TY - JOUR

T1 - High-temperature mass spectrometric study of the vaporization processes in the system CaO-MgO-Al2O3-Cr2O3-FeO-SiO2

AU - Wang, L.J.

AU - Stolyarova, V.L.

AU - Lopatin, S.I.

AU - Seetharaman, S.

PY - 2009

Y1 - 2009

N2 - Knudsen effusion mass spectrometry was used to study vaporization processes and thermodynamic properties of twenty samples of chromium-containing slags in the CaO-MgO-Al2O3-Cr2O3-FeO-SiO2 system in the temperature range 1850–2750K. Tungsten cells were used and Cr2O3 solid was used as a reference material. The system was calibrated using liquid gold. As FeO was the first emanating vapor species, monitoring of the chromium-containing species could be carried out only after the complete vaporization of FeO. This, however, was found to have very little impact on the concentration of the slags investigated. During the measurements, the ion current intensities of CrOR and CrOR2 species in the mass spectra of the vapor over the CaO-MgO-Al2O3-Cr2O3-FeO-SiO2 samples were monitored and compared with those corresponding to solid Cr2O3. Data on the partial pressures of vapor species as well as the activities of Cr2O3 as a function of temperature were obtained. The results are expected to be valuable in the optimization o

AB - Knudsen effusion mass spectrometry was used to study vaporization processes and thermodynamic properties of twenty samples of chromium-containing slags in the CaO-MgO-Al2O3-Cr2O3-FeO-SiO2 system in the temperature range 1850–2750K. Tungsten cells were used and Cr2O3 solid was used as a reference material. The system was calibrated using liquid gold. As FeO was the first emanating vapor species, monitoring of the chromium-containing species could be carried out only after the complete vaporization of FeO. This, however, was found to have very little impact on the concentration of the slags investigated. During the measurements, the ion current intensities of CrOR and CrOR2 species in the mass spectra of the vapor over the CaO-MgO-Al2O3-Cr2O3-FeO-SiO2 samples were monitored and compared with those corresponding to solid Cr2O3. Data on the partial pressures of vapor species as well as the activities of Cr2O3 as a function of temperature were obtained. The results are expected to be valuable in the optimization o

KW - chromium oxide

KW - slags

KW - melt

KW - vaporization

KW - thermodynamics

KW - high-temperature mass spectrometry

M3 - Article

VL - 23

SP - 2233

EP - 2239

JO - Rapid Communications in Mass Spectrometry

JF - Rapid Communications in Mass Spectrometry

SN - 0951-4198

IS - 14

ER -