Morphology Regulation Path and Development Trend in Preparation Techniques of High-Purity Molybdenum Powder

Abstract:

High-purity molybdenum powder, owing to its excellent high-temperature mechanical properties, electrical and thermal conductivity, and corrosion resistance, has been widely applied in aerospace, electronic devices, nuclear energy, and powder metallurgy. This paper systematically reviewed the preparation methods of high-purity molybdenum powder, including hydrogen reduction, carbothermal reduction, spray pyrolysis, and low-temperature molten salt-assisted reduction. The effects of different preparation techniques on the purity, particle size distribution, morphological evolution, and sintering performance of molybdenum powder were analyzed. Among existing methods, hydrogen reduction is extensively applied, and research suggests that tuning reduction conditions can significantly influence impurity removal and morphological consistency. Additionally, emerging techniques, such as spray pyrolysis and low-temperature molten salt-assisted reduction, exhibit promising potential in particle size control, spheroidization, and nanostructuring, thereby enhancing powder flowability and sintering densification. Future research should further optimize precursor selection and process parameters to enhance the purity, particle size uniformity, and morphological control of molybdenum powder, meeting the growing demand for high-performance molybdenum materials in advanced manufacturing.