共沉淀法制备Al/Cr_2O_3复合粒子及其性能研究  

Preparation by Coprecipitation and Properties of Al/Cr_2O_3 Composite Particles

作　　者：陈娇[1] 黄啸谷[1] 王丽熙[1] 张其土[1,2] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009 [2]南京工业大学江苏省无机及其复合新材料重点实验室,江苏南京210009

出　　处：《稀有金属》2010年第3期455-459,共5页Chinese Journal of Rare Metals

基　　金：国家部委科技资助项目(JPPT-1251)

摘　　要：采用共沉淀法将Cr2O3复合于片状金属铝粉表面获得了包覆效果好的Al/Cr2O3复合粒子。为了保证复合粒子的红外隐身性能,对前躯体粒子Al/Cr(OH)3进行了TG-DSC测试,确定了对前躯体的热处理温度;同时借助于XRD,SEM测试对制得的Al/Cr2O3粉末的相组成和形貌进行了表征,此外,将Al/Cr2O3粉末制成红外隐身涂层进行红外辐射率性能测试。结果表明,当铝粉含量为50%(质量分数)时制得的Al/Cr2O3复合粒子包覆较为完整,红外辐射率值最低为0.77。Cr2O3对片状Al粉的包覆在降低红外辐射率的同时不仅避免了Al粉的"显形"和氧化,其本身的绿色还可以起到可见光隐身的效果,在林地的迷彩隐身中具有重要的应用价值。Al/Cr2O3 composite particles were prepared by coprecipitation method.In order to keep the IR camouflage performance of the composite particles,heat treatment temperature of the as-precipitated precursor of Al/Cr(OH)3 was confirmed by TG-DSC.The phase composition and morphologies of the Al/Cr2O3 composite particles were studied by XRD and SEM.The infrared emissivity of Al/Cr2O3 infrared stealth coatings was tested.The results showed that the composite particles were coated totally and the minimum value of in...

关 键 词：Al/Cr2O3复合粒子 共沉淀法 深绿色 红外辐射率 

分 类 号：TB381[一般工业技术—材料科学与工程]