Morphology and composition changes of the Pt-based secondary phase in melt-grown YBCO caused by Al pollution

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Published 10 January 2002 • Published under licence by IOP Publishing Ltd
, , Citation P Diko et al 2002 Supercond. Sci. Technol. 15 217 DOI 10.1088/0953-2048/15/2/306

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1 Institute of Solid State and Materials Research Dresden, PO Box 270016, 01171 Dresden, Germany

2 Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 04353 Kosice, Slovakia

Dates

  1. Received 23 March 2001
  2. Published

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0953-2048/15/2/217

Abstract

The morphological and compositional changes of the Pt-based phase in melt-grown Y-Ba-Cu-O samples grown on the Al2O3 substrate were studied. It was shown that Al dissoluted in the melt is effectively consumed by the Pt-based phase, by replacing Cu with Al until it becomes fully converted to the Pt, Al-based phase. Al substitution changes irregular shape of Pt-based particles into Pt, Al-based crystals with well-developed habits. Ag addition hinders Al diffusion into the Y-Ba-Cu-O sample during melt processing.

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10.1088/0953-2048/15/2/306