Phase diagrams of the KF-K2TaF7 and KF-Ta2O5 systems

Autor:	Eva Mikšíková, V. Danielik, Miroslav Boča, Blanka Kubíková, Z. Ivanová
Rok vydání:	2007
Předmět:	Phase transition Spinodal decomposition Inorganic chemistry Tantalum chemistry.chemical_element Thermodynamics Condensed Matter Physics chemistry Transition metal Binary system Physical and Theoretical Chemistry Thermal analysis Eutectic system Phase diagram
Zdroj:	Journal of Thermal Analysis and Calorimetry. 90:159-165
ISSN:	1572-8943 1388-6150
Popis:	The phase diagrams of the systems KF-K2TaF7 and KF-Ta2O5 were determined using the thermal analysis method. The phase diagrams were described by suitable thermodynamic model. In the system KF-K2TaF7 eutectic points at x KF=0.716 and t=725.4°C and at x KF=0.214 and t=712.2°C has been calculated. It was suggested that K2TaF7 melts incongruently at around 743°C forming two immiscible liquids. The system KF-Ta2O5 have been measured up to 8 mol% of Ta2O5. The eutectic point was estimated to be at x KF∼0.9 and t∼816°C. The formation of KTaO3 and K3TaO2F4 compounds has been observed in the solidified samples.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8fd4101000bbe8429e4a8b3dda0bd01f https://doi.org/10.1007/s10973-006-7700-5 Zobrazit plný text záznamu Plný text ve formátu PDF