| 引用本文: | 邵春明,罗艳,徐国跃,申星梅,余慧娟,胡晨.核-壳结构粒子SiO2@Bi2O3的制备及红外发射率研究[J].材料科学与工艺,2010,18(1):43-45.DOI:10.11951/j.issn.1005-0299.20100110. |
| SHAO Chun-ming,LUO Yan,XU Guo-yue,SHEN Xing-mei,YU Hui-juan,HU Chen.Preparation and infrared emissivity properties of core-shell structured SiO2@Bi2O3 spheres[J].Materials Science and Technology,2010,18(1):43-45.DOI:10.11951/j.issn.1005-0299.20100110. |
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| 摘要: |
| 为了研究制备复合隐身粒子的方法,采用溶胶-凝胶法制备了核-壳结构SiO2@Bi2O3粒子.通过XRD、TEM及发射率测试仪对制备的材料的结构、形貌和性能进行了表征.XRD表明在700℃可以得到Bi2O3纯相;红外发射率测试表明,Bi2O3具有较低的红外发射率,在SiO2表面包覆Bi2O3后,在3～5μm和8～14μm两个测试波段都能降低SiO2的红外发射率.通过核-壳结构的形式,在较高发射率的样品表面涂覆红外发射率较低的样品,可以提高红外隐身效果. |
| 关键词: 核-壳结构 红外发射率 氧化铋 |
| DOI：10.11951/j.issn.1005-0299.20100110 |
| 分类号:TB34 |
| 基金项目:国家自然科学基金重大研究计划资助项目(90505008);国家自然科学基金资助项目(60471005);中国博士后科学基金资助项目(第39批);江苏省博士后科研资助计划(2006年度第一批) |
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| Preparation and infrared emissivity properties of core-shell structured SiO2@Bi2O3 spheres |
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SHAO Chun-ming, LUO Yan, XU Guo-yue, SHEN Xing-mei, YU Hui-juan, HU Chen
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College of Material Science and Technology,Nanjing University of Aeronautics & Astronautics,Nanjing 210016,China
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| Abstract: |
| In order to provide a method for developing composite stealth particles,SiO2@ Bi2O3 particles with spherical core-shell structure were prepared by sol-gel method. The structure,morphology and emissivity of the particles were characterized by XRD,TEM and infrared emissometer. XRD measurement indicates that the pure phase of Bi2O3can be obtained at 700 ℃. TEM validates the formation of core-shell structure of SiO2@ Bi2O3 spheres. The IR emissivity measurements indicate that the high emissivity of SiO2 in the ranges of 3 ～ 5 μm and 8 ～ 14 μm can be lowered by coating a thin layer of Bi2O3 on the surface of SiO2 spheres. Therefore,the as-synthesized core-shell structured SiO2@ Bi2O3 spheres can improve the IR shielding property. |
| Key words: core-shell structure infrared emissivity bismuth oxide |
