Citation: LIU Meng, LI Guo-Bao, WANG Jia-Guo, LIAO Fu-Hui, LIN Jian-Hua. Low-Temperature Synthesis of Superconductor Ba_1-xK_xBiO₃[J]. Acta Physico-Chimica Sinica, ;2014, 30(9): 1611-1615. doi: 10.3866/PKU.WHXB201406201 shu

Low-Temperature Synthesis of Superconductor Ba_1-xK_xBiO₃

1.
1. College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, Zhejiang Province, P. R. China;
2. Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China

Received Date: 8 April 2014
Available Online: 20 June 2014
Fund Project:

Ba_1-xK_xBiO₃ (BKBO) was synthesized using a topotactic reaction, which involves a conventional solidstate synthesis of pure BaBiO₃, using BaCO₃ and Bi₂O₃ as the raw materials, and subsequent treatment of BaBiO₃ in a KOH flux at low temperature. All samples were characterized using X-ray diffraction (XRD) and magnetic susceptibility measurements. The XRD patterns show that there is no apparent impurity in the obtained Ba_1-xK_xBiO₃ samples, and all the diffraction data can be indexed using a pseudo-cubic cell. All the samples showed superconductivity, and the highest superconducting transition temperature (T_c) was 30.6 K. The influences of the reaction time and the ratio of the precursor to the molten salts on the transition temperature were investigated. The best reaction conditions were treatment at 450 ℃ for 4 h, with BaBiO₃:KOH:KF mass ratio of 1:5:2.5.
- Ba_1-xK_xBiO₃,
- X-ray diffraction,
- Bismuthate superconductor,
- Topotactic reaction
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1.
沈阳化工大学材料科学与工程学院沈阳 110142

Low-Temperature Synthesis of Superconductor Ba1-xKxBiO3

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通讯作者: 陈斌, bchen63@163.com

Low-Temperature Synthesis of Superconductor Ba_1-xK_xBiO₃