Thermophysical Parameters of Optical Glass BK 7 Measured by the Pulse Transient Method
Thermophysical Parameters of Optical Glass BK 7 Measured by the Pulse Transient Method
复制标题
脉冲瞬态法测量光学玻璃 BK 7 的热物理参数
DOI：
10.1007/s10765-005-4512-y
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发表时间：
2005
影响因子：
2.2
通讯作者：
U. Hammerschmidt
中科院分区：
文献类型：
--
作者：
L. Kubičár;V. Vretenár;U. Hammerschmidt
本文主要研究脉冲暂态法。分析了该方法的原理和测量时段（时间窗）。分析结果在硼硅冠玻璃BK7上得到验证，BK7是导热系数标准的候选材料。热接触和表面效应影响评估程序应用的时间窗口的长度。将一点法与利用差值分析发现的时间窗拟合结果进行了比较。利用单点评价技术，得到的导热系数、热扩散系数和比热分别为1.05 W·m−1·K−1、0.548 × 10−6m−2·s−1和767 J·kg−1·K−1。
This paper is focused on the pulse transient method. The theory of the method and the measuring regime (time window) are analyzed. The results of the analysis are verified on borosilicate crown glass BK7, which is a candidate for a standard for thermal conductivity. Thermal contact and surface effects affect the length of the time window in which the evaluation procedure is applied. The one-point evaluation technique is compared with the results of the fitting procedure that uses the time window found by difference analysis. The values of the thermal conductivity, thermal diffusivity, and specific heat were found to be 1.05 W· m−1· K−1, 0.548 × 10−6m− 2· s−1, and 767 J· kg−1· K−1, respectively, using the one-point evaluation technique.