Liquidus surface of MgO-CaO-Al2O3-SiO2 glass-forming systems

Brett M. Abel, John Mauro, Morten M. Smedskjaer, James M. Morgan, Christopher L. Lapierre, Gary R. Swan, Mark E. MacK, Adam J. Ellison

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Alkaline earth aluminosilicate systems are of widespread technological importance, and it is therefore essential to have accurate phase equilibrium diagrams available. While the phase equilibria for the single alkaline earth CaO-Al2O3-SiO2 and MgO-Al2O 3-SiO2 systems are fairly well established, the mixed MgO-CaO-Al2O3-SiO2 systems have received little attention despite their important role in the high-tech glass industry. Here, the liquidus surface (liquidus temperature Tliq and primary devitrification phase) is determined by x-ray diffraction phase analyses of isothermally reacted samples from powder mixtures. The phase equilibrium diagrams are presented based on measurements on a total of 120 compositions. In the composition range of interest for industrial glasses, Tliq tends to increase with increasing silica content and decreasing alkaline earth-to-alumina ratio. Cristobalite, mullite, anorthite, and cordierite are found to be the dominant devitrification phases for the compositions with high SiO2, Al2O3, CaO, and MgO contents, respectively. Anorthite extends further into the cristobalite and mullite fields for the [CaO]/[MgO] = 3 system compared to the cordierite behavior in systems with [MgO]/[CaO] = 3. For systems with [MgO] = [CaO], the liquidus temperatures are shifted to lower values since the formation of anorthite and cordierite requires some critical concentration of CaO and MgO, respectively.

Original languageEnglish (US)
Pages (from-to)39-45
Number of pages7
JournalJournal of Non-Crystalline Solids
Volume363
Issue number1
DOIs
StatePublished - Jan 21 2013

Fingerprint

liquidus
Silicon Dioxide
Phase equilibria
cordierite
Mullite
Earth (planet)
phase diagrams
Glass
glass
Chemical analysis
Glass industry
Aluminum Oxide
Aluminosilicates
crystallization
Powders
Alumina
Diffraction
Silica
X rays
Temperature

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

Cite this

Abel, B. M., Mauro, J., Smedskjaer, M. M., Morgan, J. M., Lapierre, C. L., Swan, G. R., ... Ellison, A. J. (2013). Liquidus surface of MgO-CaO-Al2O3-SiO2 glass-forming systems. Journal of Non-Crystalline Solids, 363(1), 39-45. https://doi.org/10.1016/j.jnoncrysol.2012.12.020
Abel, Brett M. ; Mauro, John ; Smedskjaer, Morten M. ; Morgan, James M. ; Lapierre, Christopher L. ; Swan, Gary R. ; MacK, Mark E. ; Ellison, Adam J. / Liquidus surface of MgO-CaO-Al2O3-SiO2 glass-forming systems. In: Journal of Non-Crystalline Solids. 2013 ; Vol. 363, No. 1. pp. 39-45.
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Abel, BM, Mauro, J, Smedskjaer, MM, Morgan, JM, Lapierre, CL, Swan, GR, MacK, ME & Ellison, AJ 2013, 'Liquidus surface of MgO-CaO-Al2O3-SiO2 glass-forming systems', Journal of Non-Crystalline Solids, vol. 363, no. 1, pp. 39-45. https://doi.org/10.1016/j.jnoncrysol.2012.12.020

Liquidus surface of MgO-CaO-Al2O3-SiO2 glass-forming systems. / Abel, Brett M.; Mauro, John; Smedskjaer, Morten M.; Morgan, James M.; Lapierre, Christopher L.; Swan, Gary R.; MacK, Mark E.; Ellison, Adam J.

In: Journal of Non-Crystalline Solids, Vol. 363, No. 1, 21.01.2013, p. 39-45.

Research output: Contribution to journalArticle

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T1 - Liquidus surface of MgO-CaO-Al2O3-SiO2 glass-forming systems

AU - Abel, Brett M.

AU - Mauro, John

AU - Smedskjaer, Morten M.

AU - Morgan, James M.

AU - Lapierre, Christopher L.

AU - Swan, Gary R.

AU - MacK, Mark E.

AU - Ellison, Adam J.

PY - 2013/1/21

Y1 - 2013/1/21

N2 - Alkaline earth aluminosilicate systems are of widespread technological importance, and it is therefore essential to have accurate phase equilibrium diagrams available. While the phase equilibria for the single alkaline earth CaO-Al2O3-SiO2 and MgO-Al2O 3-SiO2 systems are fairly well established, the mixed MgO-CaO-Al2O3-SiO2 systems have received little attention despite their important role in the high-tech glass industry. Here, the liquidus surface (liquidus temperature Tliq and primary devitrification phase) is determined by x-ray diffraction phase analyses of isothermally reacted samples from powder mixtures. The phase equilibrium diagrams are presented based on measurements on a total of 120 compositions. In the composition range of interest for industrial glasses, Tliq tends to increase with increasing silica content and decreasing alkaline earth-to-alumina ratio. Cristobalite, mullite, anorthite, and cordierite are found to be the dominant devitrification phases for the compositions with high SiO2, Al2O3, CaO, and MgO contents, respectively. Anorthite extends further into the cristobalite and mullite fields for the [CaO]/[MgO] = 3 system compared to the cordierite behavior in systems with [MgO]/[CaO] = 3. For systems with [MgO] = [CaO], the liquidus temperatures are shifted to lower values since the formation of anorthite and cordierite requires some critical concentration of CaO and MgO, respectively.

AB - Alkaline earth aluminosilicate systems are of widespread technological importance, and it is therefore essential to have accurate phase equilibrium diagrams available. While the phase equilibria for the single alkaline earth CaO-Al2O3-SiO2 and MgO-Al2O 3-SiO2 systems are fairly well established, the mixed MgO-CaO-Al2O3-SiO2 systems have received little attention despite their important role in the high-tech glass industry. Here, the liquidus surface (liquidus temperature Tliq and primary devitrification phase) is determined by x-ray diffraction phase analyses of isothermally reacted samples from powder mixtures. The phase equilibrium diagrams are presented based on measurements on a total of 120 compositions. In the composition range of interest for industrial glasses, Tliq tends to increase with increasing silica content and decreasing alkaline earth-to-alumina ratio. Cristobalite, mullite, anorthite, and cordierite are found to be the dominant devitrification phases for the compositions with high SiO2, Al2O3, CaO, and MgO contents, respectively. Anorthite extends further into the cristobalite and mullite fields for the [CaO]/[MgO] = 3 system compared to the cordierite behavior in systems with [MgO]/[CaO] = 3. For systems with [MgO] = [CaO], the liquidus temperatures are shifted to lower values since the formation of anorthite and cordierite requires some critical concentration of CaO and MgO, respectively.

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