Experimental determination of the liquidus temperatures of the binary (SiO2–ZnO) system in equilibrium with air

Xia, Longgong; Liu, Zhihong; Taskinen, Pekka

doi:10.1016/j.jeurceramsoc.2015.07.007

Cited by 24 publications

(13 citation statements)

References 24 publications

(33 reference statements)

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“…1785 ± 3 K ) were ascertained at 1721 ± 5 K and 0.52 ± 0.01 mole fraction ZnO, and at 1775 ± 5 K and 0.71 ± 0.01 mole fraction ZnO, respectively. Xia et al [17] studied the SiO2-ZnO system using an equilibration and quenching technique in a wide temperature range from 1703 to 1963 K. Their results obtained by EPMA confirmed the findings reported by Hansson et al [16] and expanded the experimental data range.…”

Section: Literature On the Zno-sio2 Systemsupporting

confidence: 61%

“…The binary SiO2-ZnO system has been experimentally studied [9][10][11][12][13]16,17] and thermodynamically assessed [14,15] by a few researchers. Bunting [9] measured the SiO2-ZnO phase diagram features using an equilibration-quenching-optical microscopy analysis technique and found a large liquid immiscibility region in the SiO2 rich side at elevated temperatures, one compound (willemite or zinc orthosilicate Zn2SiO4), and two eutectic reactions ( L→SiO2+Zn2SiO4 and L→ZnO+Zn2SiO4 ).…”

Section: Literature On the Zno-sio2 Systemmentioning

confidence: 99%

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Thermodynamic assessment of ZnO-SiO2 system

Isomäki

Zhang

Xia

et al. 2018

Transactions of Nonferrous Metals Society of China

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A complete literature review, critical evaluation of the available data and thermodynamic optimization of the phase equilibria and thermodynamic properties of oxide phases in SiO2-ZnO system at 1 atm pressure are presented. The molten oxide phase is described with an associate solution model. A set of optimised model parameters of all phases was obtained which reproduces all available and reliable thermodynamic and phase equilibrium data within their experimental error limits from 298 K to above the liquidus temperatures over the entire composition range. The created database of the model parameters can be used in the Gibbs energy minimization software to calculate the thermodynamic properties and the phase diagram sections of interest.

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Section: Literature On the Zno-sio2 Systemsupporting

confidence: 61%

Section: Literature On the Zno-sio2 Systemmentioning

confidence: 99%

Thermodynamic assessment of ZnO-SiO2 system

Isomäki

Zhang

Xia

et al. 2018

Transactions of Nonferrous Metals Society of China

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“…19 Once, the predetermined equilibration time was reached, the specimen was released and quenched rapidly into the icewater bath (0°C). 19 Once, the predetermined equilibration time was reached, the specimen was released and quenched rapidly into the icewater bath (0°C).…”

Section: (2) Equilibration Apparatuses and Techniquementioning

confidence: 99%

“…The experiments were conducted with the bottom and the top of the reaction tube (gahnite (Al 2 O 3 ) working tube, length 120 cm, diameter 25 mm) open to the ambient atmosphere, to ensure the contact with air (P O2 = 0.21 atm). 19 Once, the predetermined equilibration time was reached, the specimen was released and quenched rapidly into the icewater bath (0°C). It was then dried and mounted in an epoxy resin.…”

Section: (2) Equilibration Apparatuses and Techniquementioning

confidence: 99%

Phase Equilibrium Study of the CaO–ZnO System

2016

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Phase relationships of the CaO–ZnO system in equilibrium with air (PnormalO2 = 0.21 atm) have been studied for the first time using the equilibration/quenching/EPMA technique in the temperature range from 1000°C to 1600°C. In this study, the mutual solubility boundaries of the CaO and ZnO phases have been determined. Both CaO and ZnO have obvious solubilities in each other. The maximum solubility of ZnO in solid CaO phase is 23.21 at.% at 1535°C, and ZnO solid phase can take up to 4.81 at.% CaO at 1535°C. The eutectic point and parts of the liquidus lines have also been determined. The eutectic point was found to be at 1535°C ± 2°C and 0.6612 mole fraction of ZnO. No compound was found in this system, and there were two primary phases: halite‐structured CaO (lime) and wurtzite‐structured ZnO (zincite). Results from this study were compared with the CaO–ZnO phase diagram calculated by MTDATA 5.10 and its MTOX 8.1 database. The difference was significant, and the thermodynamic description of the system requires a reassessment.

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“…However, the high melting point of ZnO (1970 ± 5 °C) [8,9] and MgO (2825 ± 42 °C) [10,11], and the large vapor pressure of ZnO at temperatures above 1400 °C [12][13][14] make it difficult to study the MgO-ZnO phase diagram by an experimental approach. So far, the phase diagram and thermodynamic information of the MgO-ZnO system are uncomplete.…”

Section: A N U S C R I P Tmentioning

confidence: 99%