一种用于冶金炉前快速分析的新仪器——激光诱导击穿光谱仪  

Laser-Induced Breakdown Spectrometer——A New Tool for Quick Analysis of On-the-Spot Sample in Metallurgy

作　　者：姚宁娟[1] 陈吉文[1] 杨志军[1] 王海舟[1] 

机构地区：[1]钢铁研究总院,北京100081

出　　处：《光谱学与光谱分析》2007年第7期1452-1454,共3页Spectroscopy and Spectral Analysis

基　　金：国家科技部科学仪器升级改造项目(JG-2001-42)资助

摘　　要：冶金炼钢要求快速分析冶金炉前样品来及时掌握冶炼过程。文章介绍了自主研制的一种新型的光谱仪——激光诱导击穿光谱仪,该仪器采用ns级脉宽的Nd∶YAG激光器作为样品离子化光源,激光聚焦样品表面激发产生的等离子体光谱依次经帕邢-龙格光学系统进行分光、光电倍增管探测、门控积分器积分、模拟数字转换器转换后获得的最终结果输入计算机进行数据处理。和目前冶金炉前样品分析常用的光谱仪相比,该仪器无需样品预处理,分析速度快(1 min或更少),准确灵敏度高,非常适用于冶金炉前样品的快速分析。近年来随着光纤技术的迅速发展,使用该仪器进行钢液实时在线分析和动态控制冶金工艺必将成为现实。In metallurgical steel making a quick analysis of on-the-spot sample is required to know the process of steel making. A new-type spectrometer, laser-induced breakdown spectrometer developed by ourselves, was presented in the present paper. A Nd .＂ YAG laser with pulse width of nanometer was used as an ionization and excitation source. Emission from the plasma appeared when the laser beam was focused on the surface of sample. After it was spectrally resolved by a Paschen-Runge polychromator, detected by photomultiplier detectors, integrated by gate intensifier, and converted by analog-to-digital converter, the final result was transmitted to a computer in order to complete data processing. Compared to the common spectrometer on-thespot in metallurgy, this instrument allows fast analyis without sample preparation （one minute or less）, with high precision and sensitivity, so it is very suitable for the analysis of on-the spot sample in metallurgy. In recent years with the fast development of optical fiber, on-line analysis of liquid steel and dynamical control of metallurgical processing will come true by using this instrument.

关 键 词：激光诱导击穿光谱仪 快速分析 炉前样品 

分 类 号：TH74[机械工程—光学工程] TH83[机械工程—仪器科学与技术]