以海绵钛为原料,采用经过氢化破碎、阻止剂包覆、真空脱氢以及阻止剂脱除的方法制备超细钛粉.采用TEM、SEM以及激光粒度测试等手段研究制备过程中工艺参数对钛粉形貌、粒度及氧含量的影响,探讨阻止剂的晶粒长大抑制机理.结果表明:海绵钛在700℃、2h渗氢后经过球磨5h,粉末中位径(D50)达到2.61 μm,以NaCl为阻止剂对氢化粉末进行包覆,经630℃、2h脱氢并脱除阻止剂后,制得的超细钛粉呈不规则形状,中位径达6.16 μm,氧含量为0.89％(质量分数)；阻止剂的引入造成钛粉氧含量的微量增加;通过阻止剂包覆,在粉末颗粒表面形成厚度为5～10 nm的隔离层,阻碍了加热过程中Ti颗粒表面的原子扩散,从而阻止加热脱氢过程中粉末颗粒的长大.
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