公开(公告)号：US5250509A

公开(公告)日：1993-10-05

申请号：US839324

申请日：1992-02-20

申请人： Bernhard Hettich ,  Peter Majewski ,  Klaus Schulze, deceased ,  Gunter Petzow

发明人： Bernhard Hettich ,  Peter Majewski ,  Klaus Schulze, deceased ,  Gunter Petzow

IPC分类号： C01G1/00 ,  C01G29/00 ,  C04B35/00 ,  C04B35/45 ,  H01B12/00 ,  H01B13/00 ,  H01L39/12 ,  H01L39/24 ,  C01F11/02 ,  C01G3/02

CPC分类号： C04B35/4521 ,  H01L39/126 ,  Y10S505/782

摘要： The invention relates to an oxide-ceramic superconducting material which contains bismuth, strontium, calcium and copper, having an overall composition of Bi.sub.y Ca.sub.2 Sr.sub.2 Cu.sub.3 O.sub.x, where y is an integer from 2.35 to 2.6 and x is about 10 to 12. The material has a critical temperature T above 105 K and has a proportion of the phase Bi.sub.2 Sr.sub.2 Ca.sub.2 Cu.sub.3 O.sub.x of at least 85% by volume. The invention also relates to a process for producing a bismuth-containing superconducting material which comprises holding the oxides or oxide precursors of bismuth, strontium, calcium and copper at a temperature in the range from 850.degree. to 890.degree. C. over a time span of a plurality of hours and adhering to the following atomic ratios:Bi:Cu>2:3Ca:Sr=0.9 to 1.50.SIGMA.(Sr+Ca):Cu=4.2:3 to 4:3.33Bi:.SIGMA.(Sr+Ca)=2.35:4 to 3.1:4

摘要翻译： 本发明涉及含有铋，锶，钙和铜的氧化物 - 陶瓷超导材料，其总体组成为BiyCa2Sr2Cu3Ox，其中y为2.35至2.6的整数，x为约10至12.材料具有临界温度 T高于105K，并且Bi2Sr2Ca2Cu3Ox相的比例至少为85体积％。 本发明还涉及一种生产含铋的超导材料的方法，其包括在850℃至890℃的温度范围内保持铋，锶，钙和铜的氧化物或氧化物前体，时间跨度为 Cu：Sr = 0.9〜1.50，SIGMA（Sr + Ca）：Cu = 4.2：3〜4：3.33 Bi：SIGMA（Sr + Ca） = 2.35：4〜3.1：4