发明申请
- 专利标题: Bismuth oxide superconducting wire rod and process for producing the same
- 专利标题(中): 氧化铋超导线材及其制造方法
-
申请号: US10531703申请日: 2004-06-14
-
公开(公告)号: US20050278939A1公开(公告)日: 2005-12-22
- 发明人: Naoki Ayai
- 申请人: Naoki Ayai
- 专利权人: Sumitomo Electric Industries, Ltd.
- 当前专利权人: Sumitomo Electric Industries, Ltd.
- 优先权: JP2003-183474 20030626
- 国际申请: PCT/JP04/08668 WO 20040614
- 主分类号: H01L39/24
- IPC分类号: H01L39/24 ; H01B1/00
摘要:
The present invention provides a method of manufacturing a bismuth based oxide superconducting wire, comprising steps of preparing a raw material powder, and subjecting the raw material powder to plastic working and heat treatment; wherein the raw material powder contains the superconducting phases containing Bi, Pb, Sr, Ca, Cu, and O in a composition ratio of approximately 2:2:1:2 (Bi+Pb):Sr:Ca:Cu, and the non-superconducting phases containing Pb; wherein the composition ratio (Bi+Pb):Sr:Ca:Cu of the raw material powder is approximately 2:2:2:3; and wherein the ratio of the non-superconducting phases to the superconducting phases is 5 wt % or less; or wherein the raw material powder contains orthorhombic superconducting phases containing Bi, Pb, Sr, Ca, Cu, and 0 in a composition ratio of approximately 2:2:1:2 (Bi+Pb):Sr:Ca:Cu; and wherein the composition ratio (Bi+Pb):Sr:Ca:Cu of the raw material powder is approximately 2:2:2:3.