公开(公告)号：JPH107456A

公开(公告)日：1998-01-13

申请号：JP4760997

申请日：1997-03-03

Applicant: IBM

Inventor： BEYERS ROBERT B ,  ENGLER EDWARD M ,  GRANT PAUL M ,  LIM GRACE S ,  PARKIN STUART S P

IPC: C01G1/00 ,  C01G3/00 ,  C04B35/00 ,  C04B35/45 ,  H01B12/00 ,  H01B13/00 ,  H01L39/12 ,  H01L39/24

Abstract: PROBLEM TO BE SOLVED: To produce a superconductive material substantially manifesting a single phase bulk superconductivity at a temperature not less than 77 deg.K and to provide the method for producing the superconductive material. SOLUTION: This superconductive material has a perovskite crystal structure, is represented by A1 ±x M2 ±x Cu3 Oy [A is a combination of Y, Lu, Sc or Yb or Y; M is a combination of Ba, Sr or Ca or Ba; (x) is within the range of 0

公开(公告)号：MX167372B

公开(公告)日：1993-03-19

申请号：MX1054288

申请日：1988-02-24

Applicant: IBM

Inventor： LIM GRACE S ,  PARKIN STUART S P ,  BEYERS ROBERT B ,  ENGLER EDWARD M ,  GRANT PAUL M

IPC: C01G1/00 ,  C01G3/00 ,  C04B35/00 ,  C04B35/45 ,  H01B12/00 ,  H01B13/00 ,  H01L39/12 ,  H01L39/24 ,  H03B15/00

Abstract: Compositions having the formula A1+/-xM2+/-xCu3Oy, wherein A is Y, or a combination of Y La, Lu, Sc or Yb; M is Ba, or a combination of Ba, Sr or Ca and y is sufficient to satisfy the valence demands, have been found to be bulk electrical superconductors at a temperature above 77K. The compositions are single phase perovskite-like crystalline structures. They are made by a process involving intimately mixing the metal oxides or their precursors in the proper molar ratios, heating the mixture in the presence of oxygen to a temperature between about 800 DEG C and about 1100 DEG C and slowly cooling the mixture to room temperature in the presence of oxygen over a period of at least four hours.

公开(公告)号：AU601553B2

公开(公告)日：1990-09-13

申请号：AU1278388

申请日：1988-03-08

Applicant: IBM

Inventor： BEYERS ROBERT B ,  ENGLER EDWARD M ,  GRANT PAUL M ,  LIM GRACE S ,  PARKIN STUART S P

IPC: C01G1/00 ,  C01G3/00 ,  C04B35/00 ,  C04B35/45 ,  H01B12/00 ,  H01B13/00 ,  H01L39/12 ,  H01L39/24 ,  C01G3/02 ,  C01G57/00 ,  C04B35/50

Abstract: Compositions having the formula A1+/-xM2+/-xCu3Oy, wherein A is Y, or a combination of Y La, Lu, Sc or Yb; M is Ba, or a combination of Ba, Sr or Ca and y is sufficient to satisfy the valence demands, have been found to be bulk electrical superconductors at a temperature above 77K. The compositions are single phase perovskite-like crystalline structures. They are made by a process involving intimately mixing the metal oxides or their precursors in the proper molar ratios, heating the mixture in the presence of oxygen to a temperature between about 800 DEG C and about 1100 DEG C and slowly cooling the mixture to room temperature in the presence of oxygen over a period of at least four hours.

公开(公告)号：CA1341623C

公开(公告)日：2011-10-11

申请号：CA558109

申请日：1988-02-04

Applicant: IBM

Inventor： BEYERS ROBERT B ,  ENGLER EDWARD M ,  GRANT PAUL M ,  LIM GRACE S ,  PARKIN STUART S P

IPC: C01G1/00 ,  C01G3/00 ,  C04B35/00 ,  C04B35/45 ,  H01B12/00 ,  H01B13/00 ,  H01L39/12 ,  H01L39/24

Abstract: Compositions having the formula A1 x m 2 x Cu3Oy, wherein A is Y, or a combination of Y, La, Lu, Sc or Yb; M is Ba, or a combination of Ba, Sr or Ca and y is sufficient to satisfy the valence demands, have been found to be bulk electrical superconductors at a temperature above 77°K. The compositions are single phase perovskite-like crystalline structures. They are made by a process involving intimately mixing the metal oxides or their precursors in the proper molar ratios, heating the mixture in the presence of oxygen to a temperature between about 800°C and about 1100°C and slowly cooling the mixture to room temperature in the presence of oxygen over a period of at least four hours.

公开(公告)号：AU1278388A

公开(公告)日：1988-09-15

申请号：AU1278388

申请日：1988-03-08

Applicant: IBM

Inventor： BEYERS ROBERT B ,  ENGLER EDWARD M ,  GRANT PAUL M ,  LIM GRACE S ,  PARKIN STUART S P

IPC: C01G1/00 ,  C01G3/00 ,  C04B35/00 ,  C04B35/45 ,  H01B12/00 ,  H01B13/00 ,  H01L39/12 ,  H01L39/24 ,  C01G3/02 ,  C01G57/00

Abstract: Compositions having the formula A1+/-xM2+/-xCu3Oy, wherein A is Y, or a combination of Y La, Lu, Sc or Yb; M is Ba, or a combination of Ba, Sr or Ca and y is sufficient to satisfy the valence demands, have been found to be bulk electrical superconductors at a temperature above 77K. The compositions are single phase perovskite-like crystalline structures. They are made by a process involving intimately mixing the metal oxides or their precursors in the proper molar ratios, heating the mixture in the presence of oxygen to a temperature between about 800 DEG C and about 1100 DEG C and slowly cooling the mixture to room temperature in the presence of oxygen over a period of at least four hours.