Ni-Zn铁氧体粉末的溶胶-凝胶合成及微波性能

The Study of the Preparation and Microwave Properties of Ni-Zn Ferrite by Sol-gel Process

以硝酸铁、硝酸镍、硝酸锌、柠檬酸和氨水为原料,用溶胶-凝胶法合成了不同组成的Ni-Zn铁氧体粉末。利用热分析、X射线衍射等手段研究了干凝胶热分解行为。利用网络分析仪对铁氧体粉末的电磁性能进行了表征,考察了铁氧体的组成与其电磁性能之间的关系。结果表明,溶胶-凝胶法合成的铁氧体粉末的μ″值随测试频率的提高和Ni-Zn铁氧体中锌含量的增加而减小。

Ni-Zn fenite powder with different composition were prepared by Sol-gel process using Fe（NO3）3·9H2O, Ni（NO3）2·6H2O, Zn（NO3）2·6H2O, citrate acid and ammonia as raw materials. The thermal decomposition behavior of dried gel and crystallite size of synthesized powders were studied by using TG-DTA and XRD. Moreover, the relafionslfip of ferrite composition on electromagnetic properties were investigated by network analyzer. The results reveal that the imaginary part of permeability of synthesized powders decreases with frequency and the content of Zn in the Ni-Zn ferrite powder.