ZnFe2O4纳米晶的性能

用ＰＥＧ凝胶法合成出不同平均粒径的ＺｎＦｅ２Ｏ４纳米晶。用ＴＥＭ和ＸＲＤ分析其结构、粒径和形貌。用磁天平仪和红外光谱仪（ＩＲ）等手段研究其性能。结果表明ＺｎＦｅ２Ｏ４纳米晶在室温下有磁性，表面不饱和离子配位数降低。

STUDIES OF PERFORMANCES ON NANOCRYSTALLINE ZnFe_2O_4

anocrystalline ZnFe2O4 have been prepared by the PEG gel method and their structure and magnetic properties were examined by the X-ray diffraction, transmission electron microscopy. It was shown that prepared samples have a single-sprinel structure and are spheric which particel sizes are 10.0, 12.2, 27.5 and 44.0 nm. The experimental results have shown the particle size increases with the calcining temperature and time. Densities of samples reduces with particle size decreasing at 1.0 GPa. Magnetic properties were measured by magnetic balance. It was found that ZnFe2O4 nanocrystal is magnetic at room temperature. It's magnetisability decreases and magnetization increases with magnetic intensity increasing. The IR spectra of the samples broadened and splited variously.