TERMOGRAVIMETRIC INVESTIGATION OF HTSC LN123 COMPOUNDS SYNTHESIS
UDC 546.65'56+538.245
Keywords:
-Abstract
Thermogravimetric investigations of mixture of LnBa2Cu3O7 (Ln = Y, La, Sm, Gd) were conducted. It was shown that there are two
weight losses for all samples: first at 390 °C – lo ss of constitutional water, second at interval 510–650 °C – corresponds to carbon dioxide releasing as a result of barium carbonate reaction with lanthanide and copper oxides. Endoeffects seen on DTA curves are connected with partial melting of intermediates (825 °C) and with peritectic melting of synthesized phase LnBa2Cu3O7 (965–970 °C). Weight
changing almost stops at 930–940 °C.
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Copyright (c) 2010 С. Неділько, д-р хім. наук, Ю. Шафорост, асп., О. Зенькович, канд. хім. наук
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