Murakami Yoshinori, Sugatani Tsuyoshi, Nosaka Yoshio
Department of Chemistry, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan.
J Phys Chem A. 2005 Oct 13;109(40):8994-9000. doi: 10.1021/jp058044n.
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.
通过使用带有多通道光谱仪的ICCD探测器监测炽热光谱的时间演化，研究了1064 nm脉冲激光辐照钼气溶胶颗粒引起的基本传热现象。根据普朗克函数从炽热光谱中评估颗粒温度，并研究激光加热颗粒的冷却过程。通过测量不同周围介质中激光加热颗粒温度的降低，讨论了诸如蒸发、热辐射和向周围介质的热传导等传热过程的作用。通过监测气溶胶颗粒激光诱导炽热光谱中组成钼原子的发射，并研究炽热强度与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。使用热传导理论进行的计算表明，Mo(CO)6光解产生的颗粒直径取决于周围气体的性质。
