| 低发射率SiO2/Al2 O3纳米复合粉体的制备和红外隐身性能 |
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| 作者姓名： | 陈珂 纪箴苣 张一帆 贾成厂 杨善武 |
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| 作者单位： | 北京科技大学材料科学与工程学院,北京,100083;北京科技大学材料科学与工程学院,北京,100083;北京科技大学材料科学与工程学院,北京,100083;北京科技大学材料科学与工程学院,北京,100083;北京科技大学材料科学与工程学院,北京,100083 |
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| 基金项目： | 国家重点基础研究发展规划资助项目(2014GB120000)国家自然科学基金资助项目(51471023) |
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| 摘 要： | 采用溶胶-凝胶法制备非晶态和结晶态两种相结构的SiO2/Al2O3纳米复合粉体,通过X射线衍射、透射电子显微镜等手段对纳米复合粉体结构和形貌进行表征,并利用傅里叶变换红外光谱仪研究纳米复合粉体的红外隐身性能.结果表明:两种相结构的SiO2/Al2O3纳米复合粉体均呈不规则颗粒状,其中结晶态SiO2/Al2O3纳米复合粉体的平均晶粒尺寸约为18 nm；结晶态SiO2/Al2O3纳米复合粉体在2.5~25μm波长范围内的红外发射率均低于非晶态复合粉体,3~5μm内发射率平均值为45.65%,8~14μm内发射率平均值为46.19%,是一种低发射率的红外隐身复合纳米材料.
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| 关 键 词： | 二氧化硅 氧化铝 纳米复合材料 粉体 隐身技术 发射率 |
| 收稿时间： | 2015-10-30 |
Preparation and infrared stealth properties of SiO2/Al2O3 nanocomposite powders with low emissivity |
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| Affiliation: | School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China |
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| Abstract: | Crystalline and amorphous SiO2/Al2O3 nanocomposite powders were prepared by a sol-gel method. The structure and morphology of the nanocomposite powders were characterized by X-ray diffraction and transmission electron microscopy, while the in-frared stealth property was detected by Fourier transform infrared spectroscopy spectrometry. The results show that both the nanocom-posite powders have irregular shapes, in which the average grain size of the crystalline one is about 18 nm. The crystalline nanocom-posite powder is a kind of composite nanomaterial with low infrared emissivity, and its average emissivity is 45.65% in 3-5μm and 46.19% in 8-14μm, which are lower than those of the amorphous one in 2.5-25μm. |
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