Archive | 2019
Raman Spectroscopy on the KBF 4 –KF–KCl Molten Salt System
Abstract
KBF4–KF–KCl is an important subsystem of KBF4–K2TiF6–KF–KCl molten salt system which is used as the electrolyte to electrodeposit TiB2. In the present study, Raman spectroscopy was used to study the ionic structure of the KBF4–KF–KCl system, in which the molar fraction of KBF4 was 0.3–0.9 and KF and KCl were added with the equimolar molar fraction. Two complexes, namely, BF63− and \\( {\\text{BF}}^{ - }_{{4}} \\) were found in the melts. The addition of KCl to the KF–KBF4 system only had a dilution effect in the melts. Moreover, the addition of Cl− caused a reduction in the relative concentration of F− in the system so that the ion balance between BF63− and \\( {\\text{BF}}_{{4}}^{ - } \\) moved in the direction of \\( {\\text{BF}}_{{4}}^{ - } \\).