Synthesis of TiCl2 powders through reactive gas phase infiltration in a fluidized bed reactor

• 作者: Miao Song Yafeng Yang Hongdan Zhao Maoqiao Xiang Qingshan Zhu Jibin Jia Chaoquan Hu Fen Yue
• 来源期刊: 颗粒学报（英文版）
• 年，卷（期）: 2021,（4）
• 所属期刊栏目: Regular Articles
• 页码范围: 95-103
• 页数: 9页
• 语种: 英文

摘要

TiCl2 is a promising precursor for producing metallic titanium alloys and titanium-based ceramics.How-ever,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℃and 120 min)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℃),which impeded infiltration by gaseous TiCl4.The particle size of the Ti reducing agent played a vital role in the production ofTiCl2 powder.A mean particle size of 24.5 μm was confirmed to be the most feasible option based on the optimal chlorinated depth(17 μm).