Abstract
TiCl2 is a promising precursor for producing metallic titanium alloys and titanium-based ceramics. However, the effective synthesis of high-quality TiCl2 powder remains challenging. Herein, a fluidized bed reactor (FBR) providing a high gas–solid contact area was employed to synthesize TiCl2 powder using a reliable TiCl4–Ti reaction system. Optimal reaction conditions (600°C and 120min) were determined for the proposed Ti–TiCl4 system by kinetic investigation. A dense Ti layer was regenerated upon the original surface of the Ti powder as a result of TiCl2 disproportionation at high temperature (above 700°C), which impeded infiltration by gaseous TiCl4. The particle size of the Ti reducing agent played a vital role in the production of TiCl2 powder. A mean particle size of 24.5μm was confirmed to be the most feasible option based on the optimal chlorinated depth (17μm).
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