应用低温水热方法合成了不同形态的三氧化二铁晶体,并对所得的产品进行了一系列的表征。扫描电镜照片显示,随着反应条件的改变,三氧化二铁的形态由树枝状晶体转化为六对称雪花状晶体、成对微米片。在扫描电镜照片帮助下,对一系列不同形态三氧化二铁的生长过程进行了合理的分析,并对实验的影响因素进行了研究。最后给出三氧化二铁的磁学性质。 Different forms of ferric oxide crystals were synthesized by low temperature hydrothermal method. The obtained products were characterized by a series of methods. Scanning electron micrographs showed that with the change of reaction conditions, the morphology of ferric oxide was transformed into dendritic crystals into hexagonal symmetrical snowflake-like crystals and paired microplates. With the help of SEM photographs, a series of different forms of ferric oxide growth process were analyzed rationally, and the influencing factors of the experiment were studied. Finally, the magnetic properties of ferric oxide are given.