Determination of plasma temperature and electron density of iron in iron slag samples using laser induced breakdown spectroscopy

14th International Symposium on Advanced Materials

Hussain, T.^1 ; Gondal, M.A.^2 ; Shamraiz, M.^1

National Institute of Vacuum Science and Technology, P. O. Box 3125, Islamabad, Pakistan^1

Laser Research Laboratory, Physics Department, King Fahd University of Petroleum and Minerals (KFUPM), Box 5047, Dhahran

31261, Saudi Arabia^2

关键词: Boltzmann distribution;    Laser induced plasma;    Laser-pulse energy;    Line intensities;    Local thermal equilibrium;    Optimal experimental conditions;    Plasma temperature;    Quantitative measurement;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/146/1/012017/pdf
DOI  :  10.1088/1757-899X/146/1/012017

来源: IOP

【 摘 要 】

Plasma temperature and electron density of iron in iron slag samples taken from a local plant is studied. Optimal experimental conditions were evaluated using Nd: YAG laser at 1064 nm. Some toxic elements were identified and quantitative measurements were also made. Plasma temperature and electron density were estimated using standard equations and well resolved iron spectral lines in the 229.06-358.11 nm region at 10, 20, 30 and 40 mJ laser pulse energy with 4.5 μs delay time. These parameters were found to increase with increase in laser pulse energy. The Boltzmann distribution and experimentally measured line intensities support the assumption that the laser-induced plasma was in local thermal equilibrium. It is worth mentioning that iron and steel sector generates tons of solid waste and residues annually containing variety of contaminants which can be harmful to the environment and therefore knowledge, proper analysis and investigation of such iron slag is important.