摘要
针对导热系数测量实验等待稳态时间过长的问题,提出了改进的方法,即将热源初始设定为高温模式,使待测样品快速吸收达到目标稳态所需的热量,再将热源设定温度切换回目标稳态常用的温度设置.该方法能将等待稳态所需的时间缩短一半以上(仅需37min),提高了实验效率.同时指出了热源从高温模式切换回低温模式时机的选择会影响等待稳态所需的时间,但对导热系数测量值几乎没有影响.
To reduce the waiting time in the experiment of measuring heat conductivity coefficient,a thermal bombardment was proposed.The heating source was initially set to high temperature mode,so that the sample could quickly achieve the preset temperature,and then switch the heat source temperature back to common value.With this method,half of waiting time could be saved,while the error remains nearly the same with that in traditional method.Moreover,the switch moment of the heating source temperature influenced the waiting time,but the measured value of the heat conductivity coefficient was not affected.
出处
《物理实验》
2017年第10期18-21,共4页
Physics Experimentation
基金
国家自然科学基金项目(No.11504264)
天津工业大学大学物理实验团队(No.2012-B-07)
天津工业大学高等教育教学改革研究项目(No.2015-2-33)
关键词
导热系数
稳态
冷却速率
不良导体
measuring heat conductivity
coefficient
bombardment
heating source
temperature mode
heat source
