物理化学学报 >> 2013, Vol. 29 >> Issue (12): 2661-2666.doi: 10.3866/PKU.WHXB201310151

材料物理化学 上一篇    下一篇

空气气氛下熔盐法合成β-FeSe

杨承旭1, 鞠晶1, 赵世迪2, 徐航宇1, 刘孟3, 廖复辉1, 李国宝1, 林建华1   

  1. 1 北京大学化学与分子工程学院, 北京分子科学国家实验室, 稀土材料化学及应用国家重点实验室, 北京 100871;
    2 北京汇文中学, 北京 100061;
    3 温州大学化学与材料学院, 浙江温州 325027
  • 收稿日期:2013-06-18 修回日期:2013-10-14 发布日期:2013-11-28
  • 通讯作者: 鞠晶, 李国宝, 林建华 E-mail:jingju@pku.edu.cn;liguobao@pku.edu.cn;jhlin@pku.edu.cn
  • 基金资助:

    国家重点基础研究发展规划项目(973) (2010CB833103)和国家自然科学基金(21201012)资助项目

Synthesis of β-FeSe by Salt-Flux Method under Air Atmosphere

YANG Cheng-Xu1, JU Jing1, ZHAO Shi-Di2, XU Hang-Yu1, LIU Meng3, LIAO Fu-Hui1, LI Guo-Bao1, LIN Jian-Hua1   

  1. 1 State Key Laboratory of Rare Earth Materials Chemistry and Applications, Beijing National Laboratory for Molecular Sciences (BNLMS), College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China;
    2 Beijing Huiwen Middle School, Beijing 100061, P. R. China;
    3 College of Chemistry and Material Science, Wenzhou University, Wenzhou 325027, Zhejiang Province, P. R. China
  • Received:2013-06-18 Revised:2013-10-14 Published:2013-11-28
  • Contact: JU Jing, LI Guo-Bao, LIN Jian-Hua E-mail:jingju@pku.edu.cn;liguobao@pku.edu.cn;jhlin@pku.edu.cn
  • Supported by:

    The project was supported by the National Key Basic Research Project of China (973) (2010CB833103), and National Natural Science Foundation of China (21201012).

摘要:

使用传统方法制备β-FeSe铁基超导体需要隔绝空气的真空条件, 反应温度通常超过800 ℃. 本文采用LiCl/NaCl/KCl 熔盐法在空气条件下得到β-FeSe 铁基超导体. 制备过程简单, 不需要在真空条件下封管处理,熔盐的使用有效降低了反应温度, 并阻止反应物和产物在空气中氧化. 粉末X射线衍射和Rietveld 分析结果表明产物纯度较高. 电性和磁性测试表明β-FeSe在8 K附近有超导性出现.

关键词: β-FeSe, 铁基超导体, 熔盐法, 空气条件, X射线衍射

Abstract:

β-FeSe is typically prepared under vacuum at high temperatures exceeding 800 ℃. Here we develop a new LiCl/NaCl/KCl flux method to successfully synthesize β-FeSe under air atmosphere. The synthetic procedure is simple and without evacuation pretreatment. The flux effectively decreases the synthetic temperature and protects the reactants and products from air. X-ray diffraction data and Rietveld analysis show that the product has high purity. Magnetic and electrical measurements confirm that all samples obtained show superconductivity below 8 K.

Key words: β-FeSe, Iron-based superconductor, Salt-flux method, Air atmosphere, X-ray diffraction

MSC2000: 

  • O646