基于热沉淀法制备的空心结构ZnFe_(2)O_(4)吸波性能研究

Microwave absorption properties of ZnFe_(2)O_(4) hollow structure prepared by thermal precipitation method

以FeCl_(3)·6H_(2)O、ZnCl_(2)分别为锌源和铁源,采用热沉淀法制备具有空心结构且吸波性能良好的ZnFe_(2)O_(4),并通过SEM、TEM、XRD、XPS、BET、VSM、VNA等对其微观形貌、物相组成、比表面积及孔径分布、静磁性能、电磁性能等进行测试表征。结果表明,当涂层厚度为5.0 mm时,制备的空心结构ZnFe_(2)O_(4)在4.9 GHz有最小反射损耗-37.5 dB,小于-10 dB的有效频带宽度为3.9 GHz(3.5~6.9 GHz、17.1~17.6 GHz),其表现出的优异的吸波性能归因于独特的空心结构。研究的方法,可为具有优异吸波性能的轻质吸波材料的制备提供一种有效的思路。

In this paper,FeCl_(3)·6H_(2)O and ZnCl_(2) are respectively used as zinc and iron sources to prepare ZnFe_(2)O_(4) with hollow structure and good wave absorption performance by thermal precipitation method.By means of SEM,TEM,XRD,XPS,BET,VSM,VNA and other techniques,the microstructure,phase composition,specific surface area and pore size distribution,static magnetic properties,electromagnetic properties and other properties are tested and characterized.The results show that when the coating thickness is 5.0 mm,the prepared hollow ZnFe_(2)O_(4) structure has the minimum reflection loss of-37.5 dB at 4.9 GHz,and the effective band width of less than-10 dB is 3.9 GHz(3.5—6.9 GHz,17.1—17.6 GHz).Its excellent microwave absorption performance is attributed to its unique hollow structure.The method presented in this paper can provide an effective idea for light absorbing materials with excellent absorbing properties.