Laser-Induced Breakdown Spectroscopy of Molten Metals: Influence of Sample Temperature

被引：4
作者：
Vaculovic, Tomas [1 ]
Zverina, Zbynek [1 ]
Otruba, Vitezslav [1 ]
Kanicky, Viktor [1 ]
机构：
[1] Masaryk Univ, Fac Sci, Dept Chem, CS-60177 Brno, Czech Republic
来源：
ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES | 2011年 / 66卷 / 10-11期
关键词：
Laser-Induced Breakdown Spectroscopy; Molten Metals; Sample Temperature; ALLOY;
D O I：
10.5560/ZNA.2011-0021
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The aim of this work was to determine the influence of sample temperature on the laser-induced microplasma (LIP) emission intensity and to ascertain the possibility of laser-induced breakdown spectroscopy (LIBS) utilization for the monitoring of impurities in molten metals. Pure low-melting metals (bismuth, gallium, indium, lead, tin, and zinc) were used for all experiments. It was found out that the LIP emission increases linearly with increasing temperature within the range 25 degrees C to 70 degrees C above the melting point of the metal. The slope of this change in LIP intensity is related to the transition probability of a given emission line. If the LIP intensity of given solid and molten metals are compared, then their relative change is related to the coefficient of thermal conductivity. The LIBS shows possibilities for the identification of impurities in molten metals. Amounts of impurities in the order of tens mg/kg can be identified.
引用
收藏
页码：643 / 648
页数：6
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