Abstract: Single-phase Zn0.96Co0.04O nanofibers were successfully fabricated via sol-gel method in combination with electrospinning technique using zinc acetate, cobalt nitrate and polyvinylpyrrolidone as principal raw materials. The thermal decomposition process of as-spun precursor nanofibers and the influences of calcination temperature on the crystal structure, micromorphology and microwave-absorbing properties of the prepared nanofiber samples were investigated by means of thermogravimetric and differential thermal analysis, X-ray diffraction, field emission scanning electron microscopy and vector network analyzer. The result shows that single hexagonal wurtzite Zn0.96Co0.04O are obtained after calcining at above 600 ℃. With the increase of calcination temperature, the morphology of Zn0.96Co0.04O fiber changed from three-dimensional network to bamboo-like structure, and eventually lost the fiber morphology and presents the irregular.At the same time, the maximum absorption peak of nanofibers moves toward a high frequency. The Zn0.96Co0.04O exhibits best electromagnetic properties at the calcination temperature 600 ℃, and the as-prepared samples possess excellent microwave absorption performance. The qualified absorption bandwidth reaches 2.5 GHz (7.5—10 GHz), and the minimum reflectivity reaches -18.18 dB.
汪心坤, 赵芳, 王建江. 煅烧温度对Zn0.96Co0.04O纳米纤维吸波性能的影响[J]. 材料导报, 2020, 34(14): 14034-14038.
WANG Xinkun, ZHAO Fang, WANG Jianjiang. Effect of Calcination Temperature on Microwave Absorbing Properties of Zn0.96Co0.04O Nanofibers. Materials Reports, 2020, 34(14): 14034-14038.
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2020, Vol. 34 
