The Behavior of KBF4 in Potassium-Cryolite-Based Melts. Issue 4 (7th February 2015)

• Record Type: Journal Article
• Authors: Kataev, A.; Tkacheva, O.; Redkin, A.; Rudenko, A.; Dedyukhin, A.; Zaikov, Yu.
• Is Part Of: Journal of the Electrochemical Society. Volume 162:Issue 4(2015)
• Page Start: H283
• Page End: H286
• Publication Date: 2015-02-07
• Subjects: Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0881504jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : 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 Al2 O3 solubility and enlarges the range of homogeneity in the (cryolite-KBF4 )-Al2 O3 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.