@article{801400d2cda346f7a7b4d8c6cdf3c991,
title = "Thermochemistry and phase stability of the polymorphs of yttrium tantalate, YTaO4",
abstract = "Thermodynamic parameters of the three fergusonite-related polymorphs M{\textquoteright}, M and T of YTaO4 and their phase stabilities were investigated experimentally. The debate on the relative stability of the M and M{\textquoteright} phases was resolved, and it was shown that the compound does not transform to a cubic polymorph prior to melting. The enthalpies of formation of M and M{\textquoteright} were determined using high temperature oxide melt solution calorimetry, and the heat capacities and heat contents were measured. The enthalpy of the M{\textquoteright} to T phase transition was measured by differential thermal analysis. The stability of the T phase up to its melting at 2090 °C was demonstrated using high temperature X-ray diffraction and thermal analysis. Its enthalpy of fusion was determined using drop-and-catch calorimetry. The thermodynamic properties of YTaO4 assessed in this study enable the thermodynamic modeling of its polymorphs and related materials systems of technological importance.",
keywords = "Calorimetry, Oxide materials, Synchrotron radiation, Thermal analysis, Thermodynamic properties, YTaO, Yttrium tantalate",
author = "Maren Lepple and Ushakov, {Sergey V.} and Kristina Lilova and Macauley, {Chandra A.} and Fernandez, {Abel N.} and Levi, {Carlos G.} and Alexandra Navrotsky",
note = "Funding Information: The work was supported by the U.S. National Science Foundation (NSF) Award, grand DMR-1105672 and NSF-DMR 1835848 (changed to NSF-DMR 2015852 on funding move from UC Davis to ASU) and by the German Research Foundation (DFG) ( LE-3727/1-1 ). Use of the Advanced Photon Source (APS, beamline 6-ID-D), an Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory, was supported by the DOE under Contract No. DEACO2-06CH11357. Authors also acknowledge Chris Benmore, Rick Weber and Can Agca for help at the beamline during data collection, Kathrin Hofmann for help with Rietveld refinements and Melanie Thalheimer for help at the SEM. Funding Information: The work was supported by the U.S. National Science Foundation (NSF) Award, grand DMR-1105672 and NSF-DMR 1835848 (changed to NSF-DMR 2015852 on funding move from UC Davis to ASU) and by the German Research Foundation (DFG) (LE-3727/1-1). Use of the Advanced Photon Source (APS, beamline 6-ID-D), an Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory, was supported by the DOE under Contract No. DEACO2-06CH11357. Authors also acknowledge Chris Benmore, Rick Weber and Can Agca for help at the beamline during data collection, Kathrin Hofmann for help with Rietveld refinements and Melanie Thalheimer for help at the SEM. Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd",
year = "2021",
month = feb,
doi = "10.1016/j.jeurceramsoc.2020.10.039",
language = "English (US)",
volume = "41",
pages = "1629--1638",
journal = "Journal of the European Ceramic Society",
issn = "0955-2219",
publisher = "Elsevier BV",
number = "2",
}