发明授权
US5019553A Sr.sub.2 (Bi.sub.1-a Pba).sub.x Cu.sub.y O.sub.z metal oxide material 失效
Sr2(Bi1-aPba)xCuyOz金属氧化物材料

Sr.sub.2 (Bi.sub.1-a Pba).sub.x Cu.sub.y O.sub.z metal oxide material
摘要:
A metal oxide material is provided which is represented by the composition formula:A.sub.2 B.sub.x Cu.sub.y O.sub.zwherein 2.ltoreq.x.ltoreq.3.5, 2.ltoreq.y.ltoreq.3.5, x+y>4, and 4
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