Park Sung-Hun, Oh Junoh, Song Youngju, Jeoung Hyeong-Jun, Kang Jungshin
Research Institute of Energy and Resources, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea.
School of Materials Science and Engineering, Pusan National University, 2, Busandaehak-ro 63 beon-gil, Geumjeong-gu, Busan, 46241, Republic of Korea.
Sci Rep. 2025 Jan 13;15(1):1818. doi: 10.1038/s41598-024-84433-w.
To develop a direct production process for TiH powder from TiO, the reduction of TiO using Mg in molten MgCl - KCl salt under a high hydrogen chemical potential was investigated. The reduction of nano-sized TiO powder was conducted at 973 - 1073 K under an Ar or Ar and 10% H mixed gas atmosphere when the mass ratios of Mg to feed and salt to feed were 1.14 - 2.86 and 0.87 - 3.48, respectively. The results showed that the oxygen concentration in the Ti product decreased as the mass ratio of salt to feed and temperature decreased. Furthermore, according to the variation in Mg amounts, the oxygen concentration was 0.350 - 0.441 mass%. In addition, employing hydrogen during the reduction enhances the capability to decrease the oxygen concentration in the Ti product. Moreover, the hydrogen concentration in the Ti product increased as the amount of molten salt decreased, thereby enabling pure TiH production. As a result, TiH powder with an oxygen concentration of 0.350 mass% was obtained under a certain condition. These results demonstrate the feasibility of the direct production of low-oxygen TiH powder from TiO via reduction at 973 K using Mg in an Ar and H mixed gas atmosphere.
为了开发一种从TiO直接生产TiH粉末的工艺，研究了在高氢化学势下，在熔融的MgCl-KCl盐中用Mg还原TiO的过程。当Mg与原料的质量比以及盐与原料的质量比分别为1.14-2.86和0.87-3.48时，在973-1073K的Ar或Ar与10%H混合气体气氛下对纳米级TiO粉末进行还原。结果表明，Ti产物中的氧浓度随着盐与原料的质量比和温度的降低而降低。此外，根据Mg量的变化，氧浓度为0.350-0.441质量%。另外，在还原过程中使用氢气可增强降低Ti产物中氧浓度的能力。而且，Ti产物中的氢浓度随着熔盐量的减少而增加，从而能够生产纯TiH。结果，在一定条件下获得了氧浓度为0.350质量%的TiH粉末。这些结果证明了在Ar和H混合气体气氛下，于973K用Mg还原TiO直接生产低氧TiH粉末的可行性。
