UNSPECIFIED (1999) Thermal conductivity of uranium dioxide up to 2900 K from simultaneous measurement of the heat capacity and thermal diffusivity. JOURNAL OF APPLIED PHYSICS, 85 (2). pp. 776-789. ISSN 0021-8979.

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Abstract

The thermal diffusivity and heat capacity of uranium dioxide have been measured from 500 to 2900 K with an advanced laser-flash technique. These two quantities were determined simultaneously by means of an accurate numerical fitting of the experimental thermograms. At high temperatures the precision of the method used is much better than that associated with conventional laser-flash measurements. It was found that the heat capacity continues to increase even at temperatures above the expected lambda transition (2670 K). The inverse of the thermal diffusivity increases linearly with temperature up to 2600 K, whilst at higher temperatures the slope markedly decreases. A new expression for the thermal conductivity as a function of temperature is proposed, which is corroborated by some theoretical considerations on the underlying heat transport mechanisms. (C) 1999 American Institute of Physics. [S0021-8979(99)05902-2].

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Journal or Publication Title:	JOURNAL OF APPLIED PHYSICS
Publisher:	AMER INST PHYSICS
ISSN:	0021-8979
Official Date:	15 January 1999
Dates:	Date Event 15 January 1999 UNSPECIFIED
Volume:	85
Number:	2
Number of Pages:	14
Page Range:	pp. 776-789
Publication Status:	Published

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