Topological understanding of thermal conductivity in synthetic slag melts for energy recovery: An experimental and molecular dynamic simulation study

Yang, Jian; Wang, Zhe; Sohn, Il

doi:10.1016/j.actamat.2022.118014

Cited by 13 publications

(1 citation statement)

References 55 publications

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“…Previous studies show thermal conductivities of diopside (C. Wang et al, 2014), enstatite (Hunt et al, 2011) and quartz (Yoon et al, 2004), are higher than those of tremolite at the temperature range of 1,173-1,373 K (dehydration stage), while new phases may be in amorphous state during the dehydration process (Faust & Fahey, 1962), which led to a significant decrease in thermal conductivity (Seipold & Schilling, 2003). Melting of minerals may also affect the thermal conductivity (Sukenaga et al, 2021;Yang et al, 2022), however, melts were not observed in our samples according to BSE images (Figure 2), which is similar to a previous study (Shen et al, 2020). Therefore, we propose that after dehydration, thermal conductivity was controlled by aqueous fluids.…”

Section: Implications For Physical Mechanisms Of Heat Transportmentioning

confidence: 99%

Thermal Conductivity and Thermal Diffusivity of Tremolite at High Temperature and Pressure and Implications for the Thermal Structure of the Venusian Lithosphere

et al. 2023

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Thermal conductivity (κ) and thermal diffusivity (D) of tremolite were measured at up to 2.5 GPa and 1,373 K using the transient plane‐source method in a multi‐anvil apparatus. Thermal conductivity and thermal diffusivity of tremolite decrease monotonically before dehydration (<1,173 K) and increase significantly after dehydration. Tremolite exhibits positive pressure dependence before dehydration. Heat capacity (C) of tremolite calculated from κ and D shows a positive pressure dependence and is controlled by an almost constant thermal expansion coefficient (α) with temperature. Conductive heat transport and radiative heat transport dominate the heat transport process before dehydration, and the significant increase in thermal conductivity after dehydration is attributed to convective heat transport. A compositional model of the Venusian lithosphere composed of a basaltic crust and peridotite mantle with or without tremolite was established. The thickness of the Venusian lithosphere with or without tremolite for Venus was calculated by combining the heat flow (from 20 to 80 mW/m2) at a certain depth (from 5 to 25 km) of crust, ranging from 24.4 to 184.6 km.

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Section: Implications For Physical Mechanisms Of Heat Transportmentioning

confidence: 99%

Thermal Conductivity and Thermal Diffusivity of Tremolite at High Temperature and Pressure and Implications for the Thermal Structure of the Venusian Lithosphere

et al. 2023

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Structural Interaction between BaO and Al₂O₃ in Aluminosilicate Slags

Chen,

He,

Yang

et al. 2024

steel research int.

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The effect of BaO and Al2O3 on the viscosity of SiO2–CaO–MgO–Al2O3–BaO slag from 1673 to 1873 K is studied by the rotating cylinder method. The structure of slag is examined by Raman spectroscopy and molecular dynamics simulation. In this study of viscosity, Al2O3 shows amphoteric oxide characteristics and BaO shows characteristics different from the basic oxide. The viscosity increases as the BaO increases from 2 to 4 wt% in the slag with CaO/SiO2 = 1.07. However, the viscosity decreases when the BaO content increases from 6 to 8 wt%. From molecular dynamics simulations and Raman analysis, the increase in BaO content leads to a greater aggregation of Al around Ba atoms and increases the number of Al–O bonds. This indicates that higher BaO content promotes the polymerization of the [AlO4] tetrahedral structure. Furthermore, a good quantitative relationship between viscosity and the ratio of Q3/Q2 of the Raman spectrum of the slag is observed.

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Effect of SiO2 and BaO/CaO Mass Ratio on Structure and Viscosity of B2O3-Containing CaF2–CaO–Al2O3-Based Slag for Electroslag Remelting of Rotor Steel

Wan

Shi

Huang

et al. 2022

Metall Mater Trans B

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Topological understanding of thermal conductivity in synthetic slag melts for energy recovery: An experimental and molecular dynamic simulation study

Cited by 13 publications

References 55 publications

Thermal Conductivity and Thermal Diffusivity of Tremolite at High Temperature and Pressure and Implications for the Thermal Structure of the Venusian Lithosphere

Thermal Conductivity and Thermal Diffusivity of Tremolite at High Temperature and Pressure and Implications for the Thermal Structure of the Venusian Lithosphere

Structural Interaction between BaO and Al₂O₃ in Aluminosilicate Slags

Effect of SiO2 and BaO/CaO Mass Ratio on Structure and Viscosity of B2O3-Containing CaF2–CaO–Al2O3-Based Slag for Electroslag Remelting of Rotor Steel

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Topological understanding of thermal conductivity in synthetic slag melts for energy recovery: An experimental and molecular dynamic simulation study

Cited by 13 publications

References 55 publications

Thermal Conductivity and Thermal Diffusivity of Tremolite at High Temperature and Pressure and Implications for the Thermal Structure of the Venusian Lithosphere

Thermal Conductivity and Thermal Diffusivity of Tremolite at High Temperature and Pressure and Implications for the Thermal Structure of the Venusian Lithosphere

Structural Interaction between BaO and Al2O3 in Aluminosilicate Slags

Effect of SiO2 and BaO/CaO Mass Ratio on Structure and Viscosity of B2O3-Containing CaF2–CaO–Al2O3-Based Slag for Electroslag Remelting of Rotor Steel

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Structural Interaction between BaO and Al₂O₃ in Aluminosilicate Slags