Abstract
Bi–Sr–Ca–Cu–O (BSCCO) superconducting whiskers (2212 phase) were prepared by heating in air the compacted specimens of the mixtures of melt-quenched Bi2SryCa2Cu4Al1Ox powders and alumina powders. Formation of the whiskers depends on the composition and the applied pressure of the compacts. The optimum composition of the melt-quenched products for preparing the long whiskers is Bi2Sr2Ca2Cu4Al1Ox. Superconducting whiskers <1 mm in length (2212 phase) containing an excess amount of copper were grown numerously from the specimen compacted at 20 MPa; long whiskers (2212 phase) of 1–5 mm in length were obtained from that compacted at 180 MPa. These whiskers showed diamagnetic signals below Tc ≃ 80 K.
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Kasuga, T., Ono, M., Tsuji, K. et al. Formation of Bi-2212 superconducting whiskers from melt-quenched BSCCO containing alumina. Journal of Materials Research 9, 1098–1103 (1994). https://doi.org/10.1557/JMR.1994.1098
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DOI: https://doi.org/10.1557/JMR.1994.1098