本文以Fe（OH）3凝胶为初始物，研究了成核温度、pH值以及Sn4+离子对水热合成针形α－Fe2O3粒子形貌的影响．实验证明，一定浓度的Fe（OH）3凝胶先在50～80℃成核，而后加入晶体成长剂，并调节pH值后入釜在150～170℃，短时间可转化为均匀针形α－Fe2O3粒子．解决了实验结果重现性差这一关键问题．使用TEM及XRD对结果进行了表征．
Uniform acicular hematite particles were prepared by two steps hydrothermal method from Fe(OH)3 gel. The effect of nucleating temperature,
pH and Sn4+ ions on the morphologies of hematite particles was studied. The experiments showed that uniform acicular particles can be obtained. First
the suspension of Fe(OH)3 aged at 50～80℃ for 2h, crystal growing agent was then added, and put into a stainless steel autoclave with
stirring at 150～170℃ for 1.5h. The key problem of the poor repeatability of experimental result was solved. The results were characterized
by TEM and XRD.
参考文献
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