Tracer diffusion of 110Ag in YBa2Cu3O7-δ

Tracer diffusion of 110Ag in YBa2Cu3O7−δ has been measured in the temperature range 800–950 °C using serial sectioning. The polycrystalline samples were made either from a powder containing about 0.2% Zr prepared by a conventional technique, or from a purer powder that had been calcined in low-press...

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Bibliographic Details
Published in:Journal of applied physics 1990-09, Vol.68 (5), p.2523-2525
Main Authors: NAN CHEN, ROTHMAN, S. J, ROUTBORT, J. L
Format: Article
Language:English
Subjects:
Chemical interdiffusion
diffusion barriers
Condensed matter: structure, mechanical and thermal properties
Diffusion in solids
Exact sciences and technology
Physics
Transport properties of condensed matter (nonelectronic)
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Summary:Tracer diffusion of 110Ag in YBa2Cu3O7−δ has been measured in the temperature range 800–950 °C using serial sectioning. The polycrystalline samples were made either from a powder containing about 0.2% Zr prepared by a conventional technique, or from a purer powder that had been calcined in low-pressure oxygen. Concentration profiles indicate both a volume and a fast diffusivity path contribution to diffusion. The activation energies were 227±3 and 249±17 kJ/mole for samples made from powder calcined in low-pressure oxygen and conventional powder, respectively. Diffusion was slower in the samples made from the purer powder.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.346472