EFFECT OF CALCIUM-FLUORIDE ADDITION TO MOLTEN NAF-ALF3 MIXTURES - A STUDY BY RAMAN-SPECTROSCOPY

被引：16

作者：

ROBERT, E ^{[1
]}

MATERNE, T ^{[1
]}

TIXHON, E ^{[1
]}

GILBERT, B ^{[1
]}

机构：

[1] UNIV LIEGE,ANALYT CHEM & RADIOCHEM LAB,B-4000 SART,BELGIUM

来源：

VIBRATIONAL SPECTROSCOPY | 1993年 / 6卷 / 01期

关键词：

RAMAN SPECTROMETRY; CALCIUM FLUORIDE; FLUOROALUMINATES; MOLTEN SALTS;

D O I：

10.1016/0924-2031(93)87023-M

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

NaF-AlF3-CaF2 molten mixtures have been investigated by Raman spectroscopy. In good agreement with the phase diagram, the conductivity and some vapour pressure measurements, it shows unequivocally that CaF2 behaves as a fluoride donor, more in acidic than in cryolite NaF-AlF3 baths. This behaviour fades, however, if the mixture becomes more basic. Quantitative analysis of the CaF2 addition effect on NaF-AlF3 spectra was performed using a band deconvolution method. It allowed the determination of the overall solvent acidity change involved with CaF2 additions and confirms the decreasing basic character of this additive when the basicity of the bath increases.

引用

页码：71 / 78

页数：8

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