Crystallization and properties of high calcium glass-ceramics synthesized from ferromanganese slag

Chen, Lishun; Ge, Xuexiang; Long, Yuting; Zhou, Mingkai; Wang, Huaide; Chen, Xiao

doi:10.1016/j.jnoncrysol.2019.119864

Cited by 19 publications

(9 citation statements)

References 23 publications

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“…Zhang et al [9,10] studied the influence of B 2 O 3 / Al 2 O 3 ratio and Al/Na ratio on BFS glass-ceramics, and indicated that Al 2 O 3 improved the thermal stability of glass, meanwhile, the crystallization activation energy and network structure were also affected with the change of Al 2 O 3 content. Chen et al [11] also confirmed that, in the study of glass-ceramics with high calcium system, the crystallization activation energy rose and the main crystal phase changed from akermanite to gehlenite with the increase of Al 2 O 3 . Cheng et al [12] showed that the workability and kinetic fragility of glass were linked with the structure, with the increase of SiO 2 /Al 2 O 3 , the non-bridging oxygen in the glass network decreased, and the structure of the glass network became compact, resulting in the increase of the viscosity of the glass melt, meanwhile, the change of SiO 2 /Al 2 O 3 ratio were responsible for the increase of fragility.…”

Section: Introductionmentioning

confidence: 79%

“…The absorption peak in the range of 600 to 800 cm -1 was the symmetric stretching vibration of Si-O-Al, which was mainly attributed to the stretching vibration of the [AlO 4 ] and stretching vibration of the bridge oxygen bond in the glass network structure [11]. From A1 to A5, the vibration absorption peak near 720 cm -1 showed a small shift towards low wavenumbers, and the absorption intensity was enhanced, indicating that the Si-O-Al bond with lower vibration frequency in the glass network increased [23].…”

Section: Ftir Analysismentioning

confidence: 99%

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STRUCTURE AND PROPERTIES OF GLASS-CERAMICS FROM BLAST FURNACE SLAG WITH DIFFERENT A l₂O₃/S iO₂ RATIO

Li¹

2021

Ceramics - Silikaty

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Different Al 2 O 3 /SiO 2 glass-ceramics were prepared from blast furnace slag by sintering method. The structure and properties of glasses or glass-ceramics were investigated by DSC, XRD, SEM, FTIR, 27 Al MAS NMR. The DSC results showed that with the increase of Al 2 O 3 /SiO 2 , the glass transition temperature (T g ) first decreased and then increased, reached the minimum when Al 2 O 3 /SiO 2 was 0.34. The volume density, bending strength and microhardness of glass-ceramics also showed the same variation rule. Structural analysis showed that when the Al 2 O 3 /SiO 2 increased from 0.19 to 0.34, Q 2 gradually transformed into Q 1 and Q 3 ; when the Al 2 O 3 /SiO 2 continued to increase from 0.34 to 0.39, Q 1 and Q 3 decreased while Q 2 increased. The variation of [AlO 4 ] and [AlO 6 ] made the glass network structure the loosest when Al 2 O 3 /SiO 2 was 0.34. Gehlenite was the main crystalline phase in glass-ceramics, and with the increase of Al 2 O 3 /SiO 2 , the precipitation of gehlenite increased, while the precipitation of diopside and hyalophane decreased.

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Section: Introductionmentioning

confidence: 79%

Section: Ftir Analysismentioning

confidence: 99%

STRUCTURE AND PROPERTIES OF GLASS-CERAMICS FROM BLAST FURNACE SLAG WITH DIFFERENT A l₂O₃/S iO₂ RATIO

Li¹

2021

Ceramics - Silikaty

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“…Lishun Chen et al also con rmed that, in the study of glass-ceramics with high calcium system, the crystallization activation energy rose and the main crystal phase changed from akermanite to gehlenite with the increase of Al 2 O 3 [11]. Jinshu Cheng et al showed that the workability and kinetic fragility of glass were linked with the structure, with the increase of SiO 2 /Al 2 O 3 , the non-bridging oxygen in the glass network decreased, and the structure of the glass network became compact, resulting in the increase of the viscosity of the glass melt, meanwhile, the change of SiO 2 /Al 2 O 3 ratio were responsible for the increase of fragility [12].…”

Section: Introductionmentioning

confidence: 94%

“…In the infrared vibration spectra of glasses, the vibration absorption band in the range of 400-600 cm The absorption peak in the range of 600-800 cm − 1 was the symmetric stretching vibration of Si-O-Al, which was mainly attributed to the stretching vibration of the [AlO 4 ] and stretching vibration of the bridge oxygen bond in the glass network structure [11]. From A1 to A5, the vibration absorption peak near 720 cm − 1 showed a small shift towards low wavenumbers, and the absorption intensity was enhanced, indicating that the Si-O-Al bond with lower vibration frequency in the glass network increased [23].…”

Section: Ftir Analysismentioning

confidence: 99%

Effect of Al2O3/SiO2 on the structure and properties of blast furnace slag glass-ceramics

Zhang

et al. 2020

Preprint

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Different Al2O3/SiO2 glass-ceramics were prepared from blast furnace slag by traditional sintering method. The structure and properties of glasses or glass-ceramics were investigated by DSC, XRD, SEM, FTIR, 27Al MAS NMR. The DSC results showed that with the increase of Al2O3/SiO2, the glass transition temperature (Tg) first increased and then decreased, reached the minimum when Al2O3/SiO2 was 0.34. The volume density, bending strength and microhardness of glass-ceramics also showed the same variation rule. The FTIR and 27Al MAS NMR spectra results revealed this phenomenon. When Al2O3/SiO2 was 0.19, a large amount of Si4+ was added to the glass network to make the structure dense. With Al2O3/SiO2 increased from 0.24 to 0.34, the amount of [AlO6] in the glass increased while [AlO4] decreased, and the degree of network polymerization of the glass decreased; as Al2O3/SiO2 further increased from 0.34 to 0.39, [AlO4] increased and [AlO6] decreased in the glass, and the degree of network polymerization of the glass increased. The XRD results showed that the crystal phase of the glass-ceramics was composed of gehlenite, diopside and hyalophane. Moreover, with the increase of Al2O3/SiO2, the gehlenite content in the glass-ceramics increased, while the content of diopside and hyalophane decreased.

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“…The sintering method can make full use of the surface crystallisation of glass particles and prepare glass-ceramics with a high crystal phase content. However, the higher basicity of BFS leads to fast crystallisation, and the precipitation of a crystal phase on the surface of the glass particles hinders the sintering process, which is not conducive to the densification of glass-ceramics and the improvement of their properties [12]. Therefore, it is necessary to study the sinterability of glass.…”

Section: Introductionmentioning

confidence: 99%

SINTERING MECHANISM, STRUCTURE AND CRYSTALLISATION OF CaO-MgO-Al₂O₃-SiO₂GLASS-CERAMICS FROM BLAST FURNACE SLAG

Fan¹

2021

Ceramics - Silikaty

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CaO-MgO-Al 2 O 3 -SiO 2 glass-ceramics with different amounts of ZnO from blast furnace slag were prepared using the sintering method. The structure and properties of the glasses or glass-ceramics were investigated by Raman, DSC, HSM, XRD, and FE-SEM. The T g and T c of the glass decreased with an increase in the ZnO amount. As the ZnO content increased from 2 wt. % to 4 wt. %, the E a of the glass decreased and the sinterability increased, while with any further increase in the ZnO content, the sinterability decreased. The Raman analysis showed that when the ZnO content was 4 wt. %, the adjustment of the glass structure was obvious. The relative area of Q 0 and Q 2 reached the maximum, and Q 1 and Q 3 reached the minimum, meanwhile, the main structure of the glass changed from Q 1 to Q 2 . The main crystal phase of the glass-ceramics was akermanite; ZnO promoted the precipitation of akermanite, but inhibited the precipitation of diopside. With the increase in the ZnO content, the bulk density of the glass-ceramics increased while the flexural strength and microhardness decreased.

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Crystallization and properties of high calcium glass-ceramics synthesized from ferromanganese slag

Cited by 19 publications

References 23 publications

STRUCTURE AND PROPERTIES OF GLASS-CERAMICS FROM BLAST FURNACE SLAG WITH DIFFERENT A l₂O₃/S iO₂ RATIO

STRUCTURE AND PROPERTIES OF GLASS-CERAMICS FROM BLAST FURNACE SLAG WITH DIFFERENT A l₂O₃/S iO₂ RATIO

Effect of Al2O3/SiO2 on the structure and properties of blast furnace slag glass-ceramics

SINTERING MECHANISM, STRUCTURE AND CRYSTALLISATION OF CaO-MgO-Al₂O₃-SiO₂GLASS-CERAMICS FROM BLAST FURNACE SLAG

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