THERMAL-CONVERSIONS OF THE, YTTRIUM-BARIUM-COPPER SALT OF CARBOXYLATED CELLULOSE AND THE SYNTHESIS OF YTTRIUM BARIUM CUPRATE FROM IT

Thermal solid-phase conversions of the yttrium-barium-copper salt of t ricarboxycellulose (TCC) with a 1-2-3 cation stoichiometry, respective ly, have been considered. Yttrium barium cuprate is the end product of the thermal treatment of the triple salt. According to the data of x- ray analysis the onset of 1-2-3 phase formation is noticeable at 750-8 00 degrees C. The temperature 875 degrees C (with a duration of heatin g of 12 h) is sufficient for practically complete conversion of the Y- Ba-Cu salt of TCC into YBa2Cu3O7-delta.