一种液相制备均匀α-Fe_2O_3微粉的新方法

A New Method of Prepared Uniform α-Fe_2O_3 Ultrafine Powder in Solution

利用沸腾回流强迫水解法由FeCl3或Fe(NO3) 3溶液( 0 .5 -1.0mol·L-1)在弱酸性环境下 ,制备了均匀亚微米级α -Fe2 O3胶粒。如果在反应液中加入微量Na2 SO3,完全转化为α-Fe2 O3粒子的时间可缩短至几小时。

In this paper,the uniform submicrometer α-Fe 2O 3 particles are prepared by the forced hydrolysis method of boiling reflux from FeCl 3 or Fe(NO 3) 3 solution,pH=4.0～4.5 for 20h.When slight amount Na 2SO 3 had been added to reaction solution,the time of completely being turned into α-Fe 2O 3 particles from Fe 3+ salts decreased to a few hours.All samples were characterized by using XRD and TEM.