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Thermal expansion and structural properties of (CuAlTe 2 ) 1–x (CuAlSe 2 ) x solid solutions
Author(s) -
Korzun B. V.,
Fadzeyeva A. A.,
Bente K.,
Schmitz W.,
Schorr S.
Publication year - 2006
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.200510550
Subject(s) - thermal expansion , thermodynamics , debye model , atmospheric temperature range , thermal , amplitude , bar (unit) , debye , chemistry , physics , condensed matter physics , analytical chemistry (journal) , quantum mechanics , chromatography , meteorology
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)