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1. 发明授权

US4956336A Oriented grained Y-Ba-Cu-O superconductors having high critical currents and method for producing same 失效
标题翻译：具有高临界电流的定向晶粒Y-Ba-Cu-O超导体及其制造方法
公开(公告)号：US4956336A
公开(公告)日：1990-09-11
申请号：US309382
申请日：1989-02-10
申请人： Kamel Salama , Venkatakrishnan Selvamanickam
发明人： Kamel Salama , Venkatakrishnan Selvamanickam
IPC分类号： C01G1/00 , C01G3/00 , C04B35/00 , C04B35/45 , C04B35/653 , H01L39/24
CPC分类号： C04B35/4508 , C04B35/653 , H01L39/2419 , Y10S505/742
摘要： A superconductor material having a current density, J, of from about 30,000 to about 85,000 amps/cm.sup.2 at zero magnetic field and 77.degree. K. is disclosed. The 123 superconductor is of the formula L.sub.1 Ba.sub.2 Cu.sub.3 O.sub.6 +.delta. wherein L is preferably yttrium. The process comprises compacting the solid state reaction product of L.sub.1 Ba.sub.2 Cu.sub.3 O and then sintering the reaction product at a temperature between about 40.degree. C. to about 90.degree. C. below its melting point, i.e., for Y.sub.1 Ba.sub.2 Cu.sub.3 O.sub.6 +.delta. at a temperature of approximately 940.degree. C. The composition is then heated in a preheated chamber maintained at approximately 1090.degree. C. to about 1,200.degree. C. (approximately 1,100.degree. C. for Y.sub.1 Ba.sub.2 Cu.sub.3 O.sub.6 +.delta.) until it has been decomposed, and is then rapidly cooled to a temperature between about 10.degree. C. to about 30.degree. C. above its melting point, i.e. for Y.sub.1 Ba.sub.2 Cu.sub.3 O.sub.6 +.delta. a temperature of 1030.degree. C. and then is control cooled at a rate of 1.degree. C./hr until it reaches a temperature of about 20.degree. C. to about 40.degree. C. below its melting point, i.e., for Y.sub.1 Ba.sub.2 Cu.sub.3 O.sub.6 +.delta. a temperature of 980.degree. C. The composition is steadily held at this temperature for at least eight hours, and then cooled to a temperature of approximately 400.degree. C. below its melting point (for Y.sub.1 Ba.sub.2 Cu.sub.3 O.sub.6 +.delta. approximately a temperature of 600.degree. C.). The material is then slowly cooled by another 200.degree. C. and is then annealed in oxygen.
摘要翻译：公开了在零磁场和77°K下具有约30,000至约85,000安培/ cm 2的电流密度J的超导体材料。 123超导体具有式L1Ba2Cu3O6 +δ，其中L优选为钇。该方法包括压实L1Ba2Cu3O的固态反应产物，然后在低于其熔点的约40℃至约90℃的温度下烧结反应产物，即在约940℃的温度下对于Y1Ba2Cu3O6 +δ 然后将组合物在保持在约1090℃至约1200℃（对于Y1Ba2Cu3O6 +δ1约为1100℃）的预热室中加热直到其被分解，然后迅速冷却至约10℃ 在其熔点以上约30℃，即对于Y1Ba2Cu3O6 +δ，温度为1030℃，然后以1℃/小时的速度控制冷却至达到约20℃的温度至低于其熔点约40℃，即对于Y1Ba2Cu3O6 +δ，温度为980℃。该组合物在该温度下稳定保持至少8小时，然后冷却至约400℃的温度。低于它的融化（对于Y1Ba2Cu3O6 +δ大约温度为600℃）。然后将材料缓慢冷却另外200℃，然后在氧气中退火。

2. 发明授权

US5306697A Oriented grained Y-Ba-Cu-O superconductors having high critical currents and method for producing same 失效
标题翻译：具有高临界电流的定向晶粒Y-Ba-Cu-O超导体及其制造方法
公开(公告)号：US5306697A
公开(公告)日：1994-04-26
申请号：US753012
申请日：1991-08-23
申请人： Kamel Salama , Venkatakrishnan Selvamanickam
发明人： Kamel Salama , Venkatakrishnan Selvamanickam
IPC分类号： C04B35/45 , C04B35/653 , H01L39/24 , C01F11/02 , C01F17/00 , C01G3/02 , H01L39/12
CPC分类号： H01L39/2419 , C04B35/4508 , C04B35/653 , Y10S505/742 , Y10S505/778 , Y10S505/779 , Y10S505/78 , Y10S505/785
摘要： A superconductor material having a current density, J, of from about 30,000 to about 85,000 amps/cm.sup.2 at zero magnetic field and 77.degree. K. is disclosed. The 123 superconductor, of the formula L.sub.1 Ba.sub.2 Cu.sub.3 O.sub.6 +.delta. wherein L is preferably yttrium, is capable of entrapping sufficiently high magnetic fields and exhibits a low microwave surface resistance. The process of preparing the superconductor comprises compacting the bulk product, L.sub.1 Ba.sub.2 Cu.sub.3 O, and then sintering the reaction product at a temperature between about 40.degree. C. to about 90.degree. C. below its melting point, i.e., for Y.sub.1 Ba.sub.2 Cu.sub.3 O.sub.6 +.delta. at a temperature of approximately 940.degree. C. The composition is then heated in a preheated chamber maintained at approximately 1090.degree. C. to about 1,200.degree. C. (approximately 1,100.degree. C. for Y.sub.1 Ba.sub.2 Cu.sub.3 O.sub.6 +.delta.) until it has been decomposed, and is then rapidly cooled to a temperature between about 10.degree. C. to about 30.degree. C. above its melting point, i.e. for Y.sub.1 Ba.sub.2 Cu.sub.3 O.sub. 6 +.delta. a temperature of 1030.degree. C., and then is controlled cooled at a rate of 1.degree. C./hr until it reaches a temperature of about 20.degree. C. to about 40.degree. C. below its melting point, i.e., for Y.sub.1 Ba.sub.2 Cu.sub.3 O.sub.6 +.delta. a temperature of 980.degree. C. The composition is steadily held at this temperature for at least eight hours, and then cooled to a temperature of approximately 400.degree. C. below its melting point (for Y.sub.1 Ba.sub.2 Cu.sub.3 O.sub.6 +.delta. approximately a temperature of 600.degree. C). The material is then slowly cooled by another 200.degree. C. and is then annealed in oxygen.
摘要翻译：公开了在零磁场和77度K下具有约30,000至约85,000安培/平方厘米的电流密度J的超导体材料。其中L优选为钇的式L1Ba2Cu3O6 +（delta）的123超导体能够捕获足够高的磁场并表现出低的微波表面电阻。制备超导体的方法包括压制本体产物L1Ba2CuO3，然后在低于其熔点的温度为约40℃至约90℃之间的温度下烧结反应产物，即在温度为Y1Ba2Cu3O6 +（delta）的温度下然后将组合物在保持在约1090摄氏度至约1,200摄氏度的预热室中加热（对于Y1Ba2Cu3O6 +（delta）约为1100摄氏度），直至其分解，然后快速冷却至高于其熔点约10摄氏度至约30摄氏度的温度，即对于Y1Ba2Cu3O6 +（δ），温度为1030摄氏度，然后以1摄氏度的速率冷却。 / hr，直到其温度低于其熔点约20摄氏度至约40摄氏度，即对于Y1Ba2Cu3O6 +（δ），温度为980摄氏度。该组合物在该温度下稳定保持至少8℃ 小时，a 然后冷却至低于其熔点（对于大约温度为600摄氏度的Y1Ba2Cu3O6 +（Δ））约400摄氏度的温度）。然后将材料缓慢冷却另外200摄氏度，然后在氧气中退火。

3. 发明授权

US5462917A Process of preparing superconductive oxide complexes containing L, Ba, Cu and O and method of using the same 失效
标题翻译：制备含有L，Ba，Cu和O的超导氧化物络合物的方法及其使用方法
公开(公告)号：US5462917A
公开(公告)日：1995-10-31
申请号：US194941
申请日：1994-02-14
申请人： Kamel Salama , Venkatakrishnan Selvamanickam
发明人： Kamel Salama , Venkatakrishnan Selvamanickam
IPC分类号： C04B35/45 , C04B35/653 , H01L39/24 , H01L39/12 , C01F11/02 , H01B12/16
CPC分类号： H01L39/2419 , C04B35/4508 , C04B35/653 , Y10S505/742 , Y10S505/778 , Y10S505/779 , Y10S505/78 , Y10S505/785
摘要： A superconductor material having a current density, J, of from about 30,000 to about 85,000 amps/cm.sup.2 at zero magnetic field and 77.degree. K is disclosed. The 123 superconductor, of the formula L.sub.1 Ba.sub.2 Cu.sub.3 O.sub.6 +.delta. wherein L is preferably yttrium, is capable of entrapping sufficiently high magnetic fields and exhibits a low microwave surface resistance. The process of preparing the superconductor comprises compacting the bulk product, L.sub.1 Ba.sub.2 Cu.sub.3 O, and then sintering the reaction product at a temperature between about 40.degree. C. to about 90.degree. C. below its melting point, i.e., for Y.sub.1 Ba.sub.2 Cu.sub.3 O.sub.6 +.delta. at a temperature of approximately 940.degree. C. The composition is then heated in a preheated chamber maintained at approximately 1090.degree. C. to about 1,200.degree. C. (approximately 1,100.degree. C. for Y.sub.1 Ba.sub.2 Cu.sub.3 O.sub.6 +.delta.) until it has been decomposed, and is then rapidly cooled to a temperature between about 10.degree. C. to about 30.degree. C. above its melting point, i.e. for Y.sub.1 Ba.sub.2 Cu.sub.3 O.sub. 6 +.delta. a temperature of 1030.degree. C., and then is controlled cooled at a rate of 1.degree. C./hr until it reaches a temperature of about 20.degree. C. to about 40.degree. C. below its melting point, i.e., for Y.sub.1 Ba.sub.2 Cu.sub.3 O.sub.6 +.delta. a temperature of 980.degree. C. The composition is steadily held at this temperature for at least eight hours, and then cooled to a temperature of approximately 400.degree. C. below its melting point (for Y.sub.1 Ba.sub.2 Cu.sub.3 O.sub.6 +.delta. approximately a temperature of 600.degree. C.). The material is then slowly cooled by another 200.degree. C. and is then annealed in oxygen.
摘要翻译：公开了在零磁场和77°K下具有约30,000至约85,000安培/ cm 2的电流密度J的超导体材料。其中L优选为钇的式L1Ba2Cu3O6 +δ的123超导体能够捕获足够高的磁场并表现出低的微波表面电阻。制备超导体的过程包括压制大块产品L1Ba2Cu3O，然后在低于其熔点的约40℃至约90℃之间的温度下烧结反应产物，即在大约温度下对于Y1Ba2Cu3O6 +δ 然后将组合物在保持在约1090℃至约1200℃（对于Y1Ba2Cu3O6 +δ1约为1100℃）的预热室中加热直到其被分解，然后迅速冷却至温度在其熔点之上约10℃至约30℃，即对于Y1Ba2Cu3O6 +δ，温度为1030℃，然后以1℃/小时的速率控制冷却至达到温度低于其熔点约20℃至约40℃，即对于Y1Ba2Cu3O6 +δ，温度为980℃。将该组合物在该温度下稳定保持至少8小时，然后冷却至温度约400 DE 低于其熔点（对于Y1Ba2Cu3O6 +δ约为600℃的温度）。然后将材料缓慢冷却另外200℃，然后在氧气中退火。

4. 发明授权

US5439879A Method for joining superconductor segments to form a superconducting article 失效
标题翻译：用于连接超导体部分以形成超导制品的方法
公开(公告)号：US5439879A
公开(公告)日：1995-08-08
申请号：US85453
申请日：1993-06-30
申请人： Kamel Salama , Venkatakrishnan Selvamanickam
发明人： Kamel Salama , Venkatakrishnan Selvamanickam
IPC分类号： C30B29/22 , H01B12/02 , H01B13/00 , H01L39/02 , H01R43/00 , H01L39/12
CPC分类号： H01L39/02
摘要： A method of fabricating articles from segments of anisotropically conducting 123 superconductor such that the current transport properties of the article are comparable to those of the individual segments. The segments to be joined are examined to determine the orientation of the ab plane. Contact surfaces are formed where necessary and the segments are brought into contact and the ab planes are brought into parallel alignment. The contacted segments are elevated in temperature and static pressure is applied to accelerate reaction across the interface of the contact surfaces. The so-formed coherent article is then cooled at a controlled rate.
摘要翻译：一种从各向异性导电的123超导体的片段制造制品的方法，使得制品的当前传输性能与单个片段的当前传输性能相当。检查待连接的片段以确定ab平面的取向。在必要时形成接触表面，并且使片段接触并且使ab平面平行排列。接触的部分在温度上升高，施加静压以加速穿过接触表面的界面的反应。然后将如此形成的粘结制品以受控的速度冷却。

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