(广州有色金属研究院 粉末冶金研究所，广州 510650)
摘 要: 在无水乙醇和惰性气体的保护下，利用高能球磨法制备重防腐涂料用超细钛粉，通过化学分析、粒度分析仪、扫描电镜等手段对超细钛粉的杂质含量、粒径和形貌进行表征，研究球磨转速、球料比等参数对钛粉粒度以及杂质含量的影响。结果表明：在球磨转速为378 r/min、球料比为2.43、球磨时间为8~18 h的球磨工艺下可制得中值粒径为9.91~2.28 µm的超细钛粉，其铁含量(质量分数)控制在0.23%~0.28%以内，粉末呈不规则鳞片状；球磨转速相对球料比而言是影响钛粉细化的显著性因素，而球料比则是影响钛粉铁含量增加的显著性因素。
关键字: 高能球磨；超细钛粉；分散剂
prepared by high energy ball milling
（Department of Powder Metallurgy, Guangzhou Research Institute of Nonferrous Metals, Guangzhou 510651, China）
Abstract:Ultrafine Ti powders applied for heavy-duty coatings were prepared by high energy ball milling with protection of ethanol and inert-gas. The impurity content, particle size and morphologies of ultrafine Ti powders were characterized by chemical analysis, particle size analyzer and scanning electron microscopy. The effects of such parameters as rotation speed and ball-to-powder ratio on the particle size and impurity content of Ti powders were investigated. The results show that when the rotation rate is 378 r/min, ball-to-powder ratio is 2.43 and milling time is 8−18 h, the ultrafine Ti powders with median diameter of 9.91−2.28 µm are obtained in which Fe content (mass fraction) is 0.23%−0.28%. The ultrafine Ti powders prepared by ball milling appear irregular flaky. Compared with ball-to-powder ratio, the rotation rate is the significant factor on the refinement of Ti powders, and the ball-to-powder ratio is the significant factor on increment of Fe content in Ti powders.
Key words: high energy ball milling; ultrafine titanium powders; dispersant
