A nearly pure 110 K phase of the ceramic superconductor Bi 1.92Pb0.38,0.3SbxSr2Ca 2Cu3.2O10- delta was obtained by the technique of co-decomposition of co-precipitated oxalate. Those samples with Sb=0.1, Pb=0.38 had a zero-resistance temperature of 102 K. For those samples with Sb=0.3, Pb=0.3, Tco was equal to 90 K. Their magnetic susceptibilities all dropped sharply at 110 K and did not change at 80 K. X-ray diffraction revealed that there was no 80 K or 20 K phase but a 110 K phase and a new phase. This new phase itself is not superconducting above 77 K, and it belongs to the monoclinic system. The average composition of the new phase is given as Bi32Pb3Sb7Sr29Ca 23Cu7Ox.
All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Condensed Matter Physics
- Metals and Alloys
- Electrical and Electronic Engineering
- Materials Chemistry