Thermodynamic optimization of the systems PbO-SiO2, PbO-ZnO, ZnO-SiO2 and PbO-ZnO-SiO2

Jak, Evgueni; Degterov, S.; Wu, Peng; Hayes, Peter C.; Pelton, Arthur D.

doi:10.1007/s11663-997-0055-x

Cited by 83 publications

(55 citation statements)

References 29 publications

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“…Lead silicate glasses are interesting because lead is the only element for which it is possible to make glass with a very large range of SiO 2 content from 100% down to less than 30% of silica (Jak et al, 1997). These glasses have already been investigated by several research groups from a thermodynamic point of view (Bockris and Mellors, 1956;Nesbitt and Fleet, 1980;Hess, 1974 andGupta 1995) or by a spectroscopic approach (Furukawa et al, 1978;Worrell and Henshall, 1978;Smets and Lommen, 1982;Wang an Zhang, 1996;Ohno et al, 1991 andFeller 2010;Lee and Kim, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…Geller et al (1934) took their investigations for compositions up to 66 mol.% SiO 2 . Jak et al (1997) proposed an optimized phase diagram with compositions up to pure silica. Based on a thermodynamic optimization of the experimental liquidus and activity data, Jak et al (1997) predict the existence of a miscibility gap for the SiO 2 -rich compositions, but this gap has not been experimentally confirmed.…”

Section: Introductionmentioning

confidence: 99%

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Structure and properties of lead silicate glasses and melts

Kacem

Gautron

Coillot³

et al. 2017

Chemical Geology

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To cite this version:Ilyes Ben Kacem, Laurent Gautron, Daniel Coillot, Daniel R. Neuville. Structure and properties of lead silicate glasses and melts. Chemical Geology, Elsevier, 2017, 461, pp.104-114 AbstractViscosity, density and glass transition temperature measurements were performed on the simple PbO-SiO 2 system with increasing PbO content from 5 to 70 mol.%. The results of these analyses have been complemented by spectroscopic studies (Raman & X-Ray Absorption Spectroscopy) in order to link macroscopic properties to structural information at short-and middle-range order. A strong decrease of the viscosity is observed even with the incorporation of 5 mol.% PbO, and this decrease goes on with the increase of PbO content. This effect is confirmed by the continuous decrease of the glass transition temperature with increasing PbO content. Based on our interpretations of Raman spectra, which show similarities to alkali or earth-alkaline-silicate glasses, these effects appear to arise from depolymerization of the silica network. Consequently, lead acts as a network modifier even at low content. Although, it could form PbO 4 tetrahedra when it is present in large quantities, it cannot be asserted that lead acts as a network former at high lead content.Keywords: lead silicate, Raman spectroscopy, Viscosity, glasses, structure of glasses and melts Highlights Lead silicate glasses were made from 95 to 30 mol.% SiO 2 . Pb cation acts as network modifier even above the orthosilicate composition (more than 65 mol.% PbO). Viscosity and deconvolution of all Raman spectra in the PbO-SiO 2 system are presented.2

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Structure and properties of lead silicate glasses and melts

Kacem

Gautron

Coillot³

et al. 2017

Chemical Geology

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“…This overall research program has already been described in previous publications by the present authors. [2][3][4][5][6][7][8][9] …”

Section: Introductionmentioning

confidence: 99%

Experimental study of phase equilibria in the systems PbO x -CaO and PbO x -CaO-SiO2

Jak

Hayes

Liu

1998

Metall Mater Trans B

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The reported experimental work on the systems PbO x -CaO and PbO x -CaO-SiO 2 in air is part of a wider research program that combines experimental and thermodynamic computer modeling techniques to characterize zinc/lead industrial slags. Extensive experimental investigation by high-temperature equilibration and quenching techniques followed by electron probe microanalysis was carried out in the temperature range 640 ЊC to 1500 ЊC (913 to 1773 K) and in the composition ranges 0 to 65 mol pct SiO 2 and 0 to 42 mol pct CaO. Liquidus and solidus data were reported for most of the primary phase fields. Liquidus surfaces in the systems CaO-Pb-O and PbO x -CaO-SiO 2 in air were completely reconstructed. Extensive solid solutions of PbO in ␣' dicalcium silicate and Ca 2 Pb 3 Si 3 O 11 were measured.

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“…3-4. Reactions (4) and (7) change Fe 3+ /Fe 2+ in slag and after diffusion result in change of PbO concentration in slag through reaction (6). Figure 4.…”

Section: Preliminary Experiments and Development Of The Experimental mentioning

confidence: 99%

Experimental Study of Liquidus of the “FeO”-SiO2-PbO Slags in Equilibrium with Air and with Metallic Lead

Shevchenko

Hidayat

Hayes

et al. 2016

Advances in Molten Slags, Fluxes, and Salts: Proceedings of the 10th International Conference on Molten Slags, Fluxes and Salts

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Limited data are available on phase equilibria of the "FeO"-SiO2-PbO slag system at conditions used in the lead smelting due to difficulties from lead vaporization and interactions with metal and ceramic crucibles. Recently experimental procedures have been developed and successfully applied to complex industrial slag-metal-matte systems involving high temperature equilibration on a primary phase substrate and rapid quenching followed by the electron probe X-ray microanalysis. The liquidus isotherms and invariant lines in the "FeO"-SiO2-PbO slag system in equilibrium with air and with metallic lead have been constructed. Preliminary data compared to the FactSage package predictions demonstrate differences in some aspects, indicating the possibility for further improvement of the thermodynamic database. The present work is a part of the integrated experimental and thermodynamic modelling research program on multi-phase lead systems in support of the optimization and development of complex lead smelting, refining and recycling technologies.

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Thermodynamic optimization of the systems PbO-SiO2, PbO-ZnO, ZnO-SiO2 and PbO-ZnO-SiO2

Cited by 83 publications

References 29 publications

Structure and properties of lead silicate glasses and melts

Structure and properties of lead silicate glasses and melts

Experimental study of phase equilibria in the systems PbO x -CaO and PbO x -CaO-SiO2

Experimental Study of Liquidus of the “FeO”-SiO2-PbO Slags in Equilibrium with Air and with Metallic Lead

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