Solubility and thermodynamic properties of Y2O3 in LiF-YF3 melts
Creators
- 1. Univ. of Nevada, Reno (United States). Dept. of Chemical and Metallurgical Engineering
Description
A systematic investigation was undertaken to measure the solubility of Y2O3 in several LiF-YF3 melts, with the YF3 composition ranging from 20 to 50 mole pct, in the temperature range of 998 to 1,273 K. Experimental results showed that the solubility of Y2O3 in the melts increased with increase in temperature and also with increased YF3 content. The activity Of Y2O3 was calculated using the free energy of fusion of Y2O3, ΔG degree m,Y2O3. The ΔG degree m,Y2O3 was deduced from the values of enthalpy, heat of fusion, and melting point of Y2O3. From the known values of activity, the activity coefficients of Y2O3 as a function of temperature and melt composition were calculated. Considering the ionic nature of the melt, activity coefficients were also calculated using Temkin's ideal mixing and electrically equivalent fraction methods. The thermodynamic data, such as integral molar enthalpy, entropy, and free energy of formation, were calculated as a function of composition and temperature. The calculated thermodynamic data showed that the melt exhibited a negative deviation from ideal conditions
Additional details
Publishing Information
- Journal Title
- Metallurgical Transactions. B, Process Metallurgy
- Journal Volume
- 25
- Journal Issue
- 1
- Journal Page Range
- p. 91-96.
- ISSN
- 0360-2141
- CODEN
- MTTBCR
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 25054756
- Subject category
- S36: MATERIALS SCIENCE; S36: MATERIALS SCIENCE;
- Descriptors DEI
- ALUMINIUM ALLOYS; FABRICATION; LITHIUM FLUORIDES; PHASE STUDIES; SOLUBILITY; SOLVENT PROPERTIES; THERMODYNAMIC PROPERTIES; YTTRIUM ALLOYS; YTTRIUM FLUORIDES; YTTRIUM OXIDES
- Descriptors DEC
- ALKALI METAL COMPOUNDS; ALLOYS; CHALCOGENIDES; FLUORIDES; FLUORINE COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; LITHIUM COMPOUNDS; LITHIUM HALIDES; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS