IN-SITU ELECTROCHEMICAL AND SPECTROPHOTOMETRIC INVESTIGATION OF THE OXYGEN-PRESSURE DEPENDENCE OF THE [CR(VI)] [CR(III)] RATIO IN A BOROSILICATE MELT/

Authors
CLAES P DUVEILLER P TILQUIN JY GLIBERT J
Citation
P. Claes et al., IN-SITU ELECTROCHEMICAL AND SPECTROPHOTOMETRIC INVESTIGATION OF THE OXYGEN-PRESSURE DEPENDENCE OF THE [CR(VI)] [CR(III)] RATIO IN A BOROSILICATE MELT/, Berichte der Bunsengesellschaft fur Physikalische Chemie, 100(9), 1996, pp. 1479-1483
Citations number
18
Categorie Soggetti
Chemistry Physical
Journal title
Berichte der Bunsengesellschaft fur Physikalische Chemie
ISSN journal
00059021 → ACNP
Volume
100
Issue
9
Year of publication
1996
Pages
1479 - 1483
Database
ISI
SICI code
0005-9021(1996)100:9<1479:IEASIO>2.0.ZU;2-G
Abstract
The ratio R = [Cr(VI)]/[Cr(III)] has been measured in a Na2O . 1.2SiO( 2) . 1.2B(2)O(3) melt at 1000 degrees C by spectrophotometry and by el ectrochemistry as a function of the partial pressure of oxygen in the gaseous atmosphere above the melt. Spectrochemical and electrochemical determinations are in quite good agreement and fit the linear relatio nship between log R and log P(O-2) which is predicted by a thermodynam ic development. This double agreement gives a good degree of confidenc e to in situ high temperature electrochemical measurements in oxide me lts.