Refinement of Nd-422 phase trapped in a Nd1+δBa2-δCu3O7-γ superconducting matrix

F. Frangi; S. I. Yoo; N. Sakai; M. Murakami

Refinement of Nd-422 phase trapped in a Nd_1+δBa_2-δCu₃O_7-γ superconducting matrix

F. Frangi, S. I. Yoo, N. Sakai, M. Murakami

Research output: Contribution to journal › Article › peer-review

Abstract

The possibility of controlling Nd-422 phase dimension and morphology, both in the partially melted state and in the final superconducting matrix, was investigated. Nd-Ba-Cu-O samples were prepared by the melt powder melt growth (MPMG) technique. Precursor materials containing Nd as either Nd₂O₃ or Nd-422, formed during precursor quenching, were used. The role of Pt in Nd-422 refining was analyzed. The effect on Nd-422 nucleation and growth, of stoichiometries with increasing Nd-422 molar excesses (0%, 10%, 20%, and 40%) combined with different heating processes, up to the partially melted state, were examined. Uniformly distributed needle-like particles (1 μm diameter and 10-15 μm length) were obtained at 1120°C and resulted in a further refined distribution trapped in completely processed samples.

Original language	English
Pages (from-to)	1990-2001
Number of pages	12
Journal	Journal of Materials Research
Volume	12
Issue number	8
Publication status	Published - 1997 Aug 1
Externally published	Yes

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Cite this

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title = "Refinement of Nd-422 phase trapped in a Nd1+δBa2-δCu3O7-γ superconducting matrix",

abstract = "The possibility of controlling Nd-422 phase dimension and morphology, both in the partially melted state and in the final superconducting matrix, was investigated. Nd-Ba-Cu-O samples were prepared by the melt powder melt growth (MPMG) technique. Precursor materials containing Nd as either Nd2O3 or Nd-422, formed during precursor quenching, were used. The role of Pt in Nd-422 refining was analyzed. The effect on Nd-422 nucleation and growth, of stoichiometries with increasing Nd-422 molar excesses (0%, 10%, 20%, and 40%) combined with different heating processes, up to the partially melted state, were examined. Uniformly distributed needle-like particles (1 μm diameter and 10-15 μm length) were obtained at 1120°C and resulted in a further refined distribution trapped in completely processed samples.",

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T1 - Refinement of Nd-422 phase trapped in a Nd1+δBa2-δCu3O7-γ superconducting matrix

AU - Frangi, F.

AU - Yoo, S. I.

AU - Sakai, N.

AU - Murakami, M.

PY - 1997/8/1

Y1 - 1997/8/1

N2 - The possibility of controlling Nd-422 phase dimension and morphology, both in the partially melted state and in the final superconducting matrix, was investigated. Nd-Ba-Cu-O samples were prepared by the melt powder melt growth (MPMG) technique. Precursor materials containing Nd as either Nd2O3 or Nd-422, formed during precursor quenching, were used. The role of Pt in Nd-422 refining was analyzed. The effect on Nd-422 nucleation and growth, of stoichiometries with increasing Nd-422 molar excesses (0%, 10%, 20%, and 40%) combined with different heating processes, up to the partially melted state, were examined. Uniformly distributed needle-like particles (1 μm diameter and 10-15 μm length) were obtained at 1120°C and resulted in a further refined distribution trapped in completely processed samples.

AB - The possibility of controlling Nd-422 phase dimension and morphology, both in the partially melted state and in the final superconducting matrix, was investigated. Nd-Ba-Cu-O samples were prepared by the melt powder melt growth (MPMG) technique. Precursor materials containing Nd as either Nd2O3 or Nd-422, formed during precursor quenching, were used. The role of Pt in Nd-422 refining was analyzed. The effect on Nd-422 nucleation and growth, of stoichiometries with increasing Nd-422 molar excesses (0%, 10%, 20%, and 40%) combined with different heating processes, up to the partially melted state, were examined. Uniformly distributed needle-like particles (1 μm diameter and 10-15 μm length) were obtained at 1120°C and resulted in a further refined distribution trapped in completely processed samples.

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Refinement of Nd-422 phase trapped in a Nd_1+δBa_2-δCu₃O_7-γ superconducting matrix

Abstract

ASJC Scopus subject areas

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