| The preparation of polycrystalline YBa;The first method involves the preparation of YBCO precursors by the simultaneous thermal decomposition of the nitrates of yttrium, barium and copper in an anhydrous fused eutectic of sodium and potassium hydroxide. The objective of this method was to eliminate the need for any mechanical grinding or the introduction of carbon containing anions. This method produced fine YBCO precursor powders consisting of Y(OH);The idea of diffusionless solid state reactions was explored by considering the results from kinetic studies of YBCO formation from freeze dried precursors. |
