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Synthesis of Titanium Hydride Powder Via Magnesiothermic Reduction of TiCl4 in H2 gas Atmosphere

이소영|이호성|손호상|강정신|박성훈
한국자원리싸이클링학회|2023.04|자원리싸이클링 (Resources Recycling)|제32권 제2호|pp. 19-32|DOI https://doi.org/10.7844/kirr.2023.32.2.19

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hydrogen수소titanium hydridetitanium powdertitanium tetrachloridemagnesiothermic reduction수소화타이타늄타이타늄 분말사염화타이타늄마그네슘 열환원
주제분류자원공학

초록

A novel method for the synthesis of titanium hydride powder from titanium tetrachloride via the magnesiothermic reduction in an hydrogen gas atmosphere was investigated. To examine the influence of temperature on the formation of titanium hydride, the reduction was conducted at 1023~1123 K under 1 atm of hydrogen gas atmosphere for approximately 30 min. Subsequently, the titanium hydride powder was sintered by maintaining the temperature for 0~120 min, and the decrease in the oxygen concentration of the powder was investigated. The experimental results showed that TiH1.924 was produced at 1023 K, whereas mixtures of TiH1.924 and TiH1.5 were produced at 1073 K and 1123 K. In addition, the hydrogen concentration in the powder decreased with increasing temperature. The concentration of oxygen in the powder decreased with increasing temperature and sintering time owing to the decrease in the specific surface area of the powder. The minimum concentration of oxygen was 0.246 mass% when the mixture of TiH1.924 and TiH1.5 was obtained at 1073 K and a sintering time of 120 min.

Abstract

A novel method for the synthesis of titanium hydride powder from titanium tetrachloride via the magnesiothermic reduction in an hydrogen gas atmosphere was investigated. To examine the influence of temperature on the formation of titanium hydride, the reduction was conducted at 1023~1123 K under 1 atm of hydrogen gas atmosphere for approximately 30 min. Subsequently, the titanium hydride powder was sintered by maintaining the temperature for 0~120 min, and the decrease in the oxygen concentration of the powder was investigated. The experimental results showed that TiH1.924 was produced at 1023 K, whereas mixtures of TiH1.924 and TiH1.5 were produced at 1073 K and 1123 K. In addition, the hydrogen concentration in the powder decreased with increasing temperature. The concentration of oxygen in the powder decreased with increasing temperature and sintering time owing to the decrease in the specific surface area of the powder. The minimum concentration of oxygen was 0.246 mass% when the mixture of TiH1.924 and TiH1.5 was obtained at 1073 K and a sintering time of 120 min.

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