| 摘要 |
PURPOSE:To obtain a small-sized practical coil or solenoid which employs a composite oxide material by composing it of a ceramic substrate in which an at least one composite oxide superconducting material supported on a green sheet and disposed in an annular state and/or spirally is integrally sintered. CONSTITUTION:It is composed of a ceramic substrate 1 in which a green sheet and an at least one composite oxide superconducting material 2 supported on the green sheet and disposed in a ring state and/or spirally are integrally sintered and the material 2. The material 2 contains at least one element contained in a formula (alpha1-xbetax)gammayOz (the alpha is at least one element contained in group IIa elements, the beta is at least one element contained in group IIIa elements, the theta is at least one element contained in group lb, IIb, IIIb, IVa or VIIIa elements, and x, y and z are numerals which satisfy x=0.1-0.9, y=1.0-4.0, 1<=z<=5.). |
