Presentation Information
[2501-10-05]Formation of Titanium Sulfide from Titanium Oxycarbonitride by CS2 Gas
○Yuta Yashima1, Eltefat Ahmadi2,1, Shungo Natsui1, Tatsuya Kikuchi1, Ryosuke O. Suzuki1, Sheikh A. Rezan2 (1. Hokkaido University, 2. Universiti Sains Malaysia)
司会：永井 崇（千葉工業大学）
Keywords:
Titanium Sulfide,Titanium Nitride,Sulfurization,Oxycarbonitride,Carbon Sulfide
Sulfurization procedure was examined to synthesize titanium sulfide from titanium oxycarbonitride by CS2 gas. The experiments were carried out at 1173 - 1523 K in a tube reactor with continuously flowing Ar as carrier gas of CS2. The formation of titanium sulfide phases from the commercial TiN, TiC and TiO powders were studied. Then, TiO0.02C0.13N0.85 coming from ilmenite was sulfurized to prepare single-phase of titanium sulfide. The process was remarkably dependent on the temperature and time. TiN and TiO0.02C0.13N0.85 powders could be fully converted to the single phase of Ti2.45S4 (Ti2+xS4) at 1473 K in 3.6 ks. The maximum weight gain of TiN sample was ~55.3% indicating a full conversion of TiN to Ti2S3 phase. The carbon and oxygen contents in the sulfide prepared from TiO0.02C0.13N0.85 were about 1.77 wt.%C and 1.40 wt.%O, respectively. Therefore, it could be a promising feedstock for the production of cost-affortable titanium powder.