High temperature XRD on silver sheathed Bi(Pb)-2223 tapes in different oxygen partial pressures

A detailed study of the phase formation mechanisms of different precursors in silver sheathed tapes is presented. The method of high temperature x-ray diffraction was used in different oxygen partial pressures and at various heating rates. Fast formation of (3321) was observed. At the same temperature where disappeared, started to form crystals. This observation leads to the assumption that the decomposition is one important factor for the growth and, hence, for the phase formation.