Temperature independent thermal expansivities of calcium aluminosilicate melts between 1150 and 1973K in the system anorthite–wollastonite–gehlenite (An–Wo–Geh): A density model

Potužák, Marcel; Solvang, Mette; Dingwell, Donald B.

doi:10.1016/j.gca.2006.03.013

Cited by 14 publications

(7 citation statements)

References 43 publications

(106 reference statements)

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“…In general, strong glass formers, such as SiO 2 , exhibit a very low value of T 0 , whereas fragile glass formers exhibit higher values of T 0 . This connection has previously been reported . Finally, we note that the composition dependence of η ∞ based on the VFT model [Fig.…”

Section: Resultssupporting

confidence: 87%

“…This connection has previously been reported. 42,53,54 Finally, we note that the composition dependence of g ∞ based on the VFT model [ Fig. 3(c)] is qualitatively similar to that of g ∞ based on the MYEGA model [ Fig.…”

Section: (3) Composition Dependence Of Vft Parameterssupporting

confidence: 57%

“…We study these multicomponent alkaline‐earth sodium boroaluminosilicate compositions due to their importance in several industrial applications . Moreover, most previous studies in literature on the composition dependence of viscosity deal with simpler systems, such as alkali aluminosilicates, alkaline‐earth aluminosilicates, or alkali boroaluminosilicates . It is thus our aim to establish the impact of modifier field strength on the viscous flow behavior of boroaluminosilicate liquids over a wide compositional regime.…”

Section: Introductionmentioning

confidence: 99%

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Viscosity and Fragility of Alkaline‐Earth Sodium Boroaluminosilicate Liquids

Smedskjær

Potužák

2013

J. Am. Ceram. Soc.

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Understanding the composition and temperature dependence of viscosity of silicate liquids is of the highest importance not only for geological processes but also for production of industrial glass. In this work, we have determined the temperature dependence of equilibrium liquid viscosity of 36 alkaline-earth sodium boroaluminosilicate liquids as a function of the Si/Al ratio and the type of alkaline-earth oxide (MgO, CaO, SrO, or BaO). We demonstrate that the isokom temperature at 10 12 Pa s (i.e., the glass transition temperature) generally increases with increasing Si/Al ratio, whereas the isokom temperatures at 10 4 and 10 1.5 Pa s exhibit a decrease with increasing [Al 2 O 3 ] in the peraluminous regime. The isokom temperatures decrease with increasing alkaline-earth size in the peralkaline regime, whereas they increase with increasing alkaline-earth size in the peraluminous regime. The liquid fragility index m exhibits a minimum value at an intermediate Si/Al ratio, with the position of the minimum increasing to a higher value of [Al 2 O 3 ] with increasing alkaline-earth size. We have discussed our findings in terms of the underlying structural and topological changes as a function of composition and temperature.

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Section: Resultssupporting

confidence: 87%

Section: (3) Composition Dependence Of Vft Parameterssupporting

confidence: 57%

Section: Introductionmentioning

confidence: 99%

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Viscosity and Fragility of Alkaline‐Earth Sodium Boroaluminosilicate Liquids

Smedskjær

Potužák

2013

J. Am. Ceram. Soc.

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“…The dV/dT of the HLW glass and glass melt are compared with those of other silicate glasses and melts containing 50 mol% SiO 2 [58][59][60][61][62][63][64] and pure SiO 2 melt [65] (Fig. 9).…”

Section: Vibrational Vs Configurational Contributions To the Volume Ementioning

confidence: 99%

High-temperature heat capacity and density of simulated high-level waste glass

Sugawara

Katsuki

Shiono

et al. 2014

Journal of Nuclear Materials

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“…Furthermore, measurement errors of the heat capacity of silicate melts determined by the DSC are generally 23%, even if recent commercial calorimeters with high-precision detector are used. 20)22) The drop calorimetry is an experimental technique to measure enthalpy change associated with change of temperature. The heat capacity can be determined from the temperature derivative of the measured relative enthalpies.…”

Section: )5)mentioning

confidence: 99%

Heat capacity measurements of 75SiO2–6B2O3–10Al2O3–9MO (M=Mg, Ca, Sr and Ba) glasses and melts

Sugawara

Hamano

Yoshida

et al. 2013

J. Ceram. Soc. Japan

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Heat capacities of 75SiO 2 6B 2 O 3 10Al 2 O 3 9MO (M=Mg,Ca, Sr and Ba) glasses and melts were determined between 345 and 1877 K by differential scanning calorimetry and drop calorimetry. The heat capacities of glasses and melts increase with increasing field strength of alkaline-earth metals. The glass transition takes place when the heat capacity of glass reaches 9597% of Dulong-Petit harmonic limit. The configurational contribution to the melt heat capacity is about 20% and is independent of temperature. The partial molar heat capacity of B 2 O 3 (Cp B2O3 ) in borosilicate melts containing alkaline-earth metals approaches to constant value (110120 J·K ¹1 ·mol ¹1 ) above 1600 K and is consistent with heat capacity of pure B 2 O 3 liquid. This suggests that there are no significant differences in coordination state of boron and in BSi ordering among Mg, Ca, Sr and Ba-bearing alumino-borosilicate melts.

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Temperature independent thermal expansivities of calcium aluminosilicate melts between 1150 and 1973K in the system anorthite–wollastonite–gehlenite (An–Wo–Geh): A density model

Cited by 14 publications

References 43 publications

Viscosity and Fragility of Alkaline‐Earth Sodium Boroaluminosilicate Liquids

Viscosity and Fragility of Alkaline‐Earth Sodium Boroaluminosilicate Liquids

High-temperature heat capacity and density of simulated high-level waste glass

Heat capacity measurements of 75SiO<sub>2</sub>–6B<sub>2</sub>O<sub>3</sub>–10Al<sub>2</sub>O<sub>3</sub>–9MO (M=Mg, Ca, Sr and Ba) glasses and melts

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