Laser-induced incandescence study on the metal aerosol particles as the effect of the surrounding gas medium.
Laser-induced incandescence study on the metal aerosol particles as the effect of the surrounding gas medium.
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DOI：
10.1021/jp058044n
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发表时间：
2005-10
期刊：
影响因子：
--
通讯作者：
Y. Murakami;Tsuyoshi Sugatani;Y. Nosaka
中科院分区：
文献类型：
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作者：
Y. Murakami;Tsuyoshi Sugatani;Y. Nosaka
利用ICCD探测器和多通道光谱仪，研究了1064 nm脉冲激光辐照钼气溶胶粒子引起的基本传热现象。利用普朗克函数计算了粒子的温度，研究了激光加热粒子的冷却过程。通过测量不同介质对激光加热颗粒温度的影响，讨论了蒸发、热辐射、热传导等传热过程对颗粒温度的影响。通过监测气溶胶颗粒的激光诱导白炽光谱中组分钼原子的发射以及通过研究白炽强度与1064 nm脉冲激光能量密度之间的关系，研究了蒸发过程对总传热现象的影响。使用热传导理论的计算表明，由Mo（CO）6光解产生的颗粒的直径取决于周围气体的性质。
The fundamental heat transfer phenomena caused by the 1064 nm pulsed laser irradiations on the molybdenum aerosol particles were investigated by monitoring the time evolutions of the incandescence spectra using an ICCD detector with a multichannel spectrograph. The particle temperatures were evaluated from the incandescence spectra with the Planck function, and the cooling processes of the laser-heated particles were investigated. By measuring the decrease in the laser-heated particle temperatures with different surrounding media, the roles of the heat transfer processes such as vaporization, thermal radiation, and heat conduction to the surrounding media were discussed. The influences of the vaporization processes on the total heat transfer phenomena were investigated by monitoring the emissions of the constituent molybdenum atoms in the laser-induced incandescence spectra of the aerosol particles and also by investigating the relationships between the intensity of the incandescence and the fluence of the 1064 nm pulsed laser. The calculations using the theory of heat conduction suggested that the diameters of the particles produced by the photolysis of Mo(CO)6 depended on the nature of the surrounding gases.