Tape-shaped oxide superconductor
US8431515B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | May 7, 2008 |
| Grant date | Apr 30, 2013 |
| Priority date | — |
| Expiry date | Dec 13, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N60/0632
Abstract
A tape-shaped oxide superconductor includes a 15 to 100 nm-thick Ce—Gd—O-based oxide layer (Ce:Gd=40:60 to 70:30 molar ratio) and a 100 nm-thick Ce—Zr—O-based oxide layer (Ce:Zr=50:50 molar ratio) as first and second intermediate layers are formed by MOD on an Ni-base alloy substrate having a half value width (FWHM:Δφ) of 6.5 degrees. A 150 nm-thick CeO2 oxide layer as a third intermediate layer is formed on the second intermediate layer by RF sputtering. A 1 μm-thick YBCO superconducting layer is formed by TFA-MOD on the three-layer structure. In the tape-shaped oxide superconductor, the Δφ values of the first to third intermediate layers are (6.0 to 6.5) degrees, (6.0 to 6.6) degrees, and (6.0 to 6.6) degrees, respectively, and the Jc value of the YBCO superconducting layer in liquid nitrogen is 1.8 to 2.2 MA/cm2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.