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AIST TODAYNo.22 Autumn 2006 [ PDF:3.5MB ]


Subsecond Multi-Property Measurement for Thermal Design

Hiromichi Watanabe
Metrology Institute of Japan
e-mail address

We have developed a method for simultaneously measuring four kinds of thermophysical properties of electrically conductive materials at high temperatures. In this method, a plate-shaped sample is rapidly heated up to a high temperature by passing an electrical current pulse through it. After that, a surface of the sample is irradiated by a laser pulse. Thermal conductivity, specific heat, total emissivity, and electrical resistivity are derived from the temperature response of the sample due to the electrical-optical hybrid pulse heating. The major advantage of this method is the minimum exposure of the sample to high temperature, which can minimize the contamination of the sample.

Figure

Figure : Schematic diagram of electrical-optical hybrid pulse-heating system for a subsecond multi-property measurement.

Relational Information

AIST TODAY Vol.6, No.9 (2006) p.30-31



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