| 粉末熔化法(YHo)Ba2Cu3O7-y超导体的性能与微结构 |
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| 引用本文： | 冯勇,周廉. 粉末熔化法(YHo)Ba2Cu3O7-y超导体的性能与微结构[J]. 物理学报, 1992, 41(11): 1880-1883 |
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| 作者姓名： | 冯勇 周廉 |
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| 作者单位： | 西北有色金属研究院,宝鸡721014 |
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| 基金项目： | 国家超导技术联合研究开发中心资助的课题;中国科学院超导办公室资助的课题 |
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| 摘 要： | 采用粉末熔化工艺(PMP)制备了高Jc的(YHo)Ba2Cu3O7-y差热分析结果表明,添加Ho可以改变Y系超导体的熔化温度。在YBa2Cu3O7-y中加部分Ho替代Y可以提高体系的Jc,减小样品中211相的平均直径,并且微结构得到改善,在211粒子周围存在大量的晶体缺陷,这些晶体缺陷可能是有效的钉扎中心。关键词：
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| 收稿时间： | 1991-12-03 |
PROPERTIES AND MICROSTRUCTURES OF MELT PROCES-SED (YHo)Ba2Cu3O7-y SUPERCONDUCTOR |
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| FENG YONG and ZHOU LIAN. PROPERTIES AND MICROSTRUCTURES OF MELT PROCES-SED (YHo)Ba2Cu3O7-y SUPERCONDUCTOR[J]. Acta Physica Sinica, 1992, 41(11): 1880-1883 |
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| Authors: | FENG YONG and ZHOU LIAN |
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| Abstract: | We have prepared (YHo) Ba2Cu3O7-y superconductors with hige Jc value by powder melting process (PMP) method. The DTA result shows that the melting temperature of Y-system superconductor can be reduced by Ho addition. The Jc value can be improved and the size of 211 phase can be reduced by Ho substitution. Microstructures and X-ray diffraction pattern indicate that the 123 grains are preferentaially aligned with mutually parallel a-b conductive planes. There are a number of twins and fine 211 particles in the sample. It is also found that many crystal defects exist around the 211 phase. These defects may act as pinning centers. |
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