ZnFe_2O_4纳米材料的制备及其顺磁特性研究

Preparation and Characterization of Nanocrystalline ZnFe_2O_4 Particles and EPR Study on Their Properties

采用改进的共沉淀法制备了不同粒径的ＺｎＦｅ_２Ｏ_４，纳米晶体，利用ＸＲＤ和ＩＥＭ技术对其晶体结构和表面形貌进行了研究，结果表明：ＺｎＦｅ_２Ｏ_４纳米晶体可以在较低的温度下形成，它具有晶粒细小、晶粒大小均匀等优点，用ＥＰＲ技术对其顺磁共振特性进行了研究，探讨了顺磁共振特性变化规律。

Nanocrystalline ZnFe2O4 particles of several nanometers in size have been prepared by an improved coprecipitation method. Their particle structure, morphology and EPR properties were examined by XRD, TEM and EPR, respectively. It was found that ZnFe2O4 nanocrystalline could be produced at rather low temperature and was small. The EPR properties of the ZnFe2O4 nano powders were presented and discussed in terms of the observed temperature effect.