采用溶剂热方法分别在聚乙二醇、三乙二醇溶液中热分解乙酰丙酮铁,得到分散性能良好、尺寸均匀、形貌一致的Fe3O4纳米颗粒,颗粒尺寸为7～8nm.通过X射线衍射及透射电镜研究发现,两种溶液中制备样品均为面心立方结构,且在三乙二醇溶液中制备颗粒分散性更好.分别对两种样品进行磁测量,发现室温时均表现出超顺磁性,398kA/m时的磁化强度分别为50、40A.m2/kg.微波吸收测试显示,颗粒的分散性有利于改善样品的反射损耗.
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