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Preparation, crystallization kinetics and cycled thermal performance of the steel slag-based glass ceramics.

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Title: Preparation, crystallization kinetics and cycled thermal performance of the steel slag-based glass ceramics.
Authors: Zhu, Chun1 (AUTHOR), Jiao, Lin-xu1 (AUTHOR), Li, Bao-rang1 (AUTHOR) libr@ncepu.edu.cn
Source: Ceramics International. Jun2026:Part A, Vol. 52 Issue 15, p28435-28452. 18p.
Subjects: Crystallization kinetics, Glass-ceramics, Microstructure, Thermocycling, Fabrication (Manufacturing), Thermal stability
Abstract: Steel slag-based glass ceramics were fabricated via a melting-sintering method using steel slag, SiO 2 and Al 2 O 3 as raw materials. Then the effects of SiO 2 -Al 2 O 3 addition on vitrification and crystallization kinetics of the as-prepared glass were analyzed by using the Kissinger-Akahira-Sunose equation, the Johnson-Mehl-Avrami equation, etc. The results showed that SiO 2 -Al 2 O 3 addition significantly lowers the melting point of the starting precursor and promotes the vitrification process. The lowest local crystallization activation energy, corresponding to the poorest thermal stability, is obtained in the parent glass with 30 wt% SiO 2 -Al 2 O 3 addition. For samples with 30-50 wt% SiO 2 -Al 2 O 3 addition, the local Avrami exponents are all greater than 1, indicating that the parent glasses follow a bulk nucleation mechanism. Moreover, as the SiO 2 -Al 2 O 3 content increases, the local Avrami exponent changes from 1.5-4.0 to 1.5-2.5, signifying a shift in the crystal growth mode from three-dimensional diffusion-controlled to one-dimensional interface-controlled growth. This transition alters the crystallized microstructure from equiaxed grains to dendrites. The formation of dendrites originates from Fe/Mn-bearing [SiO 4 ] tetrahedral nuclei. At temperatures above 830 °C, the rapidly detached [SiO 4 ] can periodically stack at the nuclei-glass interface to form chain-like structures, and connect with cation octahedra such as [CaO 6 ] along the chains to generate lateral protrusions, eventually growing into dendrites. Finally, thermal cycling tests on the obtained glass ceramics with various microstructures were also conducted. The results revealed that all the cycled samples exhibit good thermal stability with no significant changes in microstructures except a small alteration found in the sample with 40 wt% SiO 2 -Al 2 O 3 addition, which is likely associated with the thermal stress accumulated during thermal cycling. [ABSTRACT FROM AUTHOR]
Copyright of Ceramics International is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
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  Label: Title
  Group: Ti
  Data: Preparation, crystallization kinetics and cycled thermal performance of the steel slag-based glass ceramics.
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  Data: <searchLink fieldCode="AR" term="%22Zhu%2C+Chun%22">Zhu, Chun</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Jiao%2C+Lin-xu%22">Jiao, Lin-xu</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Bao-rang%22">Li, Bao-rang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> libr@ncepu.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Ceramics+International%22">Ceramics International</searchLink>. Jun2026:Part A, Vol. 52 Issue 15, p28435-28452. 18p.
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  Data: <searchLink fieldCode="DE" term="%22Crystallization+kinetics%22">Crystallization kinetics</searchLink><br /><searchLink fieldCode="DE" term="%22Glass-ceramics%22">Glass-ceramics</searchLink><br /><searchLink fieldCode="DE" term="%22Microstructure%22">Microstructure</searchLink><br /><searchLink fieldCode="DE" term="%22Thermocycling%22">Thermocycling</searchLink><br /><searchLink fieldCode="DE" term="%22Fabrication+%28Manufacturing%29%22">Fabrication (Manufacturing)</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+stability%22">Thermal stability</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Steel slag-based glass ceramics were fabricated via a melting-sintering method using steel slag, SiO 2 and Al 2 O 3 as raw materials. Then the effects of SiO 2 -Al 2 O 3 addition on vitrification and crystallization kinetics of the as-prepared glass were analyzed by using the Kissinger-Akahira-Sunose equation, the Johnson-Mehl-Avrami equation, etc. The results showed that SiO 2 -Al 2 O 3 addition significantly lowers the melting point of the starting precursor and promotes the vitrification process. The lowest local crystallization activation energy, corresponding to the poorest thermal stability, is obtained in the parent glass with 30 wt% SiO 2 -Al 2 O 3 addition. For samples with 30-50 wt% SiO 2 -Al 2 O 3 addition, the local Avrami exponents are all greater than 1, indicating that the parent glasses follow a bulk nucleation mechanism. Moreover, as the SiO 2 -Al 2 O 3 content increases, the local Avrami exponent changes from 1.5-4.0 to 1.5-2.5, signifying a shift in the crystal growth mode from three-dimensional diffusion-controlled to one-dimensional interface-controlled growth. This transition alters the crystallized microstructure from equiaxed grains to dendrites. The formation of dendrites originates from Fe/Mn-bearing [SiO 4 ] tetrahedral nuclei. At temperatures above 830 °C, the rapidly detached [SiO 4 ] can periodically stack at the nuclei-glass interface to form chain-like structures, and connect with cation octahedra such as [CaO 6 ] along the chains to generate lateral protrusions, eventually growing into dendrites. Finally, thermal cycling tests on the obtained glass ceramics with various microstructures were also conducted. The results revealed that all the cycled samples exhibit good thermal stability with no significant changes in microstructures except a small alteration found in the sample with 40 wt% SiO 2 -Al 2 O 3 addition, which is likely associated with the thermal stress accumulated during thermal cycling. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Ceramics International is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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        Value: 10.1016/j.ceramint.2026.04.373
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        Text: English
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      – SubjectFull: Microstructure
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      – SubjectFull: Fabrication (Manufacturing)
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      – SubjectFull: Thermal stability
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      – TitleFull: Preparation, crystallization kinetics and cycled thermal performance of the steel slag-based glass ceramics.
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            NameFull: Zhu, Chun
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              M: 06
              Text: Jun2026:Part A
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              Y: 2026
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