Effects of SiO2 and B2O3 on MgO solubility and ionic structure in MgO-and-spinel doubly saturated aluminate slag

Cheol Min Yoon; Youngjoo Park; Dong Joon Min

doi:10.1016/j.ceramint.2020.04.002

Effects of SiO₂ and B₂O₃ on MgO solubility and ionic structure in MgO-and-spinel doubly saturated aluminate slag

Cheol Min Yoon, Youngjoo Park, Dong Joon Min

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

The effects of SiO₂ and B₂O₃ on the ionic structure of CaO–Al₂O₃ binary slag under the MgO-and-spinel doubly saturated (MSDS) condition were evaluated by measuring the MgO solubility of the slag. The activity coefficient of AlO₄ ⁵⁻ in the slag was deduced by evaluating the equilibrium constant of the ionic reaction. In addition, the proportion of each bridging oxygen (BO) linkage species and the enthalpy of solution with the 4-coordinate Al ion (⁴Al) were derived by combining the Al avoidance model with the ¹¹B and ²⁷Al magic angle spinning nuclear magnetic resonance spectra results. The enthalpies, activity coefficient of AlO₄ ⁵⁻, and enthalpy of the solution with ⁴Al had good agreement in BO-dominant regions. From these results, the effects of the structural properties of slag on the stability of AlO₄ ⁵⁻ and MgO solubility in the MgO-and-spinel doubly saturated slag were investigated in detail.

Original language	English
Pages (from-to)	17062-17075
Number of pages	14
Journal	Ceramics International
Volume	46
Issue number	10
DOIs	https://doi.org/10.1016/j.ceramint.2020.04.002
Publication status	Published - 2020 Jul

Bibliographical note

Publisher Copyright:
© 2020 Elsevier Ltd and Techna Group S.r.l.

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Process Chemistry and Technology
Surfaces, Coatings and Films
Materials Chemistry

Access to Document

10.1016/j.ceramint.2020.04.002

Cite this

@article{28f63a381225439ca28aa0904cac13fa,

title = "Effects of SiO2 and B2O3 on MgO solubility and ionic structure in MgO-and-spinel doubly saturated aluminate slag",

abstract = "The effects of SiO2 and B2O3 on the ionic structure of CaO–Al2O3 binary slag under the MgO-and-spinel doubly saturated (MSDS) condition were evaluated by measuring the MgO solubility of the slag. The activity coefficient of AlO4 5− in the slag was deduced by evaluating the equilibrium constant of the ionic reaction. In addition, the proportion of each bridging oxygen (BO) linkage species and the enthalpy of solution with the 4-coordinate Al ion (4Al) were derived by combining the Al avoidance model with the 11B and 27Al magic angle spinning nuclear magnetic resonance spectra results. The enthalpies, activity coefficient of AlO4 5−, and enthalpy of the solution with 4Al had good agreement in BO-dominant regions. From these results, the effects of the structural properties of slag on the stability of AlO4 5− and MgO solubility in the MgO-and-spinel doubly saturated slag were investigated in detail.",

keywords = "Corrosion (C), MgO (D), Refractories (E), Spinels (D)",

author = "Yoon, {Cheol Min} and Youngjoo Park and Min, {Dong Joon}",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd and Techna Group S.r.l.",

year = "2020",

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doi = "10.1016/j.ceramint.2020.04.002",

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T1 - Effects of SiO2 and B2O3 on MgO solubility and ionic structure in MgO-and-spinel doubly saturated aluminate slag

AU - Yoon, Cheol Min

AU - Park, Youngjoo

AU - Min, Dong Joon

PY - 2020/7

Y1 - 2020/7

N2 - The effects of SiO2 and B2O3 on the ionic structure of CaO–Al2O3 binary slag under the MgO-and-spinel doubly saturated (MSDS) condition were evaluated by measuring the MgO solubility of the slag. The activity coefficient of AlO4 5− in the slag was deduced by evaluating the equilibrium constant of the ionic reaction. In addition, the proportion of each bridging oxygen (BO) linkage species and the enthalpy of solution with the 4-coordinate Al ion (4Al) were derived by combining the Al avoidance model with the 11B and 27Al magic angle spinning nuclear magnetic resonance spectra results. The enthalpies, activity coefficient of AlO4 5−, and enthalpy of the solution with 4Al had good agreement in BO-dominant regions. From these results, the effects of the structural properties of slag on the stability of AlO4 5− and MgO solubility in the MgO-and-spinel doubly saturated slag were investigated in detail.

AB - The effects of SiO2 and B2O3 on the ionic structure of CaO–Al2O3 binary slag under the MgO-and-spinel doubly saturated (MSDS) condition were evaluated by measuring the MgO solubility of the slag. The activity coefficient of AlO4 5− in the slag was deduced by evaluating the equilibrium constant of the ionic reaction. In addition, the proportion of each bridging oxygen (BO) linkage species and the enthalpy of solution with the 4-coordinate Al ion (4Al) were derived by combining the Al avoidance model with the 11B and 27Al magic angle spinning nuclear magnetic resonance spectra results. The enthalpies, activity coefficient of AlO4 5−, and enthalpy of the solution with 4Al had good agreement in BO-dominant regions. From these results, the effects of the structural properties of slag on the stability of AlO4 5− and MgO solubility in the MgO-and-spinel doubly saturated slag were investigated in detail.

KW - Corrosion (C)

KW - MgO (D)

KW - Refractories (E)

KW - Spinels (D)

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