A step-wise method for measuring thermophysical parameters of materials

被引：59

作者：

Kubicár, L ^{[1
]}

Bohác, V ^{[1
]}

机构：

[1] Slovak Acad Sci, Inst Phys, Bratislava 84228, Slovakia

来源：

MEASUREMENT SCIENCE AND TECHNOLOGY | 2000年 / 11卷 / 03期

关键词：

transient method; step-wise method; specific heat; thermal diffusivity; thermal conductivity;

D O I：

10.1088/0957-0233/11/3/312

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A version of a transient method for measuring specific heat, thermal diffusivity and thermal conductivity is presented. The dynamic temperature held is generated by the passage of the electrical current through a planar electrical resistance made of thin metallic foil. The heat is produced in the form of a step-wise function. A thermocouple placed apart from the heat source measures the temperature response. The theory of the method, its experimental arrangement and the measuring regime for considering sensitivity coefficients art: presented. Experimental data obtained on Perspex are compared with recommended and published data. The data on thermal conductivity agree to within +/-0.7% whereas the specific heat is lower on average by 5.2% and the thermal diffusivity is higher by 3.5% when measurements were realized in vacuum. A shift in data of up to 10% was found for measurements made in air.

引用

页码：252 / 258

页数：7

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