Abstract
Raman spectra of NaF-AlF3-NaCl melts with the compositions in aluminum electrolysis practice are recorded by using the ultraviolet laser source. A kind of sealed sample cell was used to improve the measuring precision. The ionic structure of the melts with different cryolite ratio (molar ratio between NaF and AlF3) and NaCl contents was studied. The effect of the composition and temperature was analyzed. The results show that with the addition of the NaCl to the acidic NaF-AlF3 melts, the relative contents of the Al-F entities have been changed greatly. It is thought that the relative contents of the complex ions are also greatly influenced by the temperature.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
E. Robert, T. Materne, E. Tixhon, et al. Effect of calcium fluoride addition to molten NaF-AlF3 mixtures: a study by Raman spectroscopy, Vibrational Spectroscopy, 1993, 6: 71–78.
B. Gilbert, E. Robert, E. Tixhon, et al. Acid-base properties of cryolite based melts with CaF2, MgF2 and Al2O3 additions. A Comparison between Raman and vapour pressure measurements, Light Metals 1995, Warrendale: Minerals, Metals & Materials Soc, 1995: 181–194.
B. Gilbert, E. Rober, E. Robert. Structure and thermodynamics of NaF-AlF3 melts with addition of CaF2 and MgF2, Inorganic Chemistry, 1996, 35(14): 4198–4210.
E. Tixhon, E. Robert, B. Gilbert. The molten MF-AlF3-MCl system (M = K, Na): a study by Raman spectroscopy, Vibrational Spectroscopy, 1996, 13: 91–98.
X. W. Hu, Z. W. Wang, G. M. Lu, et al. Raman spectra of ionic structure for acidic NaF-AlF3 melts, The Chinese Journal of Noferrous Metals, 2008, 18(10): 1914–1919.
B. Gilbert, G. Mamantov. Raman spectrum of AlF4 - ion in molten fluorides, Inorganic & Nuclear Chemistry Letters, 1974, 10(12): 1123–1129.
B. Gilbert, T. Materne. Reinvestigation of molten fluoroaluminate Raman spectra: the question of the existence of AlF5 2− ions, Applied Spectroscopy, 1990, 44(2): 299–305.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2012 TMS (The Minerals, Metals & Materials Society)
About this chapter
Cite this chapter
Xianwei, H. et al. (2012). Micro-Raman Spectra Research on NaF-AlF3-NaCl Melts. In: Suarez, C.E. (eds) Light Metals 2012. Springer, Cham. https://doi.org/10.1007/978-3-319-48179-1_138
Download citation
DOI: https://doi.org/10.1007/978-3-319-48179-1_138
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48570-6
Online ISBN: 978-3-319-48179-1
eBook Packages: Chemistry and Materials ScienceChemistry and Material Science (R0)