【摘要】 本文描述用光子相关光谱确定液体导温系数的方法。与常规方法不同,这一技术不需要温差,试样处于热力学平衡状态,因而不存在自然对流和热辐射的影响。本工作建立了国内第一台激光瑞利散射实验台,并利用它测量了甲苯、苯、丙酮、甲醇以及四氯化碳的导温系数,测量不确定度估计不超过1.5％。更多还原

【Abstract】 The laser light scattering techniques in combination with the photoncorrelation spectroscopy have been employed to measure the thermal diffusivity of liquids. Several pure organic liquids have been investigated. The value of thermal diffusivity obtained is typically accurate to 1.5%. Comparing to the values obtained by conventional methods, our results are some smaller.更多还原