Fázový diagram soustavy SnF2 NaF

Phase Diagram of the SnF2 NaF System

conference paper

en

Two components system of fluoride salts SnF2 NaF was studied experimentally and theoretically in order to determine its temperature of primary crystallization. To study the binary system experimentally cooling curves of various system samples were measured. On the basis of these cooling curves the phase diagram of system was constructed. Selected samples after their cool down were used for formed compounds determination. Further the temperature of primary crystallization of the SnF2 NaF system was calculated using a thermodynamic model and calculated values were compared with measured data. Obtained results were compared with the published SnF2 NaF phase diagram and consequently important differences were established. These differences were explained in the paper and a new modified phase diagram of the SnF2 NaF system was drawn.

Příspěvek se zabývá problematikou měření a výpočtu binárního fázového diagramu soustavy SnF2 NaF, která je uvažována jako jeden z kandidátů pro chladivo sekundárního okruhu Molten Salt Reactor. V první části příspěvku je v krátkosti rozebrána metodika měření a vyhodnocení fázových diagramů. V další části příspěvku jsou představena naměřená data a fázový diagram soustavy SnF2 NaF sestavený z těchto hodnot. Následuje představení hlavních výpočtových kroků, které jsou použity při výpočtu fázového diagramu. Potom jsou v další části zobrazena vypočtená data a fázový diagram sestavený z vypočtených hodnot. V závěru příspěvku jsou porovnány naměřené a vypočtené hodnoty a jsou zde formulovány některé závěry, které z měření a výpočtu vyplývají.

Two components system of fluoride salts SnF2 NaF was studied experimentally and theoretically in order to determine its temperature of primary crystallization. To study the binary system experimentally cooling curves of various system samples were measured. On the basis of these cooling curves the phase diagram of system was constructed. Selected samples after their cool down were used for formed compounds determination. Further the temperature of primary crystallization of the SnF2 NaF system was calculated using a thermodynamic model and calculated values were compared with measured data. Obtained results were compared with the published SnF2 NaF phase diagram and consequently important differences were established. These differences were explained in the paper and a new modified phase diagram of the SnF2 NaF system was drawn.

molten salt reactor coolant, SnF2 – NaF system phase diagram, SnF2 – NaF system stability

2005

01.09.2005

Université Paul Sabatier, 118, route de Narbonne, 31062 Toulouse, cedex 4

Toulouse, France

7th International Symposium on Molten Salts Chemistry and Technology

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