Volatilization and condensation behaviours of Mg under vacuum. (October 2018)

• Record Type: Journal Article
• Authors: Xiong, Neng; Tian, Yang; Yang, Bin; Xu, Bao-Qiang; Liu, Da-Chun; Dai, Yong-Nian
• Is Part Of: Vacuum. Volume 156(2018)
• Page Start: 463
• Page End: 468
• Publication Date: 2018-10
• Subjects: Vacuum -- Volatilization -- Magnesium -- Desublimation -- Condensation; Vacuum -- Periodicals; 621.55
• DOI: 10.1016/j.vacuum.2018.08.014
• Languages: English
• ISSNs: 0042-207X

Abstract

Abstract: The volatilization and condensation behaviours of magnesium during the sublimation and desublimation processes were investigated at 10 Pa, respectively. The average volatilization rate increases with increasing temperature, but decreases with increasing specific surface area. The condensation position at which the magnesium vapor becomes solid is further away from the heating source with the temperature of the heating source increasing, but the value of the condensation temperature is maintained in an interval (603–733 K). It can be beneficial to the condensation and crystallization of magnesium vapor with increasing the temperature and temperature gradient of the condensing zone appropriately. Highlights: A novel experimental method to study metal vapor condensation, the interaction of magnesium vapor with non-condensable gas, which also applies to other metal vapors. The effects of pressure, condensation temperature and temperature gradient on the condensation of magnesium vapor were investigated. The volatilization and condensation behavior of magnesium vapor is of great significance to the reverse reaction problem in the process of preparing magnesium metal by vacuum carbothermal reduction.