Phase Decomposition of YBa2Cu3Ox and Behavior of Y2O3 at High Temperatures

Shigeoki Saji, Shinichi Abe, Toshio Shibayanagi, Shigenori Hori, Seiichi Kawaguchi

Research output: Contribution to journalArticlepeer-review

Abstract

YBa2Cu3Ox superconductors prepared by the sinter method were heated for various times at temperatures from 1273 to 2241 K in alumina, platinum and iridium crucibles, and then their contents were press-quenched between two copper plates. Phases formed in the press-quenched samples were indentified by means of SEM, EPMA and X-ray diffractometry. YBa2Cu3Ox. decomposed into Y2BaCuO5. BaCuO2 and an unknown phase at 1293 K. BaCuO2 was unstable at higher temperatures than 1373 K. Y2BaCuO5 decomposed into Y2O3 and a liquid phase at 1423 K and Y2O3 was stable in the temperature range from 1423 to 2241 K. Iridium crucible was most useful for the heat treatment of the Y-Ba-Cu-O system at the high temperatures.

Original languageEnglish
Pages (from-to)317-321
Number of pages5
JournalMaterials Transactions, JIM
Volume31
Issue number4
DOIs
StatePublished - 1990

Keywords

  • YBaCuO
  • iridium crucible
  • molten oxide
  • phase decomposition microstructure
  • superconductor

ASJC Scopus subject areas

  • General Engineering

Fingerprint

Dive into the research topics of 'Phase Decomposition of YBa2Cu3Ox and Behavior of Y2O3 at High Temperatures'. Together they form a unique fingerprint.

Cite this