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| La1+zBa2-zCu3Oy相的形成、固溶度及La对Ba的替代 | |
| 引用本文： | 周晓敬,胥江河,朱世富,赵北君,陶丰,车广灿. La1+zBa2-zCu3Oy相的形成、固溶度及La对Ba的替代[J]. 四川大学学报(自然科学版), 1999, 36(5): 886-891 |
| 作者姓名： | 周晓敬 胥江河 朱世富 赵北君 陶丰 车广灿 |
| 作者单位： | 1. 北京理工大学,北京,100080 2. 渝州大学,重庆,630000 3. 四川大学,成都,610064 4. 中科院物理所 |
| 摘 要： | 对Ｌａ１＋ｚＢａ２－ｚＣｕ３Ｏｙ相的形成，固溶度和Ｌａ对Ｂａ的替代进行了系统研究，以期获得制备具有更高Ｔｃ的超导体的最佳条件。表明Ｌａ１＋ｚＢａ２－ｚＣｕ３Ｏｙ在空气中固溶度为０．２０－０．７０，Ｎ２中为０。在空气中合成Ｌａ１＋ｚＢａ２－ｚＣｕ３Ｏｙ时，Ｌａ能替代Ｂａ，但Ｂａ并不能替代Ｌａ，空气和Ｏ２有利于Ｌａ对Ｂａ的替代，但当在Ｎ２中合成Ｌａ１＋ｚＢａ２－ｚＣｕ３Ｏｙ时，Ｌａ对Ｂａ的替代受到抑制 |
| 关 键 词： | 相形成 固溶度 替代物 |
The Phase Formation,Solid Solution Range and Substitution of La for Ba of La1+zBa2-zCu3Oy |
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| ZHOU Xiao-jin,XU Jiang-he,ZHU Shi-fu,ZHAO Bei-jun,TAO Feng,CHE Guang-can. The Phase Formation,Solid Solution Range and Substitution of La for Ba of La1+zBa2-zCu3Oy[J]. Journal of Sichuan University (Natural Science Edition), 1999, 36(5): 886-891 | |
| Authors: | ZHOU Xiao-jin XU Jiang-he ZHU Shi-fu ZHAO Bei-jun TAO Feng CHE Guang-can |
| Abstract: | The phase formation,solid solution range and the substitution of La for Ba of La1+zBa2-zCu3Oy are investigated systematically for obtaining and understanding the optimum condition for preparing La123 superconductor with higher Tc.The solid solution range of La1+zBa2-zCu3Oy are z=0.20～0.70 in air and z=0 in N2.La can substitute for Ba,but Ba can not for La in La1+zBa2-zCu3Oy in air or O2.Atmosphere of O2 or air is favorable for the substitution of La for Ba.The substitution is suppressed when La1+zBa2-zCu3Oy are sintered and cooled in N2.It is found that sintering and cooling procedure in N2 atmosphere is one key procedure to prepare single phase high-quality La123 superconductor with higher Tc. |
| Keywords: | phase formation solid solution range substitution form |
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