摘要
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 fromFe(OH)3 gel. The effect of nucleating temperature, pH and Sn4+ ions on the morphologies ofhematite particles was studied. The experiments showed that uniform acicular particles can beobtained. First the suspension of Fe(OH)3 aged at 50-80℃ for 2h, crystal growing agent wasthen added, and put into a stainless steel autoclave with stirring at 150~170℃ for 1.5h. The keyproblem of the poor repeatability of experimental result was solved. The results were characterizedby TEM and XRD.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
1998年第6期813-817,共5页
Journal of Inorganic Materials
基金
河北省自然科学基金!296168
