Actions for Oxygen Transport Ceramic Membranes [electronic resource].

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Oxygen Transport Ceramic Membranes [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2004.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Additional Creators
University of Alaska Anchorage, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
The present quarterly report describes some of the investigations on the structural properties of dense OTM bars provided by Praxair and initial studies on newer composition of Ti doped LSF. Dense OTM bars provided by Praxair were loaded to fracture at varying stress rates. Studies were done at room temperature in air and at 1000 C in a specified environment to evaluate slow crack growth behavior. In addition, studies were also begun to obtain reliable estimates of fracture toughness and stable crack growth in specific environments. Newer composition of Ti doped LSF membranes were characterized by neutron diffraction analysis. Quench studies indicated an apparent correlation between the unit cell volume and oxygen occupancy. The studies however, indicated an anomaly of increasing Fe/Ti ratio with change in heat treatment. Ti doped LSF was also characterized for stoichiometry as a function of temp and pO₂. The non stoichiometry parameter δ was observed to increase almost linearly on lowering pO₂ until a ideal stoichiometric composition of δ = 0.175 was approached.
Report Numbers
E 1.99:883054
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Note
Published through SciTech Connect.
02/01/2004.
H.U. Anderson; X.-D Zhou; S. Bandopadhyay; W.B. Yelon; C.A. Mims; N. Nagabhushana; Alan Jacobson.
Type of Report and Period Covered Note
Quarterly;
Funding Information
FC26-99FT40054
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