基板对自反应喷射成形技术制备锰-锌铁氧体片状吸波剂的影响

研究了自反应喷射成形技术制备片状吸波剂的可行性以及基板材质对制备片状吸波剂微观结构及电磁性能的影响。以Fe+MnO₂+Fe₂O₃+ZnO为反应体系,选取了石墨、黄铜和钨铜3种材质基板,基于自反应喷射成形技术原理制备锰-锌铁氧体片状吸波剂,进行自反应喷射成形实验,采用XRD、SEM分析获得的片状吸波剂的形貌、物相和微观结构,选用矢量网络分析仪测试片状吸波剂的电磁性能。结果表明:只有当黄铜作为基板时才能够得到较明显的锰-锌铁氧体片状吸波剂,并且黄铜作为基板的片状吸波剂的电磁波吸收强度和吸收带宽均强于其余2种,说明基板的选择对自反应喷射成形法制备片状吸波剂无论是在微观结构方面还是在吸波性能方面都会产生较大影响。 

Effect of substrate on Mn-Zn ferrite flake absorbent prepared by self-reactive spray forming technology

The feasibility of preparing flake absorbent by self-reactive spray forming technology and the effect of substrate on microstructure and electromagnetic properties of flake absorbent were studied.Fe+MnO2+Fe2 O3+ZnO was treated as the reactive system.Substrates made of graphite,tungsten copper and brass materials were cho-sen to prepare the flake Mn-Zn ferrite absorbent based on mechanism of self-reactive spray forming technology.XRD and SEM were used to characterize the morphology phase and microstructure of the absorbent.The electromagnetic properties of the flake absorbent were tested by the web vector analyzers.The results show that,flake Mn-Zn fer-rite absorbent can only be obviously acquired by brass substrate,and the absorption intensity and bandwidth of the absorbent prepared on brass is better than the other two kinds.It means that the choice of substrate has a great effect on both microstructure aspect and electromagnetic properties aspect of flake absorbent prepared by self-reac-tive spray forming technology.