| 摘要 |
PURPOSE:To obtain a superconducting material having high safety without using a highly poisonous material, to obtain a superconducting material having characteristics easy to control and easily convertible into a single-phase material, to provide a superconducting material which causes no sudden escape of oxygen even at high temp. and hardly undergoes deterioration in the characteristics and to provide a superconducting material which hardly undergoes deterioration in the characteristics even in the presence of water and steam. CONSTITUTION:This metal oxide material has a compsn. represented by a formula LnaCebSrcCu3-xMxOy, wherein 4.3<a+b+c<5.3, 1.4<b<2.5, 1.7<c<2.3, 0.04(x<0.5, Ln is one or more kinds of elements or an atomic group selected among Y and lanthanoids, and M is one or more kinds of elements or an atomic group selected among Mo, W and Re. |
