High pressure synthesis and superconductivity of Ba1−K BiO3 (0.35&lt;x&lt;1)

Kim, D.C.; Баранов, А. Н.; Kim, J.S.; Kim, B.J.; Kim, Y.C.; Pshirkov, J. S.; Antipov, Evgeny V.; Park, Y.W.

doi:10.1016/s0921-4534(02)01332-1

Cited by 16 publications

(11 citation statements)

References 41 publications

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“…The maximum T c = 15 K of BKSO at x = 0.65 is found to be lower than that of BKBO at x = 0.4, T c ≈ 30 K, but at comparable potassium concentrations, is higher than that of BKBO (7.0 K at x = 0.66 (ref. 40 )) by more than a factor of two, as seen in Fig. 4b.…”

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confidence: 75%

Superconductivity in (Ba,K)SbO3

et al. 2022

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Abstract(Ba,K)BiO3 constitute an interesting class of superconductors, where the remarkably high superconducting transition temperature Tc of 30 K arises in proximity to charge density wave order. However, the precise mechanism behind these phases remains unclear. Here, enabled by high-pressure synthesis, we report superconductivity in (Ba,K)SbO3 with a positive oxygen–metal charge transfer energy in contrast to (Ba,K)BiO3. The parent compound BaSbO3−δ shows a larger charge density wave gap compared to BaBiO3. As the charge density wave order is suppressed via potassium substitution up to 65%, superconductivity emerges, rising up to Tc = 15 K. This value is lower than the maximum Tc of (Ba,K)BiO3, but higher by more than a factor of two at comparable potassium concentrations. The discovery of an enhanced charge density wave gap and superconductivity in (Ba,K)SbO3 indicates that strong oxygen–metal covalency may be more essential than the sign of the charge transfer energy in the main-group perovskite superconductors.

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confidence: 75%

Superconductivity in (Ba,K)SbO3

et al. 2022

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“…As of 2012, perovskites have been identified as possible inexpensive base materials for highefficiency commercial photovoltaics, and perovskites also have optoelectronic properties such as strong light absorption and facilitated charge transport [3]. Some of perovskites' typical properties are ferromagnetism [4], piezoelectricity [5,6], electrical conductivity [7,8], superconductivity [9,10], ion conductivity [11,12], magnetism [13,14], catalytic properties [15,16], electrode materials [17,18], and optical [19,20].…”

Section: Introductionmentioning

confidence: 99%

Perovskite-Based Materials for Energy Applications

Dragan¹,

Enache²,

Varlam³

et al. 2020

Perovskite Materials, Devices and Integration

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The role of energy in modern society is fundamental. Constraints due to the emissions of air pollutants from the excessive use of fossil fuels have increased dramatically in the last years. Over the years various devices and systems have been developed to transform energy from forms supplied by nature to forms that can be used by people. Another issue is to absorb energy generated at one time and to discharge it to supply power at a later time, what is called energy storage. This is also a matter to focus when it comes to searching for solutions of energy problems. Perovskites are promising key materials for energy applications, and in this chapter is a literature review summarizing the reported progress in energy applications of perovskite-type ceramic materials. To understand the fundamental nature of structure-property relationships, defect chemistry plays an important role. This paper, a mini-review, briefly describes from available literature and summarizes accordingly. It is focused on perovskite crystal structures, perovskite materials for solid oxide fuel cells, perovskite electrocatalyst and photocatalysts, and perovskite transport features.

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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%

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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High pressure synthesis and superconductivity of Ba1−K BiO3 (0.35<x<1)

Cited by 16 publications

References 41 publications

Superconductivity in (Ba,K)SbO3

Superconductivity in (Ba,K)SbO3

Perovskite-Based Materials for Energy Applications

Low-Temperature Synthesis of Superconductor Ba<sub>1-<em>x</em></sub>K<sub><em>x</em></sub>BiO<sub>3</sub>

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