大学物理 ›› 2015, Vol. 34 ›› Issue (11): 31-31.
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柯磊[1] 任祺君[2] 袁艳红[1]
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摘要： 通过模拟导热系数测量中的两种常见误操作，分析了误操作对导热系数测量的影响．结果表明，样、盘未对齐5～10％时，导热系数减小1．1～6．7％；低于稳态3～4℃测试时，导热系数减小35．8—45．3％．实验中，误操作加剧了两盘的温差并且减小了散热盘稳态处的曲率，导致导热系数减小．分析误操作有助于优化实验方法，能更好地指导高校实验教学．
关键词: 误操作, 导热系数, 稳态法
Abstract: Two common misoperations of stablestate method for thermal conductivity measurement are simulated. The effects of misoperations on thermal conductivity are investigated. Experimental results have shown that a misalignment of 5 ~ 10% between the sample and the plate causes 1.1 - 6.7% difference in thermal conductivity. The test with the steady temperature of 44 ℃ or 43 ℃ causes 35.8% and 45.3% difference in thermal conductivity, respectively. The changes in the temperature of radiating plate and the curvature of steady-state point, which are resul- ted from the misoperations, are identified as the origin for the changed thermal conductivity. The analysis of misopera- tion is good for optimizing the experimental method and serving the college experimental teaching.
Key words: misoperation, thermal conductivity, stable-state method
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柯磊[] 任祺君[] 袁艳红[]. 两种常见误操作对导热系数测量的影响[J]. 大学物理, 2015, 34(11): 31-31.
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