激光诱导不同化学形态碳等离子体光谱特性研究  

Study on Properties of Plasma Spectroscopy of Laser-Induced Carbon Materials with Different Chemical Forms

作　　者：钟子铭[1] 陆继东[1] 郑建平[1] 董美蓉[1] 

机构地区：[1]华南理工大学电力学院,广东广州510640

出　　处：《光学学报》2011年第12期275-281,共7页Acta Optica Sinica

基　　金：国家自然科学基金(50576029;51071069)资助课题

摘　　要：选用4种不同形态碳元素样品(石墨、碳酸钙、无水对氨基苯磺酸和煤)进行激光诱导击穿光谱(LIBS)实验。通过改变激发环境氛围(大气、氮气和氩气),分析激发环境氛围对不同形态碳元素的原子发射光谱和分子发射光谱激发机制的影响,进而实现对不同形态碳元素的LIBS特性研究。研究结果表明,不同形态碳元素原子发射光谱C I的变化规律为在氩气中最强,在大气中次之,在氮气中最弱。而不同激发环境中,分子光谱C2和CN的变化规律与原子光谱C I的变化规律存在差异,这主要取决于样品本身的结构差异和等离子体与周围环境的相互作用机制。Four kinds of samples （graphite, CaCO3, NH2C6H4SO3H and coal） with different forms of carbon are used for laser-induced breakdown spectroscopy （LIBS） experiment. Different gases （air, nitrogen, argon） are used to analyze the influence of gases on atomic emission spectrum and molecular emission spectrum for carbon materials to study the LIBS properties for the carbon materials with different forms. The results show that the variation rules of neutral atomic emission C I intensities are that the strongest is in argon, the medium is in air and weakest in nitrogen. Since there are reversible reactions among molecular emission C2, N2 and CN, the variation rules of molecular emission C2 and CN depend on not only whether the samples themselves contain C-C, C=C or C-N, but also the interaction mechanism between the plasma and surrounding environment.

关 键 词：光谱学 激光诱导击穿光谱 碳元素 激发环境氛围 分子光谱 原子光谱 

分 类 号：O657.38[理学—分析化学] TK314[理学—化学]