Studies on sintering of solid state synthesized Ba1−xKxBiO3−δ superconducting phase

Shaikh, F.I.; Kalubarme, Ramchandra S.; Pawar, S.H.

doi:10.1016/j.apsusc.2008.03.143

Cited by 1 publication

(2 citation statements)

References 15 publications

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“…Ba1-xKxBiO3 (BKBO) is a very interesting superconductor with transition temperature (Tc) about 30 K because it has threedimensional (3D) perovskite structure and no transition metal elements, 1 which has been known for more than thirty years with continuous studies up to now. [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] Comparing to other supercon-ductors such as cuprate superconductors, 17,18 MgB2, 19,20 and Fe-base superconductors, 21,22 the studies on BKBO seem less. One possible reason may be that the pure superconducting BKBO is not easy to be obtained.…”

Section: Introductionmentioning

confidence: 99%

“…One possible reason may be that the pure superconducting BKBO is not easy to be obtained. Several methods have been reported to synthesize the bulk BKBO superconductors, such as the traditional solid state, 3,4 the high temperature and high pressure, 5,6 electrochemical, 7 Vol.30 hydrothermal, 8 and molten salt method. 9,10,11 Impurities are usually found in the final products to obtain BKBO superconductor by traditional solid state reaction.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Low-Temperature Synthesis of Superconductor Ba1-xKxBiO3

Li¹,

Li²,

Wang³

et al. 2014

Acta Physico-Chimica Sinica

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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 Ba1-xKxBiO3 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 (Tc) 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°C for 4 h, with BaBiO3:KOH:KF mass ratio of 1:5:2.5.

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