| 激光能量对粉煤灰未燃碳测量的影响 |
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| 引用本文： | 姚顺春,陆继东,谢承利,李捷,潘圣华,何泽雄.激光能量对粉煤灰未燃碳测量的影响[J].光谱学与光谱分析,2009,29(8):2025-2029. |
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| 作者姓名： | 姚顺春 陆继东 谢承利 李捷 潘圣华 何泽雄 |
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| 作者单位： | 1. 华南理工大学电力学院，广东 广州 510640
2. 华中科技大学煤燃烧国家重点实验室，湖北 武汉 430074 |
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| 摘 要： | 搭建了基于激光诱导击穿光谱技术的成分分析应用研究台架，应用于粉煤灰未燃碳的检测，考察不同能量的脉冲激光烧蚀粉煤灰样品时的等离子体特性。使用多通道光纤光谱仪和CCD探测器对激光烧蚀形成的等离子体发射信号进行分光和探测。分析碳谱线强度、等离子体温度和电子密度随激光能量变化的趋势，掌握激光能量对粉煤灰未燃碳测量的影响规律。研究结果显示，随着激光能量的增大，碳谱线强度、等离子体温度和电子密度均先增大后减小，空气击穿明显增强。随后碳谱线强度的变化趋于平缓并开始下降。合适的激光能量可以增强等离子体发射信号，并避免强烈空气击穿的不利影响，有助于提高测量精度。
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| 关 键 词： | 激光诱导击穿光谱 激光能量 煤灰未燃碳 谱线强度 电子密度 空气击穿 |
| 收稿时间： | 2008/10/6 |
Impact of Laser Energy on Measurement of Fly Ash Carbon Content |
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| YAO Shun-chun,LU Ji-dong,XIE Cheng-li,LI Jie,PAN Sheng-hua,HE Ze-xiong.Impact of Laser Energy on Measurement of Fly Ash Carbon Content[J].Spectroscopy and Spectral Analysis,2009,29(8):2025-2029. |
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| Authors: | YAO Shun-chun LU Ji-dong XIE Cheng-li LI Jie PAN Sheng-hua HE Ze-xiong |
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| Institution: | 1. Power Electric College in South China University of Technology，Guangzhou 510640, China2. State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China |
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| Abstract: | A laser induced breakdown spectroscopy-based apparatus for the analysis of element,employing a 532 nm laser and a multi-channel optical spectrometer with a non-intensified CCD array,has been built and tested. It was applied to analyze the carbon content of coal fly ash. Seven groups of pulse laser in the range of 35 to 98 mJ were used to ablate the fly ash samples. The electron densities and plasma temperatures with different laser energy were determined,and the influence of laser energy on the intensity of... |
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| Keywords: | Laser-induced breakdown spectroscopy (LIBS) Laser energy Unburned carbon Line intensity Electronic density Air breakdown |
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