Direct observation of melting and solidification of Bi1.8Pb0.4Sr1.9Ca2.1Cu3.5Ox in various oxygen atmospheresby high temperature optical microscopy

• Lu, X. Y.

• Nagata, A.

• Sugawara, K.

• Kamada, S.

• Lu, Xiaoye

抄録

The melting and solidification processes of the Bi1.8Pb0.4Sr1.9Ca2.1Cu3.5Ox in various oxygen atmospheres have been observed in situ using a high temperature optical microscopy. In the melting process, the samples began to melt at 788℃ in N2, 862℃ in 8％O2+N2, 880℃ in air, 895℃ in O2. Many dark needle-like crystals (Sr,Ca)2CuO3 and the white bar-like crystals (Sr,Ca)CuO2 appeared in the liquid phase. When the temperature was raised, (Sr,Ca)CuO2 first melted and then (Sr,Ca)2CuO3 melted peritectically ((Sr,Ca)2CuO3 →CaO+L). In the solidification process, two peritectic reactions CaO+L→(Sr,Ca)2CuO3 and (Sr,Ca)2CuO3 + L→Bi-2212 were observed in the atmospheres of air, 8％O2+N2, and O2, whereas in N2, only a reaction of L→ Bi-2201 was observed.

収録刊行物

• Physica C

  Physica C 354 (1-4), 313-320, 2001-05-01

  Elsevier

キーワード

• Bi-superconductor
• Oxygen
• Melting
• Solidification
• Microstructure

詳細情報

• CRID: 1050282677538749440
• NII論文ID: 120000798900
• NII書誌ID: AA11536733
• ISSN: 09214534
• HANDLE: 10295/440
• Web Site: https://air.repo.nii.ac.jp/records/710
• 本文言語コード: en
• 資料種別: journal article
• データソース種別:
  • IRDB
  • CiNii Articles