ABSTRACT

We report the development of transparent high-thermal-conductivity nanofluids for enhanced flow cooling of solid-state laser crystal rods. The transparent nanofluids were prepared by dispersing citrate-stabilized Au nanoparticles in water and strictly controlling the particle size and loading. The Au nanofluids have shown stable dispersion, high optical transparency at the excitation wavelength of the YAG solid-state laser (808 nm), and 50% increase of thermal conductivity. Experimental measurement and theoretical simulation of circulating flow cooling show that the heat dissipation capacity of the lasering rod could be increased by more than 20% by using the Au nanofluids to replace pure water coolant.Abbreviations: Au: Gold; NP: Nanoparticle; Au NP: Gold nanoparticle; SEM: Scanning electron microscopy

摘要

我们报告了用于增强固态激光晶体棒流动冷却的透明高导热纳米流体的开发。通过将柠檬酸盐稳定的Au纳米颗粒分散在水中并严格控制粒径和负载量来制备透明纳米流体。金纳米流体在 YAG 固态激光器的激发波长 (808 nm) 下表现出稳定的色散、高光学透明度和 50% 的热导率增加。循环流冷却的实验测量和理论模拟表明，使用Au纳米流体代替纯水冷却剂，激光棒的散热能力可以提高20%以上。NP：纳米粒子；Au NP：金纳米粒子；SEM：扫描电子显微镜