| 高铅掺氟Bi系超导体的研制 |
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| 引用本文： | 李洁,高孝恢,高赛.高铅掺氟Bi系超导体的研制[J].中南大学学报(自然科学版),1993(6). |
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| 作者姓名： | 李洁 高孝恢 高赛 |
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| 作者单位： | 中南工业大学，中南工业大学，吉林大学 长沙，410083，长沙，410083 |
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| 基金项目： | 国家“863”高技术研究计划基金 |
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| 摘 要： | 本文首次报道了五种高铅量Bi系超导体Bi_(2-n)Pb_nSr_2Ca_2Cu_3O_(y-x)F_x(n=1.0,1.2,1.4,1.6,1.7)的制备,x在1.0～1.4的范围内,n依次取上述值时。超导体的T_(co)分别为113.6K,112K,104K,88K,78K。X射线粉末衍射,红外光谱等分析表明,n=1.0～1.4时超导体仍具有2223相结构特征;n=1.6,1.7时表现出新的结构特点,此外从化学动力学观点初步探讨了CuF_2,PbO在超导相形成过程中的作用。
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| 关 键 词： | 化学动力学 活化能垒 掺氟Bi系超导体 |
STUDY ON THE PREPARATION OF F-DOPED Bi-SYSTEM SUPERCONDUCTORS WITH HIGH CONTENT OF LEAD |
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| Li Jie,Gao Xiaohui,Cao Sai.STUDY ON THE PREPARATION OF F-DOPED Bi-SYSTEM SUPERCONDUCTORS WITH HIGH CONTENT OF LEAD[J].Journal of Central South University:Science and Technology,1993(6). |
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| Authors: | Li Jie Gao Xiaohui Cao Sai |
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| Institution: | Li Jie,Gao Xiaohui,Cao Sai Department of Chemistry,Central South University of Technology,Changsha,410083,China Jilin University |
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| Abstract: | Five kinds of superconductors were directly synthesized with CuF_2 substituting parts of
CuO. According to the nominal composition Bi_(2-n)Pb_nSr_2Ca_2Cu_3O_(y-x)F_y, as n was equal to
1.0, 1.2, 1.4, 1.6, 1.7, and x ranged from 1.0 to 1.4, T_(co) of samples were 113.6 K, 112
K, 104 K, 88 K, and 78 K respectively. The result of X-ray powder diffraction, infrared
spectra showed that superconductors with Pb amount equal to 1.0, 1.2, 1.4 still kept 2223
superconductive structure and they exhibited new structural features as Pb amount equaled
1.6, 1.7. The effect of CuF_2 and PbO on the formation of super conducting phase were stud-
ied based on chemical kinetics. |
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| Keywords: | F-doped Bi (Pb)-system superconductors chemical kinetics potential barrier |
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