MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Thermodynamic Properties of AlNd Determined by Low Temperature Heat Capacity Measurements
Masao MorishitaHiroaki YamamotoShinya KojimaTomohiro Horike
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2007 Volume 48 Issue 7 Pages 1961-1964

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Abstract

The thermodynamic properties of AlNd were investigated by measuring the heat capacity, Cp, from near absolute zero (2 K) to 300 K using the relaxation method. During the measurement of the Cp(AlNd), 4 thermal anomalies were found on the Cp curve at 75.34, 39.79, 25.77, and 6.95 K. The third law entropy of AlNd at 298 K was obtained by integrating the polynomials for the measured Cp values. The result was as follows: S_298(AlNd)/J·K−1·mol−1=93.72±0.47. Using this value, the standard entropy of formation at 298 K was obtained as follows: Δ_fS^o_298(AlNd)/J·K−1·mol−1=-6.18±0.94.

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© 2007 The Japan Institute of Metals and Materials
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