A Novel Process for Preparing Titanium Powder by Calcium Vapor
A novel calciothermic reduction method of titanium dioxide (TiO2) was presented in this paper. In this, process, calcium chloride (CaCl2) and pigment grade titanium dioxide were mixed and pressed into pieces. The pieces reacted with calcium vapor in a sealed graphite crucible in vacuum furnace. Then titanium powder was obtained from the reduced preform by leaching it with deionized water and acid,and drying it in vacuum oven. The effects of the amount of CaCl2 on microstructure and composition of the reduction products were investigated by means of scanning electronic miscroscopy (SEM),energy dispersion spectrum (EDS) and X-ray diffraction (XRD). The results indicate that addition of CaCl2 can enlarge the reaction surface between calcium vapor and solid TiO2 and improve the gas-solid phase reaction. The titanium powder (purity detemined by EDS:99. 55 mass％;morphology:irregular;particle size:8-15μm) was obtained on the condition of temperature 1000°C for 6h.
Titanium powder titanium dioxide calciothermic reduction calcium chloride
Heli Wan Baoqiang Xu Bin Yang Wei Sen Yongnian Dai
National Engineering Laboratory for Vacuum Metallurgy,Kunming 650093,China Key Laboratory for Non fe National Engineering Laboratory for Vacuum Metallurgy,Kunming 650093,China Key Laboratory for Non fe
国际会议
The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)
北京
英文
101-105
2011-06-19（万方平台首次上网日期，不代表论文的发表时间）