对热的不良导体热导率测量中环境影响因素研究

Research on Environmental Influences in the Process of Measuring Thermal Conductivity of Poor Conductor

指出了当前大学物理实验课中学生利用稳态法测量不良导体的热导率时对实验环境的选择不够重视。在不同实验环境下进行了此实验,比较实验测量结果,发现实验环境选择不恰当对实验结果影响很大,并指出测量不良导体热导率应在室温较高的密闭室,同时将杜瓦瓶部分放置在温度较低的环境里进行测量精确较高。

In the college physics experiment Class, the undergraduates don＇t attach enough importance to the choice of experimental environment when using steady--state method to measure thermal conductivity of poor conductor. This article finds that the improper choices of experimental environment have a great effecton experimental result. And it points out that the measurement of thermal conductivity of poor conductor should take place in the closed room with higher temperature, and meanwhile, the Dewar flask should be put in the lower tempera- ture, so taht the measurement results are more accurate by comparing with measurement results in the different envi- ronment.