Thermal expansion and structural properties of (CuAlTe2)1–x(CuAlSe2)x solid solutions

✍ Scribed by B. V. Korzun; A. A. Fadzeyeva; K. Bente; W. Schmitz; S. Schorr

• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: English
• Weight: 193 KB
• Volume: 41
• Category: Article
• ISSN: 0232-1300
• DOI: 10.1002/crat.200510550

✦ Synopsis

Abstract

Investigations of the thermal expansion of (CuAlTe~2~)~1–x~(CuAlSe~2~)~x~ solid solutions in the temperature range from 100 to 800 K have been carried out for the first time. It has been demonstrated that the thermal expansion coefficient α~L~ grows considerably in the temperature range from 100 to 300 K, whereas the temperature dependence above 300 K is rather weak. The isotherms of composition dependence of the thermal expansion coefficient α~L~ for 100, 293, 500 and 800 K were constructed, and it was found that linear relations could express them. The Debye temperatures θ~D~ , the average mean‐square dynamic displacements $ \bar u ^2 $, the average root‐mean‐square amplitudes of thermal vibration RMS , the anion position parameter u using S. C. Abrahams & J. L. Bernstein (u~AB~ ) and J. E. Jaffe & A. Zunger (u~JZ~ ) models were calculated. The composition dependence of microhardness H using the phenomenological theory was also calculated, and it was discovered that this dependence has a non‐linear character with a maximum of 383 kg/mm^2^ at x=0.67. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)