TY - JOUR
T1 - High-entropy, phase-constrained, lanthanide sesquioxide
AU - Tseng, Kuo Pin
AU - Yang, Qun
AU - McCormack, Scott J.
AU - Kriven, Waltraud M.
N1 - This research used resources of the Advanced Photon Source, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. The synchrotron experiments were completed at Beamline 33-BM-C and 11-BM-B, with the assistance of Dr. Jenia (Evguenia) Karapetrova and Dr. Saul Lapidus. The authors are grateful to Dr. Richard T. Haasch, Dr. Waclaw Swiech and Dr. Ankita Bhutani who supported XPS, 2010 Lab6 TEM and MPM3 SQUID experiments at the Frederick Seitz Materials Research Laboratory Central Research Facilities at the University of Illinois at Urbana-Champaign. The STEM-EDS experiments were supported by the Centre for High-resolution Electron Microscopy (CħEM) of SPST at ShanghaiTech University under the grant no. EM02161943. The authors specially thank the members in the Kriven Research Group—Andrew Steveson, Daniel Ribero-Rodriguez and Ben Hulbert for their help with carrying out the beamline experiments. Kuo-Pin Tseng acknowledges support from the Technologies Incubation Scholarship from the Taiwan Ministry of Education. Special thanks to Keanetech LLC, IL for partially supporting this research.
PY - 2020/1/1
Y1 - 2020/1/1
N2 - Oxides can experience structural transformations resulting from variations in cation oxidation states or coordination geometry upon thermal treatment. Whether such structural distortions can affect the stability of high-entropy oxides has not been studied. In this research, a new, high-entropy, lanthanide sesquioxide, Gd0.4Tb0.4Dy0.4Ho0.4Er0.4O3 solid solution having a single phase, cubic-bixbyite structure was synthesized, with no phase transformation from room temperature to 1650°C. The phase stability was examined via both in situ and ex situ, high-temperature, synchrotron, X-ray powder diffraction. This high-entropy oxide could inhibit the phase transformations occurring in constituent monocation sesquioxides, Tb2O3 and Gd2O3, via random arrangement of multications.
AB - Oxides can experience structural transformations resulting from variations in cation oxidation states or coordination geometry upon thermal treatment. Whether such structural distortions can affect the stability of high-entropy oxides has not been studied. In this research, a new, high-entropy, lanthanide sesquioxide, Gd0.4Tb0.4Dy0.4Ho0.4Er0.4O3 solid solution having a single phase, cubic-bixbyite structure was synthesized, with no phase transformation from room temperature to 1650°C. The phase stability was examined via both in situ and ex situ, high-temperature, synchrotron, X-ray powder diffraction. This high-entropy oxide could inhibit the phase transformations occurring in constituent monocation sesquioxides, Tb2O3 and Gd2O3, via random arrangement of multications.
KW - high-entropy oxides
KW - phase transformations
KW - rare-earth oxides
KW - synchrotron X-ray methods
UR - https://www.scopus.com/pages/publications/85069925955
UR - https://www.scopus.com/pages/publications/85069925955#tab=citedBy
U2 - 10.1111/jace.16689
DO - 10.1111/jace.16689
M3 - Article
AN - SCOPUS:85069925955
SN - 0002-7820
VL - 103
SP - 569
EP - 576
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
IS - 1
ER -