OXYGEN TRANSPORT CERAMIC MEMBRANES

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Description

In the present quarter, oxygen transport perovskite ceramic membranes are evaluated for strength and fracture in oxygen gradient conditions. Oxygen gradients are created in tubular membranes by insulating the inner surface from the reducing environment by platinum foils. Fracture in these test conditions is observed to have a gradient in trans and inter-granular fracture as opposed to pure trans-granular fracture observed in homogeneous conditions. Fracture gradients are reasoned to be due to oxygen gradient set up in the membrane, variation in stoichiometry across the thickness and due to varying decomposition of the parent perovskite. The studies are useful in predicting ... continued below

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20 pages

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Bandopadhyay, Dr. Sukumar & Nagabhushana, Dr. Nagendra July 1, 2002.

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Description

In the present quarter, oxygen transport perovskite ceramic membranes are evaluated for strength and fracture in oxygen gradient conditions. Oxygen gradients are created in tubular membranes by insulating the inner surface from the reducing environment by platinum foils. Fracture in these test conditions is observed to have a gradient in trans and inter-granular fracture as opposed to pure trans-granular fracture observed in homogeneous conditions. Fracture gradients are reasoned to be due to oxygen gradient set up in the membrane, variation in stoichiometry across the thickness and due to varying decomposition of the parent perovskite. The studies are useful in predicting fracture criterion in actual reactor conditions and in understanding the initial evolution of fracture processes.

Physical Description

20 pages

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OSTI as DE00803193

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  • Other Information: PBD: 1 Jul 2002

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  • Report No.: FC26-99FT40054--09
  • Grant Number: FC26-99FT40054
  • DOI: 10.2172/803193 | External Link
  • Office of Scientific & Technical Information Report Number: 803193
  • Archival Resource Key: ark:/67531/metadc737031

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  • July 1, 2002

Added to The UNT Digital Library

  • Oct. 19, 2015, 7:39 p.m.

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  • March 29, 2016, 8:28 p.m.

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Bandopadhyay, Dr. Sukumar & Nagabhushana, Dr. Nagendra. OXYGEN TRANSPORT CERAMIC MEMBRANES, report, July 1, 2002; Pittsburgh, Pennsylvania. (digital.library.unt.edu/ark:/67531/metadc737031/: accessed August 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.