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11. 发明授权

US5206215A Process for obtaining precursors for high critical temperature superconductor ceramics comprising a first and second precipitation 失效
标题翻译：用于获得包括第一次和第二次降解的高临界温度超导体陶瓷前驱体的工艺
公开(公告)号：US5206215A
公开(公告)日：1993-04-27
申请号：US850926
申请日：1992-03-13
申请人： Gerard Duperray , Francoise Ducatel
发明人： Gerard Duperray , Francoise Ducatel
IPC分类号： C04B35/45 , C01B13/36 , C01G1/00 , C01G3/00 , C01G29/00 , C01G30/00 , H01B12/00 , H01B13/00
CPC分类号： C01G30/002 , C01G29/006 , C01G3/006 , C01P2002/50 , Y10S505/738
摘要： A process for obtaining precursors for high critical temperature superconductor ceramics by precipitating salts which are insoluble in water comprises the following stages: A starting solution of soluble salts is prepared in which the cations are in the stoichiometric proportions of the required superconductor phase. A first full precipitation is carried out of a first series of cations at a first value of pH. The first precipitates obtained is filtered out and washed and the filtrate is retained. The pH of the filtrate is changed to a second value and the residual cations are precipitated. The second precipitate is filtered. The first and second precipitates are homogenized. The product obtained is dried, calcined, and ground.
摘要翻译：用于通过沉淀不溶于水的盐来获得高临界温度超导体陶瓷的前体的方法包括以下阶段：制备可溶性盐的起始溶液，其中阳离子是所需超导体相的化学计量比例。在第一个pH值下，由第一系列阳离子进行第一次全部沉淀。将得到的第一沉淀物过滤并洗涤并保留滤液。将滤液的pH值变更为第二值，残留的阳离子沉淀。过滤第二沉淀物。将第一和第二沉淀物均化。将得到的产物干燥，煅烧和研磨。

12. 发明授权

US5100871A Method for preparing rare earth-barium-cuprate pre-ceramic resins and superconductive materials prepared therefrom 失效
标题翻译：制备稀土 - 钡 - 铜酸盐预陶瓷树脂和由其制备的超导材料的方法
公开(公告)号：US5100871A
公开(公告)日：1992-03-31
申请号：US441955
申请日：1989-11-28
申请人： Kuo-Chun Chen , Khodabakhsh S. Mazdiyasni
发明人： Kuo-Chun Chen , Khodabakhsh S. Mazdiyasni
IPC分类号： C01G3/00 , C04B35/45 , H01L39/24
CPC分类号： H01L39/2425 , C01G3/006 , C04B35/4508 , C01P2002/34 , C01P2002/76 , Y10S505/734 , Y10S505/735 , Y10S505/738 , Y10S505/74
摘要： A method of making high T.sub.c 1-2-3 superconductors having perovskite structure using solution techniques is disclosed. The process uses two solvent system to form a resinous pre-ceramic material having a controlled viscosity for facilitating its formation into superconducting articles such as fibers, wires, ribbons, films and the like. The process yields a pre-ceramic which is flexible and which has sufficient structural integrity to withstand normal handling.
摘要翻译：公开了一种使用溶液技术制造具有钙钛矿结构的高Tc 1-2-3超导体的方法。该方法使用两种溶剂体系形成具有受控粘度的树脂预陶瓷材料，以便于其形成超导物品如纤维，电线，带，膜等。该方法产生一种柔性的预陶瓷，其具有足够的结构完整性以承受正常的处理。

13. 发明授权

US5077265A Co-precipitation synthesis of precursors to bismuth-containing superconductors 失效
标题翻译：含铋超导体的前体的共沉淀合成
公开(公告)号：US5077265A
公开(公告)日：1991-12-31
申请号：US622155
申请日：1990-11-30
申请人： Joseph J. Ritter
发明人： Joseph J. Ritter
IPC分类号： C01B13/18 , C01G29/00 , C04B35/45
CPC分类号： C01G29/006 , C01B13/185 , C04B35/45 , C01P2006/32 , C01P2006/40 , C01P2006/42 , C01P2006/60 , Y10S505/738
摘要： A co-precipitation synthesis of precursors to bismuth-containing ceramic superconducting materials is disclosed in which bismuth and at least one other approrpiate metal are dissolved in a non-aqueous acidic solvent, which are then recovered as a homogeneous dry powder. The mixed metal salts are co-precipitated from aqueous solution in the form of the corresponding homogeneous hydroxycarbonate precursor mixture by reaction with either sodium carbonate or potassium carbonate. The homogeneous precursor may be then converted to the BiCuSrCuO.sub.x ceramic by calcining the mixed hydroxycarbonate to a powder, compressing said powder into a green compact, sintering said green compact at a temperature of at least 750.degree. C., and cooling the ceramic material so produced at a controlled rate, preferably about 50.degree. C./minute.
摘要翻译：公开了含铋陶瓷超导材料的前体的共沉淀合成法，其中将铋和至少一种其它邻接金属溶解在非水性酸性溶剂中，然后将其作为均匀的干燥粉末回收。通过与碳酸钠或碳酸钾反应，将混合的金属盐以相应的均匀羟基碳酸酯前体混合物的形式从水溶液中共沉淀。然后将均匀前体转化成BiCuSrCuOx陶瓷，通过将混合的羟基碳酸酯煅烧成粉末，将所述粉末压制成生坯，在至少750℃的温度下烧结所述生坯，并冷却如此生产的陶瓷材料优选约50℃/分钟。

14. 发明授权

US5061683A Process for making superconductors using barium hydroxide 失效
标题翻译：使用氢氧化钡制造超导体的工艺
公开(公告)号：US5061683A
公开(公告)日：1991-10-29
申请号：US197961
申请日：1988-05-31
申请人： Harold S. Horowitz
发明人： Harold S. Horowitz
IPC分类号： C04B35/00 , C01F1/00 , C01G1/00 , C01G1/02 , C01G3/00 , C01G3/02 , C04B35/45 , C04B35/50 , H01B12/00 , H01B13/00 , H01L39/00 , H01L39/12 , H01L39/24
CPC分类号： H01L39/2419 , C01G3/006 , C04B35/4504 , C04B35/4512 , C04B35/4521 , C01P2002/72 , C01P2002/76 , C01P2004/61 , C01P2004/62 , Y10S505/734 , Y10S505/737 , Y10S505/738
摘要： There is disclosed an improved process for preparing a superconducting composition having the formula M.sub.w A.sub.z Cu.sub.v O.sub.x wherein M is selected from the group consisting if Bi, Tl, Y, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm Yb and Lu; A is at least one alkaline earth metal selected from the group consisting of Ba, Ca and Sr; x is at least 6; w is at least 1; z is at least 2 and v is at least 1; said composition having a superconducting transition temperature of above 77 K, preferably above about 90 K; said process consisting essentially of (a) forming a suspension having an M:A:Cu atomic ratio of w:z:v by mixing A(OH).sub.2, AO or AO.sub.2 and M.sub.2 O.sub.3 with an aqueous solution of cupric carboxylate or cupric nitrate at a temperature from about 50.degree. C. to about 100.degree. C., or mixing A(OH).sub.2 with an aqueous solution of Cu carboxylate, nitrate or a mixture thereof and M carboxylate, nitrate or a mixture thereof at a temperature from about 50.degree. C. to about 100.degree. C.; (b) drying the suspension formed in step (a) to obtain a precursor powder; and (c) heating and cooling the powder under specified conditions to form the desired superconducting composition. Shaped articles thereof are also disclosed.
摘要翻译：公开了一种制备具有式MwAzCuvOx的超导组合物的改进方法，其中M选自Bi，Tl，Y，Nd，Sm，Eu，Gd，Dy，Ho，Er，Tm Yb和Lu中的一种; A是选自Ba，Ca和Sr中的至少一种碱土金属; x至少为6; w至少为1; z至少为2，v为至少1; 所述组合物的超导转变温度高于77K，优选高于约90K; 所述方法基本上由（a）通过将A（OH）2，AO或AO 2和M 2 O 3与羧酸铜或硝酸铜的水溶液混合在一起而形成具有M:A:Cu原子比为w:z:v的悬浮液。温度为约50℃至约100℃，或在约50℃的温度下将A（OH）2与Cu羧酸盐，硝酸盐或其混合物的水溶液和M羧酸盐，硝酸盐或其混合物混合 C.至约100℃。（b）干燥步骤（a）中形成的悬浮液以获得前体粉末; 和（c）在特定条件下加热和冷却粉末以形成所需的超导组合物。其形状也被公开。

15. 发明授权

US4956340A Process for preparing compound metal oxides of yttrium, barium and copper 失效
标题翻译：制备钇，钡和铜复合金属氧化物的方法
公开(公告)号：US4956340A
公开(公告)日：1990-09-11
申请号：US432316
申请日：1989-11-03
申请人： Etsuji Kimura , Nozomu Hasegawa , Yutaka Nishiyama
发明人： Etsuji Kimura , Nozomu Hasegawa , Yutaka Nishiyama
IPC分类号： C01G1/00 , C01G3/00 , C04B35/45 , H01B12/00 , H01L39/24
CPC分类号： C04B35/4504 , C01G3/006 , H01L39/2419 , Y10S505/735 , Y10S505/737 , Y10S505/738 , Y10S505/78
摘要： A process for preparing compound metal oxides, superconductive compound oxides, is disclosed. The process comprises preparing an aqueous solution containing a predetermined content ratio of chloride, nitrate or acetate of a rare earth metal, an alkaline earth metal and copper, said content ration corresponding to the composition of the object compound metal oxide, adjusting the pH of the solution to 1.5-2.0, adding oxalic acid in an amount such that the concentration of the residual oxalic acid becomes 0.05 M/l-0.1 M/l, collecting the thus formed precipitate and firing it.

16. 发明授权

US5152973A Synthesis of submicron powders under reduced oxygen pressure 失效
标题翻译：在降低氧气压力的条件下合成亚磷酸钙
公开(公告)号：US5152973A
公开(公告)日：1992-10-06
申请号：US520695
申请日：1990-05-08
申请人： Nicholas D. Spencer
发明人： Nicholas D. Spencer
IPC分类号： B01J2/04 , C01B13/14 , C01B13/18 , C01B32/60 , C01G1/00 , C01G3/00
CPC分类号： C01G3/006 , C01B13/185 , C01P2004/51 , C01P2004/61 , C01P2006/12 , Y10S505/737 , Y10S505/738
摘要： The invention process provides a metal oxide, or oxides of more than one more metal, wherein the oxides have a mean particle size less than 1 micron. The oxides are made by steps including (1) reacting an aqueous solution of a metal salt (or salts) that form insoluble carbonate(s), thereby to form a carbonate precipitate, followed by (b) recovering the precipitate, e.g., by filtration; (c) redispersing the precipitate in water to form a second very dilute slurry; (d) spray-drying said second slurry; (e) calcining the spray-dried product at a low temperature (e.g., 540.degree. C.), followed by a final calcination in atmosphere consisting of flowing oxygen initially under reduced pressure (e.g., 2 Torr). The spray-dried spheroids comprise particles having a mean particle size less than one micron, a property carried over into the products of both calcinations.

17. 发明授权

US5122510A Method for preparing rare earth-barium-cuprate pre-ceramic resins and superconductive materials prepared therefrom 失效
标题翻译：制备稀土金属 - 预制陶瓷树脂的方法及其制备的超导材料
公开(公告)号：US5122510A
公开(公告)日：1992-06-16
申请号：US605564
申请日：1990-10-29
申请人： Kuo-Chun Chen , Khodabakhsh S. Mazdiyasni
发明人： Kuo-Chun Chen , Khodabakhsh S. Mazdiyasni
IPC分类号： C01G3/00 , C04B35/45 , H01L39/24
CPC分类号： H01L39/2425 , C01G3/006 , C04B35/4508 , C01P2002/34 , C01P2002/76 , Y10S505/734 , Y10S505/735 , Y10S505/738 , Y10S505/74
摘要： A method of making high T.sub.c 1-2-3 superconductors having perovskite structure using solution techniques is disclosed. The process uses two solvent systems to form a resinous preceramic material having a controlled viscosity for facilitating its formation into superconducting articles such as fibers, wires, ribbons, films and the like. The process yields a pre-ceramic which is flexible and which has sufficient structural integrity to withstand normal handling.

18. 发明授权

US5028585A Superconducting oxide FCC oxide composite compositions and method of making such compositions 失效
标题翻译：超导氧化物FCC氧化物复合组合物及其制备方法
公开(公告)号：US5028585A
公开(公告)日：1991-07-02
申请号：US194058
申请日：1988-05-13
申请人： Nicholas D. Spencer
发明人： Nicholas D. Spencer
IPC分类号： C04B35/00 , C01G1/00 , C01G3/00 , C01G5/00 , C01G7/00 , C01G29/00 , C04B35/45 , H01B12/00 , H01L39/12 , H01L39/24
CPC分类号： C01G3/006 , C01G29/006 , C01G5/006 , C01G7/006 , C04B35/4504 , C04B35/4521 , H01L39/125 , H01L39/126 , H01L39/2419 , H01L39/247 , C01P2002/50 , C01P2002/72 , C01P2002/74 , C01P2002/77 , C01P2004/03 , C01P2004/61 , C01P2006/32 , C01P2006/40 , Y10S505/738 , Y10S505/785
摘要： Two or more superconductors are reacted together to form a non-superconducting phase encapsulating a residual superconducting phase. For example YBa.sub.2 Cu.sub.3 oxide is reacted with Bi.sub.2 Sr.sub.2 CaCu.sub.2 oxide to form a superconducting product containing a novel non-superconducting oxide of Y, Bi, and Ba. A superconducting YBa.sub.2 Cu.sub.3 oxide remains as an interconnected phase throughout the product. The new non-superconducting phase largely encapsulates and insulates the superconducting phase.
摘要翻译：两个或更多个超导体一起反应以形成封装剩余超导相的非超导相。例如，YBa2Cu3氧化物与Bi2Sr2CaCu2氧化物反应形成含有Y，Bi，Ba的新型非超导氧化物的超导体。超导YBa2Cu3氧化物在整个产品中保持为互连相。新的非超导阶段主要封装并绝缘超导相。

19. 发明授权

US5019555A High purity superconducting compositions and methods for their fabrication 失效
标题翻译：高纯度超导组合物及其制造方法
公开(公告)号：US5019555A
公开(公告)日：1991-05-28
申请号：US230788
申请日：1988-08-10
申请人： Jack Chin , Samuel S. Liang
发明人： Jack Chin , Samuel S. Liang
IPC分类号： C04B35/622 , C01G1/00 , C01G3/00 , C04B35/45 , H01L39/24
CPC分类号： C04B35/4508 , C01G3/006 , H01L39/2477 , C01P2002/76 , Y10S505/738
摘要： The present invention is related to a composition and methods for producing highly pure, high temperature superconducting materials having the general formula MBa.sub.2 Cu.sub.3 O.sub.7-x, where M is yttrium or a rare earth element and x is from 0 to 0.5. The superconducting material is produced by first obtaining a solution of yttrium or rare earth element and copper. Next a solution of barium is obtained. The two solutions are heated and mixed together forming a precursor precipitate of the superconducting material. Subsequently, in one embodiment of the invention, the precipitate is recovered, calcined, sintered and slow cooled in oxygen or air. This produces a material having a desirable orthorhomic structure which is superconductive at high temperatures.Because no organic solvents are used and no pH control other than the amount of barium in the solution is employed, it is possible to provide a highly pure superconducting material.

20. 发明授权

US5011822A Preparation of a uniform mixed metal oxide and superconductive oxides 失效
标题翻译：制备均匀的混合金属氧化物和超导氧化物
公开(公告)号：US5011822A
公开(公告)日：1991-04-30
申请号：US296267
申请日：1989-01-10
申请人： Timothy J. Barder
发明人： Timothy J. Barder
IPC分类号： C01B13/18 , C01B13/32 , C01G1/00 , C01G3/00
CPC分类号： C01B13/185 , C01B13/32 , C01G3/006 , C01P2002/72 , C01P2002/88 , C01P2006/40 , Y10S502/525 , Y10S505/738 , Y10S505/742 , Y10S505/778 , Y10S505/779 , Y10S505/78 , Y10S505/781
摘要： A method for producing uniform mixed metal oxides, such as superconducting mixtures including Y.sub.1 Ba.sub.2 Cu.sub.3 O.sub.7-x, in which such metals are precipitated as their oxalates from alcoholic solutions of the metals as the salts of a carboxylic acid.
摘要翻译：制备均匀的混合金属氧化物的方法，例如包括Y1Ba2Cu3O7-x的超导混合物，其中这些金属作为它们的草酸盐从作为羧酸的盐的金属的醇溶液中沉淀出来。

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