| 核-壳结构粒子SiO_2@Bi_2O_3的制备及红外发射率研究 |
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| 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SiO_2@Bi_2O_3的制备及红外发射率研究[J].材料科学与工艺,2010,18(1):43-45. |
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| 作者姓名： | 邵春明 罗艳 徐国跃 申星梅 余慧娟 胡晨 |
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| 作者单位： | 南京航空航天大学,材料科学与技术学院,南京,210016;南京航空航天大学,材料科学与技术学院,南京 |
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| 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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| 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.
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| 关 键 词： | 核-壳结构 红外发射率 氧化铋 |
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 and HU Chen.Preparation and infrared emissivity properties of core-shell structured SiO2@Bi2O3 spheres[J].Materials Science and Technology,2010,18(1):43-45. |
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| Authors: | SHAO Chun-ming LUO Yan XU Guo-yue SHEN Xing-mei YU Hui-juan and HU Chen |
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| Affiliation: | 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. |
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| Keywords: | core-shell structure infrared emissivity bismuth oxide |
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