In-Flight Formation of Nano-Crystalline Titanium Dioxide Powder in a Plasma Jet and Its Characterization

作     者：P. V. ANANTHAPADMANABHAN M. VIJAY T. K. THIYAGARAJAN K. P. SREEKUMAR V. SELVARAJAN Jiaguo YU Shengwei LIU 

作者机构：Laser & Plasma Technology Division Bhabha Atomic Research Centre Mumbai-400085 India Department of Physics Bharathiar University Coimbatore 641046 India State Key Laboratory of Advanced Technology for Material Synthesis and Processing Wuhan University of Technology Wuhan 430070 China 

出 版 物：《Plasma Science and Technology》 (等离子体科学和技术（英文版）)

年 卷 期：2010年第12卷第4期

页      面：426-432页

核心收录：

学科分类：080704[工学-流体机械及工程] 07[理学] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 070204[理学-等离子体物理] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Beam Technology Development Group, Bhabha Atomic Research Centre (BARC) Laser & Plasma Technology Division, BARC 

主　　题：nanostructures titanium dioxide arc plasma synthesis reactive plasma pro- cessing surface properties 

摘      要：Nanocrystalline titanium dioxide powder was synthesized by in-flight oxidation of titanium dihydride （TiH2） powder in a thermal plasma jet. TiH2 powder was injected into the thermal plasma jet and allowed to react with oxygen injected downstream the jet. Characteriza- tion of the powder by various analytical tools indicated that the powder consisted of nano-sized titanium dioxide particles consisting predominantly of the anatase phase. It is suggested that the thermo-chemistry of the oxidation process contributes significantly to the formation of nano-sized titania. The large energy released during the oxidation process dissociates the TiO2 particles into TiO（g） and titanium vapour, which recombine downstream with oxygen and form nano particles of TiO2.