| 核-壳结构Al_(2)O_(3)@CIPs的制备及其抗氧化性能和吸波性能EI北大核心CSCD |
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| 引用本文： | 于明飞,姚伦标,卿玉长,马莉娅. 核-壳结构Al_(2)O_(3)@CIPs的制备及其抗氧化性能和吸波性能EI北大核心CSCD[J]. 材料工程, 2022, 50(10): 111-117. DOI: 10.11868/j.issn.1001-4381.2021.000330 |
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| 作者姓名： | 于明飞 姚伦标 卿玉长 马莉娅 |
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| 作者单位： | 1.中国航发贵阳发动机设计研究所, 贵阳 5500812 西北工业大学 凝固技术国家重点实验室, 西安 710072 |
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| 基金项目： | 西北工业大学凝固技术国家重点实验室基金(2020-TS-01) |
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| 摘 要： | 采用球磨-原位氧化法制备出具有核-壳结构的Al_(2)O_(3)@CIPs复合材料。通过X射线衍射仪、热重分析仪、扫描电镜对Al_(2)O_(3)@CIPs的物相组成、质量变化和微观形貌进行分析,研究不同氧化温度对Al_(2)O_(3)@CIPs复合材料电磁性能和吸波性能的影响。结果表明:随着氧化温度的升高,Al_(2)O_(3)@CIPs的壳层出现不同程度的损坏,并伴有Fe氧化物的生成。其中,介电常数先增大后减小,而磁导率则降低。对比CIPs,经过400℃原位氧化获得的Al_(2)O_(3)@CIPs具有良好的吸波性能,对应的介电常数实部约为15,虚部为2.8~4.3。在X波段1.8 mm厚度下可获得3.4 GHz的有效吸收带宽(<-10 dB),而在450℃原位氧化得到的Al_(2)O_(3)@CIPs在11.1 GHz处获得最大的反射损耗,为-30 dB。
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| 关 键 词： | 核-壳结构Al_(2)O_(3)@CIPs 抗氧化性 介电常数 磁导率 微波吸收 |
| 收稿时间： | 2021-04-10 |
Preparation of core-shell Al2O3@CIPs and its anti-oxidation properties and microwave absorbing performance |
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| Mingfei YU,Lunbiao YAO,Yuchang QING,Liya MA. Preparation of core-shell Al2O3@CIPs and its anti-oxidation properties and microwave absorbing performance[J]. Journal of Materials Engineering, 2022, 50(10): 111-117. DOI: 10.11868/j.issn.1001-4381.2021.000330 |
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| Authors: | Mingfei YU Lunbiao YAO Yuchang QING Liya MA |
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| Affiliation: | 1.AECC Guiyang Engine Research Institute, Guiyang 550081, China2 State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China |
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| Abstract: | Core-shell Al2O3@carbonyl iron powders (CIPs) were prepared by ball-milling-in-situ oxidation method. The phase composition, mass change and micromorphology of Al2O3@CIPs were analyzed by X-ray diffraction, thermogravimetric analyzer and scanning electron microscopy. The effects of various oxidation temperature on electromagnetic properties and absorbing performance of Al2O3@CIPs were studied. The results show that, as the oxidation temperature increases, the shell of Al2O3@CIPs is damaged to some extent and accompanied by the formation of iron oxides, its permittivity rises first and then declines, while permeability shows a downward trend. Compared with CIPs, Al2O3@CIPs obtained by in-situ oxidation at 400℃ achieve excellent electromagnetic wave absorption performance.The real part of the permittivity is about 15, and the imaginary part is 2.8-4.3. The effective absorption band (< -10 dB) of 3.4 GHz can be obtained under the thickness of 1.8 mm in the X-band, while the Al2O3@CIPs obtained by in-situ oxidation at 450℃ achieve the maximum reflection loss of -30 dB at 11.1 GHz. |
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| Keywords: | core-shell Al2O3@CIPs anti-oxidation property permittivity permeability microwave ab-sorption |
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