Phase relations in the Nd-Ba-Cu-O system in reduced oxygen atmospheres

S. Banzai; G. Osabe; N. Sakai; M. Otsuka; M. Murakami

doi:10.1088/0953-2048/13/6/301

Phase relations in the Nd-Ba-Cu-O system in reduced oxygen atmospheres

S. Banzai, G. Osabe, N. Sakai, M. Otsuka, M. Murakami

Research output: Contribution to journal › Conference article › peer-review

8 Citations (Scopus)

Abstract

We have studied the quasi-binary phase diagrams along the line connecting NdBa₂Cu₃O_y and BaCuO_2+w in reduced oxygen atmospheres: p(O₂) = 10^-3 and 10^-2 atm. The nucleation and melt of NdBa₂Cu₃O_y (Nd123) in Ba-rich solvent were observed in situ using a laser scanning microscope in 1% O₂ + Ar and 0.1% O₂ + Ar. The liquidus and solidus lines of nearly stoichiometric Nd123 have been constructed. We have found that phase relations are quite different between 1% O₂ + Ar and 0.1% O₂ + Ar. In a 0.1% O₂ + Ar environment BaCuO_2+w undergoes incongruent melting. (BaCuO_2+w → Ba₂CuO₃₊₂ + L → BaO + L) and Nd422 decomposes into the Nd₂O₃ phase.

Original language	English
Pages (from-to)	633-636
Number of pages	4
Journal	Superconductor Science and Technology
Volume	13
Issue number	6
DOIs	https://doi.org/10.1088/0953-2048/13/6/301
Publication status	Published - 2000 Jun 1
Externally published	Yes
Event	The 2nd International Workshop on the Processing and Applications of Superconducting (RE)CBO Large Grain Materials - Morioka, Jpn Duration: 1999 Oct 19 → 1999 Oct 22

ASJC Scopus subject areas

Ceramics and Composites
Condensed Matter Physics
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

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@article{e24616f32cb24be083eaf856b5fe2785,

title = "Phase relations in the Nd-Ba-Cu-O system in reduced oxygen atmospheres",

abstract = "We have studied the quasi-binary phase diagrams along the line connecting NdBa2Cu3Oy and BaCuO2+w in reduced oxygen atmospheres: p(O2) = 10-3 and 10-2 atm. The nucleation and melt of NdBa2Cu3Oy (Nd123) in Ba-rich solvent were observed in situ using a laser scanning microscope in 1% O2 + Ar and 0.1% O2 + Ar. The liquidus and solidus lines of nearly stoichiometric Nd123 have been constructed. We have found that phase relations are quite different between 1% O2 + Ar and 0.1% O2 + Ar. In a 0.1% O2 + Ar environment BaCuO2+w undergoes incongruent melting. (BaCuO2+w → Ba2CuO3+2 + L → BaO + L) and Nd422 decomposes into the Nd2O3 phase.",

author = "S. Banzai and G. Osabe and N. Sakai and M. Otsuka and M. Murakami",

year = "2000",

month = jun,

day = "1",

doi = "10.1088/0953-2048/13/6/301",

language = "English",

volume = "13",

pages = "633--636",

journal = "Superconductor Science and Technology",

issn = "0953-2048",

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number = "6",

note = "The 2nd International Workshop on the Processing and Applications of Superconducting (RE)CBO Large Grain Materials ; Conference date: 19-10-1999 Through 22-10-1999",

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TY - JOUR

T1 - Phase relations in the Nd-Ba-Cu-O system in reduced oxygen atmospheres

AU - Banzai, S.

AU - Osabe, G.

AU - Sakai, N.

AU - Otsuka, M.

AU - Murakami, M.

PY - 2000/6/1

Y1 - 2000/6/1

N2 - We have studied the quasi-binary phase diagrams along the line connecting NdBa2Cu3Oy and BaCuO2+w in reduced oxygen atmospheres: p(O2) = 10-3 and 10-2 atm. The nucleation and melt of NdBa2Cu3Oy (Nd123) in Ba-rich solvent were observed in situ using a laser scanning microscope in 1% O2 + Ar and 0.1% O2 + Ar. The liquidus and solidus lines of nearly stoichiometric Nd123 have been constructed. We have found that phase relations are quite different between 1% O2 + Ar and 0.1% O2 + Ar. In a 0.1% O2 + Ar environment BaCuO2+w undergoes incongruent melting. (BaCuO2+w → Ba2CuO3+2 + L → BaO + L) and Nd422 decomposes into the Nd2O3 phase.

AB - We have studied the quasi-binary phase diagrams along the line connecting NdBa2Cu3Oy and BaCuO2+w in reduced oxygen atmospheres: p(O2) = 10-3 and 10-2 atm. The nucleation and melt of NdBa2Cu3Oy (Nd123) in Ba-rich solvent were observed in situ using a laser scanning microscope in 1% O2 + Ar and 0.1% O2 + Ar. The liquidus and solidus lines of nearly stoichiometric Nd123 have been constructed. We have found that phase relations are quite different between 1% O2 + Ar and 0.1% O2 + Ar. In a 0.1% O2 + Ar environment BaCuO2+w undergoes incongruent melting. (BaCuO2+w → Ba2CuO3+2 + L → BaO + L) and Nd422 decomposes into the Nd2O3 phase.

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U2 - 10.1088/0953-2048/13/6/301

DO - 10.1088/0953-2048/13/6/301

M3 - Conference article

AN - SCOPUS:0033686431

SN - 0953-2048

VL - 13

SP - 633

EP - 636

JO - Superconductor Science and Technology

JF - Superconductor Science and Technology

IS - 6

T2 - The 2nd International Workshop on the Processing and Applications of Superconducting (RE)CBO Large Grain Materials

Y2 - 19 October 1999 through 22 October 1999

ER -

Phase relations in the Nd-Ba-Cu-O system in reduced oxygen atmospheres

Abstract

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