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Axial thermal expansion of ZrO 2 and HfO 2 in the range room temperature to 1400°C
Author(s) -
Patil R. N.,
Subbarao E. C.
Publication year - 1969
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889869007217
Subject(s) - monoclinic crystal system , tetragonal crystal system , thermal expansion , materials science , crystallography , anisotropy , atmospheric temperature range , mineralogy , chemistry , crystal structure , thermodynamics , optics , composite material , physics
The axial thermal expansion of monoclinic and tetragonal ZrO 2 and of monoclinic HfO 2 was studied over the temperature range from room temperature to 1400 °C. The linear thermal expansion coefficients were calculated. Thermal expansion along (x 10 6 per °C) a = 10.31 monoclinic ZrO 2 , 11.60 tetragonal ZrO 2 , 9.34 monoclinic HfO 2 ; b = 1.35 monoclinic ZrO 2 , – tetragonal ZrO 2 , 2.98 monoclinic HfO 2 ; c = 14.68 monoclinic ZrO 2 , 16.08 tetragonal ZrO 2 , 13.10 monoclinic HfO 2 . Some aspects of the present study, such as anisotropy of thermal expansion and a pretransformation vibrational anomaly, are discussed briefly.