基于激光诱导击穿光谱技术的水垢成分分析  

The Composition Analysis of Water Scale Using LIBS

作　　者：王玉琴[1] 宋小荣[1] 罗文峰[2] 赵小侠[3] 

机构地区：[1]郑州大学教育技术中心,河南郑州450001 [2]西安邮电大学电子工程学院,陕西西安710121 [3]西安文理学院物理与机械电子工程学院,陕西西安710065

出　　处：《郑州大学学报（理学版）》2013年第4期63-67,共5页Journal of Zhengzhou University:Natural Science Edition

基　　金：陕西省教育厅科研计划项目;编号2013JK0620;西安市科技计划项目;编号CX12189WL02

摘　　要：将1 064 nm激光聚焦到水垢上产生等离子体,通过分析水垢等离子体光谱,定性地证认元素钙和镁.通过10条钙原子谱线的Boltzmann图,计算得到水垢等离子体的电子温度是4 793 K.通过测量镁原子谱线285.21 nm的Stark展宽,求得水垢等离子体的电子密度是6.1×1018cm-3.实验结果表明,激光诱导产生的水垢等离子体满足局部热力学平衡模型,并处于光学薄状态,等离子体的频率是2.2×1013Hz,韧制吸收系数为8.87 cm-1.The water scale plasma was produced by focusing the 1 064 nm laser onto the water scale. El- ements Ca, Mg were identified by the analysis of the plasma spectra. The plasma temperature 4 793 K was inferred using the Bohzmann plot method with ten neutral calcium lines, while the electron density 6.1 × 1018TM cm-3 was obtained from the Stark broadening of the profile of Mg I 285.21 nm. Based on ex- perimental results, the laser-induced water scale plasma was verified to be in local thermodynamic equi- librium and free from self-absorption. At the same time, the plasma frequency of 2.2 × 1013 Hz and the inverse bremsstrahlung absorption eoefficieney of 8.87 cm -1 were obtained.

关 键 词：激光诱导击穿光谱 原子发射光谱 等离子体 水垢 

分 类 号：O53[理学—等离子体物理]