郭志超,索红莉,刘志勇,刘敏,马麟

• 1:北京工业大学材料学院国家教育部功能材料重点实验室

摘要(Abstract)：

用PIT(powder in tube)法在不同条件下制备MgB2样品,通过X射线衍射、扫描电子显微镜(SEM)对不同参数下制备样品的成分和微观结构进行了表征;利用Campbell法检测样品的bac-λ′关系,求得样品的超导临界转变电流密度Jc;由样品的Jc结合形貌与相成分对比分析,结果表明:长时间烧结,晶粒较大,利于导电,但缺乏钉扎作用,在外磁场下超导电流减小。长时间烧结,晶界间氧化层增厚,超导电流密度减小。

关键词(KeyWords)： MgB2块材;Campbell法;临界电流密度

Abstract:

Keywords:

基金项目(Foundation): 国家“973”计划(2006CB601005);; 国家“863”项目基金(2009AA032401);; 国家自然科学基金(50771003和50802004);; 北京市自然科学基金(2092006)

作者(Author): 郭志超,索红莉,刘志勇,刘敏,马麟

DOI: 10.13289/j.issn.1009-6264.2011.02.031

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