ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Physicochemical analyses of some systems important in production of aluminum. IV. Liquidus of the cryolite angle of the system Na₃AlF₆-Al₂O₃-CaF₂-NaCl-MgF₂

K. Matiašovský and M. Malinovský

Slovak Academy of Sciences, Bratislava

Abstract: cf. CA 54, 22100f; 55, 14224h. By thermal analysis and by a visual method, the cryolite angle of the system Na₃AlF₆-Al₂O₃-CaF₂-NaCl-MgF₂ was studied. Liquidus curves of the cryolite angles of 2 plane cuts shown in 8 graphs were constructed. These liquidus curves are of the same type as of the system Na₃AlF₆-Al₂O₃-CaF₂-NaCl. It was proven that the addn. of MgF₂ decreases the temp. of primary crystn. of cryolite fusions and also decreases considerably Al₂O₃ soly. in the fusion. It was detd. that the addn. of NaCl decreases the temp. of primary crystn. of cryolite fusions approx. the same way as MgF₂. NaCl decreases the soly. of Al₂O₃ considerably less than MgF₂.

Full paper in Portable Document Format: 153a161.pdf (in Slovak)

Chemical Papers 15 (3) 161–172 (1961)