发明授权
- 专利标题： Bismuth-containing superconducting material and process for producing it
- 专利标题（中）： 含铋超导材料及其生产工艺
-
申请号： US839324申请日： 1992-02-20
-
公开(公告)号： US5250509A公开(公告)日： 1993-10-05
- 发明人: Bernhard Hettich , Peter Majewski , Klaus Schulze, deceased , Gunter Petzow
- 申请人： Bernhard Hettich , Peter Majewski , Klaus Schulze, deceased , Gunter Petzow
- 申请人地址： DEX Frankfurt
- 专利权人： Hoechst Aktiengesellschaft
- 当前专利权人： Hoechst Aktiengesellschaft
- 当前专利权人地址： DEX Frankfurt
- 优先权： DEX4108869 19910319
- 主分类号： C01G1/00
- IPC分类号： C01G1/00 ; C01G29/00 ; C04B35/00 ; C04B35/45 ; H01B12/00 ; H01B13/00 ; H01L39/12 ; H01L39/24 ; C01F11/02 ; C01G3/02
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
公开/授权文献
- US5802190A Linear speaker array 公开/授权日：1998-09-01