Abstract
Thermogravimetry (TG)-differential thermal analysis (DTA) and high-temperature microscopy studies of oxalates of yttrium, barium and copper have been made to investigate the formation processes of the (YBa 2Cu 6O y superconductor. TG, DTA and high-temperature X-ray diffractometry were also used to observe phase changes of the superconductor. The final process in the formation of the superconductor has been elucidated and a phase transition accompanied by oxygen sorption was observed in addition to fusion. The equilibrium content of the oxygen sorption was measured by isothermal TG.
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