Synthesis of Bismuth-Strontium-Calcium-Copper Oxide powders for Silver Composite Wires with Uniform Micron Sized Filaments
A chemical precipitation method is utilized to synthesize bismuth-strontium-calcium-copper oxide powder. Tetra-methyl ammonium hydroxide and tetra-methyl ammonium carbonate are used as a precipitant and for pH adjustment. Effect of processing parameters like carbonization time, and cation solution concentration on Bi2Sr2CaCu2O8 (Bi-2212) powders is reported. Powders with different particle size and distribution are used to fabricate Ag sheathed multifilamentary Bi-2212 round wires with diameter about 0.06 cm (corresponding to filament diameter about 3 μm). Significant sausaging was observed for wires processed with larger particle size powders. Good filament uniformity was observed for wires produced from finer powders.
Gaines, J. R.,
Motowidlo, L. R.,
Sokolowski, R. S.,
& Mukhopadhyay, S. M.
(1999). Synthesis of Bismuth-Strontium-Calcium-Copper Oxide powders for Silver Composite Wires with Uniform Micron Sized Filaments. IEEE Transactions on Applied Superconductivity, 9 (2), 2601-2604.