of six two-step reduction temperatures. By employing equipment such as field emission scanning electron microscopy (FESEM), powder comprehensive characteristic analyzer, laser particle size analyzer, Fisher particle size analyzer, and oxygen-nitrogen-hydrogen analyzer, we comprehensively assessed the effects of reduction temperatures on the physical properties of rhenium powders. The research results indicate that when the two-step reduction temperature falls within range of 800 ℃ to 900 ℃, rhenium powder exhibits superior physical properties, achieving a compact density over 10 g/cm3.Besides, the oxygen content satisfies the specifications stipulated in the superior Re standard of YS/T 1017—2015.