Structure and oxygen storage/release capacities of Dy$_{1-x}$Y$_{x}$MnO$_{3+\delta }$ (0 $\le $ x $\le $ 1)

ORAL

Abstract

Synthesis, oxygen storage/release capacities (OSC), oxygen absorption/desorption rates, and structural properties of Dy$_{1-x}$Y$_{x}$MnO$_{3+\delta }$ (0 $\le $ x $\le $ 1) have been studied by x-ray and neutron powder diffraction, dilatometry, and thermogravimetric analysis. These materials have been found to have excellent reversible OSC at low-temperatures of 200 - 375\r{ }C and various oxygen partial-pressures, making them potential candidates for oxygen sorbents in novel gas separation methods such as thermal swing absorption and thermal-automatic recovery processes. The OSC of the Dy$_{1-x}$Y$_{x}$MnO$_{3+\delta }$ system relies on the difference in oxygen content of a reversible phase transitions between hexagonal P63cm ($\delta $ = 0) and a previously unreported stable phases of this system (0 $<$ $\delta \quad <\quad 0.5)$ and pyrochlore Fd3m [$\delta $ = 0.50, Subramanian \textit{et al.} J. Solid State Chem. \textbf{72,} 24 (1988)].

Authors

  • S. Remsen

    Department of Physics, Northern Illinois University, DeKalb, IL 60115

  • B. Dabrowski

    MSD, Argonne National Laboratory, and Physics, Northern Illinois University, De Kalb IL, USA, Physics Department, Northern Illinois University, DeKalb, IL 60115, Physics Department, Northern Illinois University, DeKalb, IL 60115 and Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, Department of Physics, Northern Illinois University, DeKalb, IL and Materials Science Division, Argonne National Laboratory, Argonne, IL, Northern Illinois University, Physics Department, Northern Illinois University, DeKalb IL 60115, Department of Physics, Northern Illinois University, DeKalb, IL 60115

  • O. Chmaissem

    MSD, Argonne National Laboratory, and Physics, Northern Illinois University, De Kalb IL, USA, Physics Department, Northern Illinois University, DeKalb, IL 60115, Physics Department, Northern Illinois University, DeKalb, IL 60115 and Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, Department of Physics, Northern Illinois University, DeKalb, IL and Materials Science Division, Argonne National Laboratory, Argonne, IL, Department of Physics, Northern Illinois University, DeKalb, IL 60115

  • S. Kolesnik

    Physics Department, Northern Illinois University, DeKalb, IL 60115, Department of Physics, Northern Illinois University, DeKalb, IL and Materials Science Division, Argonne National Laboratory, Argonne, IL, Physics Department, Northern Illinois University, DeKalb IL 60115, Department of Physics, Northern Illinois University, DeKalb, IL 60115

  • J. Mais

    Physics Department, Northern Illinois University, DeKalb, IL 60115, Department of Physics, Northern Illinois University, DeKalb, IL 60115