Abstract
The enthalpies of formation of ZrW2O8 and HfW2O8 , compounds exhibiting negative thermal expansion over a wide temperature range, were estimated from the enthalpies of changes in the oxygen coordination of cations upon the formation of mixed oxides from binary oxides. The formation of both tungstates from constituent oxides is accompanied by heat absorption.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
REFERENCES
Sleight, A.W., Isotropic Negative Thermal Expansion, Annu. Rev. Mater. Sci., 1998, vol. 28, pp. 29–43.
Pryde, A.K.A., Dove, M.T., and Heine, V., Simulation Studies of ZrW2O8 at High Pressure, J. Phys.: Condens. Matter, 1998, vol. 10, no. 38, pp. 8417–8428.
Hashimoto, T., Katsube, T., and Morito, Y., Observation of Two Kinds of Phase Transitions of ZrW2O8 by Power-Compensated Differential Scanning Calorimetry and High-Temperature X-ray Diffraction, Solid State Commun., 2000, vol. 116, pp. 129–132.
Chang, L.L.Y., Scroger, M.G., and Phillips, B., Condensed Phase Relations in the Systems ZrO2–WO2– WO3 and HfO2–WO2–WO3, J. Am. Ceram. Soc., 1967, vol. 50, no. 4, pp. 211–215
Termicheskie konstanty veshchestv: Spravochnik (Thermal Constants of Substances: A Handbook), Glushko, V.P., Ed., Moscow: VINITI, 1965–1982.
Reznitskii, L.A., Kristalloenergetika oksidov (Crystal Energetics of Oxides), Moscow: Dialog-MGU, 2000, 2nd ed.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Reznitskii, L.A. Enthalpies of Formation of Negative-Thermal-Expansion Mixed Oxides. Inorganic Materials 38, 1020–1021 (2002). https://doi.org/10.1023/A:1020525321044
Issue Date:
DOI: https://doi.org/10.1023/A:1020525321044