粉煤灰表面形貌和组成的电子显微镜/能量色散谱、聚焦离子束分析  

Study on Both Shape and Chemical Composition at the Surface of Fly Ash by Scanning Electron Microscope, Focused Ion Beam, and Field Emission-Scanning Electron Microscope

作　　者：彭敏[1] 阮湘元[1] 陈小明[2] 徐经伟[3] 蒋致诚[1] 

机构地区：[1]东莞理工学院应用化学系,东莞523106 [2]湘潭大学化学院,湘潭411105 [3]中国科学院长春应用化学研究所电分析和光谱分析研究中心,长春130022

出　　处：《分析化学》2004年第9期1196-1198,共3页Chinese Journal of Analytical Chemistry

基　　金：广东省重点攻关资助项目 (No .2 0 0 3A3 0 60 3 0 2 );广东省教育厅基金资助项目 (No .Ζ0 2 0 84)

摘　　要：用超级场发射电子显微镜 (FE SEM) ,扫描电子显微镜 /能量色散谱 (SEM/EDS)和聚焦离子束测试仪(FIB)等 ,对粉煤灰进行了表面形貌和元素组成分析。FIB显示粉煤灰大多为 0 .3～ 0 .5 μm的球状微粒 ;FE SEM则显示约有 88%的粉煤灰为 0 .3～1 μm的球状微粒 ,表面凹凸不平 ,主要为铝、硅、铁等元素的氧化物 ,其中铝、硅、铁和氧的质量分数分别为 2 0 .5 %、2 3 .6%、1 .4%和 5 0 .9%。Micro-appearance and chemical composition at the surface of fly ash collected from Sha Zhou Power Station of Guangdong Were measured with field emission-scanning electron microscope (FE-SEM), scanning electron microscope/energy disperse spectrum (SEM/EDS) and focused Ion beam (FIB) in this paper. In FIB, it shows that the fly ash are spherical particles with diameter from 0.3 mum to 0. 5 mum and gather together to become larger group by 6 similar to 10 particles. Images of FE-SEM show that most of the fly ash are spherical particles with diameter of 0.1 similar to 1 mum and very rough at the surface cohered with much smaller spherical particles. The surface is composed of oxides of Si, Al, Fe, Ca, Mg, Cu, Zn, and Ti, with 23.6% Si, 20.5% Al, 1.43% Fe and 50.9% O.

关 键 词：粉煤灰 表面形貌 元素组成 扫描电子显微镜 能量色散谱 聚焦离子束 燃煤电厂废弃物 

分 类 号：O657.7[理学—分析化学]