热带法测量导热系数时材料最小厚度的确定

在介绍了热带法测量导热系数原理的基础上,通过fluent软件建立了数理模型,对热带法测量导热系数过程中材料厚度对测试结果的影响进行分析计算。在保证合理温升与可接受误差范围前提下,得到不同导热系数材料对应的最小可测厚度,并结合自行搭建的导热系数测试设备选取不同材料进行实验验证。结果表明：根据预估材料导热系数的大小从而确定其最小可测量厚度的方法有效,既解决了以往测试中所有材料要求同一测量厚度而带来的制样困难,将材料可测厚度从原来25 mm减小到了5 mm,甚至更薄,扩大了可测材料范围,又减小了以往叠加测量带来的接触热阻误差,提高了测试精度。对提升热带法测试技术水平及灵活应用有一定的借鉴意义。...

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Bibliographic Details
Published in实验室研究与探索 Vol. 34; no. 8; pp. 28 - 31
Main Author 雒彩云 杨莉萍 陶冶 徐子君 钟秋
Format Journal Article
LanguageChinese
Published 中国科学院上海硅酸盐研究所,上海,200050 2015
Subjects
fluent数值模拟
导热系数
最小测量厚度
热带法
导热系数
最小测量厚度
fluent numerical simulation
hot-strip method
fluent数值模拟
thermal conductivity
minimum measurable thickness
热带法
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ISSN1006-7167

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Summary:在介绍了热带法测量导热系数原理的基础上,通过fluent软件建立了数理模型,对热带法测量导热系数过程中材料厚度对测试结果的影响进行分析计算。在保证合理温升与可接受误差范围前提下,得到不同导热系数材料对应的最小可测厚度,并结合自行搭建的导热系数测试设备选取不同材料进行实验验证。结果表明：根据预估材料导热系数的大小从而确定其最小可测量厚度的方法有效,既解决了以往测试中所有材料要求同一测量厚度而带来的制样困难,将材料可测厚度从原来25 mm减小到了5 mm,甚至更薄,扩大了可测材料范围,又减小了以往叠加测量带来的接触热阻误差,提高了测试精度。对提升热带法测试技术水平及灵活应用有一定的借鉴意义。
Bibliography:LUO Cai-yun;YANG Li-ping;TAO Ye;XU Zi-jun;ZHONG Qiu（Shanghai Institute of Ceramics,Chinese Academy of Science,Shanghai 200050,China）
thermal conductivity hot-strip method minimum measurable thickness fluent numerical simulation
Based on the principle of hot-strip method for measuring thermal conductivity,a mathematical model was established by Fluent for simulating the effect of material thickness on measuring thermal conductivity. Within the reasonable temperature rise and acceptable error range,the minimum measurable thickness for different material were obtained. And the simulated result was experimentally validated by test system designed by authors. The result showed that through rough estimation of thermal conductivity for different material,the minimum measurable thickness can be determined. This method can effectively solve the problem that the sample preparation is difficult because all materials required the same thickness previously. The measurable thickness of the material is decreased from 25 mm to
ISSN:1006-7167