We have developed a new technique to research thermal transport properties of solid materials at cryogenic temperatures. It is based on an optical ac calorimetry for the measurement of thermal diusivity. This paper presents new ac calorimeters with sophisticated laser heating systems that realize ve
Thermal diffusivity measurement of thin film by AC calorimetric technique
β Scribed by Y. Sasuga; R. Kato; A. Maesono; I. Hatta
- Book ID
- 107859142
- Publisher
- Elsevier Science
- Year
- 1985
- Tongue
- English
- Weight
- 185 KB
- Volume
- 92
- Category
- Article
- ISSN
- 0040-6031
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The thermal diffusivity of YBa 2 Cu 3 O 7Γx (YBCO) film was measured using the optical pump-probe method. A theoretical finite-difference model was employed to calculate the diffusivity value, and the best fit for the c-axis oriented YBCO film showed an average thermal diffusivity of 0.25 Β± 0.05 mm
The thermal di β usivity (a) of paper, a porous and thin material, was determined by an ac Joule heating method developed in our laboratory. With this technique the thermal di β usivity of paper was obtained directly with high reproducibility without the need for special preparations, such as the blac