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Subsolidus Compatibility in the System NaCl‐KCl‐AlCl 3 ‐NaF‐KF‐AlF 3
Author(s) -
SORRELL CHARLES A.,
GROETSCH JOHN G.
Publication year - 1986
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1986.tb04742.x
Subject(s) - chemistry , halide , inorganic chemistry , compatibility (geochemistry) , analytical chemistry (journal) , mineralogy , materials science , chromatography , composite material
The chemistry and properties of salts used as fluxes for recycling aluminum were studied. Many fluxing salts fall within the system NaCl‐KCl‐AlCl 3 ‐NaF‐KF‐AlF 3 , which has been shown to be a reciprocal system, with NaF‐KCl, KC1‐AIF 3 , and NaCl‐AIF 3 as the stable mixed‐halide binaries. Twelve subsolidus compatibility tetrahedra were determined by X‐ray analyses of samples heated in evacuated sealed tubes. X‐ray measurements of quenched and annealed samples indicate that elpasolite, nominally K 2 NaAlF 6 , has a compositional range between 60 mo% Na 3 AlF 6 , 40 mol% K 3 AlF 6 and 25 mol% Na 3 AlF 6 , 75 mol% K 3 AIF 6 . Improved X‐ray powder data are given for KAIF 4 , showing a previously reported structure to be essentially correct.