RADIATIVE HEAT-EXCHANGE METHOD FOR THERMAL-CONDUCTIVITY MEASUREMENT APPLYING A PERPENDICULAR HEAT-FLOW TO A THIN-PLATE SAMPLE - PRINCIPLE AND APPARATUS

被引：2

作者：

MATSUMOTO, T

ONO, A

机构：

[1] Thermophysical Metrology Department, National Research Laboratory of Metrology, Ibaraki, 305, 1-1-4 Umezono, Tsukuba

来源：

INTERNATIONAL JOURNAL OF THERMOPHYSICS | 1991年 / 12卷 / 05期

关键词：

LOW-CONDUCTIVITY MATERIALS; RADIATIVE HEAT EXCHANGE; RADIATION THERMOMETRY; THERMAL CONDUCTIVITY;

D O I：

10.1007/BF00502414

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

To measure thermal conductivity of materials of low conductivity (0.1 to 1 W.m-1.K-1), a method using a specimen of small size (2 x 25 x 25 mm) has been developed. This method applies a well-defined, steady, and uniform heat flux perpendicular to the surface of a small plate sample of polymers or ceramics jointly by means of radiative heat exchange as well as by an areal heater on the sample surface and allows a reasonably rapid (5-min) measurement of thermal conductivity. This method of measuring conductivity is an absolute and direct measurement method which does not need any standard reference materials or information about heat capacity. The principle of the method has been demonstrated by constructing a measurement apparatus and measuring thermal conductivity of a few materials. The thermal conductivities of silicone rubber and Pyrex (Corning 7740) glass measured by the present method between 30 and 90-degrees-C are compared with recommended values.

引用

页码：897 / 910

页数：14