Method of preparing YBa2Cu3O7 powder for forming by drawing-lamination

摘要

A method of preparing a powder of YBaCuO [phase 123] suitable for forming by drawing-lamination, which includes: preparing a powdered reactive mixture of precursors of purity greater than 99% and with a stoichiometry accurate to within less than 1%, binding this powdered reactive mixture to form intermediate pieces less than two millimeters in thickness which are placed in an oven so that their contact with a support is as small as possible, a heat treating the intermediate pieces, dry grinding the intermediate pieces to obtain grains of said powder with an average diameter of the order of a few mu m.