| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1818403 | Physica C: Superconductivity and its Applications | 2011 | 4 Pages |
Ba1−xKxBiO3 with x from 0.315 to 0.6 were successfully synthesized by molten salts method and characterized by XRD and magnetic susceptibility measurements. It is found that Ba1−xKxBiO3 powders could directly be precipitated from KOH melts. Superconductivity has been observed in all samples and the highest superconducting transition temperature was found to be Tc = 30.6 K with x = 0.4. The lattice constant linearly depended on the potassium content in accord with the equation of a = 4.3548–0.1743x, and the decrease of the mole ratio of Bi3+/Bi5+ resulted in the increase of the potassium content, which suggested the disproportionation of Bi valence.
► It is found that Ba1–xKxBiO3 powders with x from 0.315 to 0.6 could directly be precipitated from KOH melts. ► Superconductivity has been observed in all samples and the highest was found to be Tc = 30.6 K with x = 0.4. ► It observed that the mole ratio of Bi3+/Bi5+ increased the potassium content, suggesting the disproportionation of Bi valence.
