New structural phase transition in Bi$_{2}$(Fe$_{4-x}$Mn$_{x}$)O$_{10-x}$ complex oxides and it implications in the mullite family of materials

ORAL

Abstract

Complex oxides with the mullite crystal structure belong to the most important phase in both traditional (porcelains and alumino silicate refractories) and advanced ceramics (heat exchangers, shock resistant composites, optical devices). New complex oxides in the mullite family Bi$_{2}$(Fe$_{4-x}$Mn$_{x})$O$_{10-x}$ were synthesized and characterized. Using synchrotron x-ray diffraction we demonstrate a new structural phase transition in Bi$_{2}$(Fe$_{4-x}$Mn$_{x})$O$_{10-x}$ induced by pressure. We contrast it with the structural stability for mullite senso stricto Al$_{4+2x}$Si$_{2-2x}$O$_{10-x}$ where we did not observe any phase transition.

*DOE-NNSA DE-FC08-01NV14049. DOE-BES, DOE-NNSA, NSF, DOD -TACOM, the W.M. Keck Found. DOE-BES, W-31-109-ENG-38

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Authors

  • Patricia Kalita

    • HiPSEC \& Dept. of Physics and Astronomy, University of Nevada Las Vegas, Las Vegas, NV, USA

  • Andrew Cornelius

    • HiPSEC \& Dept. of Physics and Astronomy, University of Nevada Las Vegas, Las Vegas, NV, USA

  • Stanislav Sinogeikin

    • Geophysical Lab., Carnegie Institution of Washington, Washington, DC, USA

  • Kristina Lipinska

    • Harry Reid Center for Environmental Studies, University of Nevada Las Vegas, NV, USA

  • Oliver Hemmers

    • Harry Reid Center for Environmental Studies, University of Nevada Las Vegas, NV, USA

  • Michael Lufaso

    • Dept. of Chemistry, University of North Florida, Jacksonville, FL, USA

  • Zachary Kann

    • Dept. of Chemistry, University of North Florida, Jacksonville, FL, USA

  • Hartmut Schneider

    • Inst. of Crystallography, University of Koeln, Koeln, Germany