T 44 The Behavior of KBF4 in Potassium-Cryolite-Based Melts / А. Kataev, O. Tkacheva, A. Redkin, A. Rudenko, A. Dedyukhin , Yu. Zaikov // Journal of the Electrochemical Society. - 2015. - Vol. 162, № 4. - PH283-H285 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ТЕМПЕРАТУРА ЛИКВИДУСА -- КРИОЛИТ -- ПРОВОДИМОСТЬ Аннотация: The KBF4 impact on the physical-chemical properties of the KF-AlF3 and KF-NaF(10 wt%)-AlF3 melts with cryolite ratio (CR) 1.3–1.5 was studied at temperatures 700–800°C. The KBF4 additions (up to 15 mol%) to the potassium-cryolite-based electrolytes increase the liquidus temperature, however, the KBF4 presence in the cryolite-alumina melt improves the Al2O3 solubility and enlarges the range of homogeneity in the (cryolite-KBF4)-Al2O3 system. The KBF4 additions (within a concentration range of 0–10 mol%) do not noticeably impact the electrical conductivity of the KF-AlF3-KBF4 melt (CR = 1.3). The mass loss of the KF-AlF3-KBF4 samples with low CR determined by thermogravimetry analysis over two hours is not higher than 3% at temperature 800°C. |