Effect of deposition temperature on SrFe12O19@carbonyl iron core–shell composites as high-performance microwave absorbers  

作　　者：Yuan Liu Rong Li Ying Jia Zhen-Xin He 刘渊;李茸;贾瑛;何祯鑫(Xi’an Research Institute of High Technology,Xi’an 710025,China)

机构地区：[1]Xi’an Research Institute of High Technology,Xi’an 710025,China

出　　处：《Chinese Physics B》2020年第6期505-511,共7页中国物理B（英文版）

摘　　要：The SrFe12O19@carbonyl iron(CI) core–shell composites used in microwave absorption are prepared by the metal–organic chemical vapor deposition(MOCVD). The x-ray diffractometer, scanning electron microscope, energy dispersive spectrometer, and vector network analyzer are used to characterize the structural, electromagnetic, and absorption properties of the composites. The results show that the SrFe12O19@CI composites with a core–shell structure could be successfully prepared under the condition: deposition temperatures above 180℃, deposition time 30 min, and gas flow rate 30 m L/min.The electromagnetic properties of the composites change significantly, and their absorption capacities are improved. Of the obtained samples, those samples prepared at a deposition temperature of 180℃ exhibit the best absorption performance.The reflection loss of SrFe12O19@CI(180℃) with 1.5 mm–2.5 mm in thickness is less than-10 dB in a frequency range of 8 GHz–18 GHz, which covers the whole X band and Ku band.

关 键 词：SrFe12O19 carbonyl iron electromagnetic properties microwave absorption 

分 类 号：TB332[一般工业技术—材料科学与工程]