Study on Preparation of Barium-Zinc Ferrite Diatomaceous Earth and Its Wave Absorption Properties
With the development of internet technology,the problem of electromagnetic pollution becomes more and more serious.In this paper,the preparation of Ba0.5Zn0.5Fe2O4/diatomite and its wave-absorbing properties at different heat treatment temperatures were investigated to improve the electromagnetic pollution phenomenon.The Ba0.5Zn0.5Fe2O4/diatomite precursor was prepared by sol-gel method using citric acid as the complexing agent and heat-treated at 550℃,650℃and 750℃,respectively.The results of controlled tests at three groups of different heat treatment temperatures showed that spinel-type Ba0.5Zn0.5Fe2O4 was uniformly and densely coated on the surface of diatomaceous earth,in which the ferrite at the heat treatment temperature of 650℃had reflectance lower than-10 dB in the frequency range of more than 16 GHz,and the reflectance reached-22.13 dB at 13.05 GHz,showing good absorbing performance.
万方数据
维普
