| 摘要 |
An oxide ceramic superconductor is obtained by mixing the oxides of bismuth, strontium, calcium and copper, the atomic ratios of the metals corresponding to those of a high-temperature superconductor. A powdered alkaline earth indate of formula (Sr,Ca)In2O4 is added to the mixture, which then undergoes prolonged heating in the presence of oxygen. The presence of the indate promotes the formation of a phase with a transition temperature of 110 K. |
