| 摘要 |
<p>A metal oxide material is provided which is represented by the compositional formula: Bi2(Sr1-xCax)3+nCu2+nO(12+3n)- delta wherein 0 < x < 1, 0 < n </= 10, and 0 < delta . The metal oxide may be represented by the compositional formula: (Bi1-xA<I>x)2(SryCa 1-y-z-A<II>z)p (Cu1-rA<III>r)qO delta wherein 0 </= x </= 0.5, 0.3 </= y </= 0.7, 0 </= z </= 0.5, 0 </= r </= 0.1, 1 < Y+z, 2 </= p </= 11, 1 </= q </= 10 and 5.4 </= delta </= 24; A<I>is an element selected from Groups IIIb, IVb and Vb; A<II> is an element selected from Groups Ia, IIa and IVb; and A<III> is an element selected from Groups IVa, Va, VIa and VIII. The metal oxide may further comprise an element selected from lanthanoids and yttrium. The metal oxide material shows superconductivity at a temperature not lower than the boiling point of liquid helium.</p> |
| 申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
AKIMITSU, JUN;DEN, TORU;KISHI, FUMIO;KANEKO, NORIO;AKAIKE, MASATAKE;NIIZUMA, KIYOZUMI;TANAKA, ATSUKO |
