EFFECT OF CaO/SiO₂ AND HEAT TREATMENT ON THE MICROSTRUCTURE OF GLASS-CERAMICS FROM BLAST FURNACE SLAG
Glass-ceramics, with molten blast furnace (BF) slag as the major raw material, were prepared successfully by the melting method. The effect of the CaO/SiO₂ ratio in the molten BF slag and heat treatment on the viscosity and microstructure of glass-ceramics produced from BF slag were traced using the...
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University of Chemistry and Technology, Prague
2016-05-01
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doaj-8342c3b9cb804cc0814a1f5afbd8a0f22020-11-24T21:04:03ZengUniversity of Chemistry and Technology, PragueCeramics-Silikáty0862-54681804-58472016-05-0160214615110.13168/cs.2016.002210.13168/cs.2016.0022.20160731184845EFFECT OF CaO/SiO₂ AND HEAT TREATMENT ON THE MICROSTRUCTURE OF GLASS-CERAMICS FROM BLAST FURNACE SLAGChunshai Xie0Yongliang Gui1Song Chunyan2Hu Binsheng3 College of Metallurgy and Energy, North China University of Science and Technology, Tangshan, 063000, China College of Metallurgy and Energy, North China University of Science and Technology, Tangshan, 063000, China College of Metallurgy and Energy, North China University of Science and Technology, Tangshan, 063000, China College of Metallurgy and Energy, North China University of Science and Technology, Tangshan, 063000, China Glass-ceramics, with molten blast furnace (BF) slag as the major raw material, were prepared successfully by the melting method. The effect of the CaO/SiO₂ ratio in the molten BF slag and heat treatment on the viscosity and microstructure of glass-ceramics produced from BF slag were traced using the melt property tester, DSC, XRD and SEM. The results showed that increasing the CaO/SiO₂ ratio of BF slag caused a decrease not only in the viscosity of the BF slag at high temperature but also in the nucleation and crystallization temperature for the preparation of glass-ceramics. The content of akermanite-gehlenite increased as the CaO/SiO₂ ratio increased from 0.30 to 0.63. With increasing nucleation and crystallization temperature, the crystalline phases remain unchanged, but the crystal shape changes from granular to flaky. The optimum CaO/SiO₂ ratio was found to be 0.44, resulting in diopside as the main crystalline phase, augite as the secondary crystalline phase and a small mount of akermanite-gehlenite after appropriate heat treatment i.e. nucleation at 775°C and crystallization at 920°C. http://www.ceramics-silikaty.cz/index.php?page=cs_detail_doi&id=156 Glass-ceramics Blast furnace slag Viscosity Crystalline phase Microstructure |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Chunshai Xie Yongliang Gui Song Chunyan Hu Binsheng |
spellingShingle |
Chunshai Xie Yongliang Gui Song Chunyan Hu Binsheng EFFECT OF CaO/SiO₂ AND HEAT TREATMENT ON THE MICROSTRUCTURE OF GLASS-CERAMICS FROM BLAST FURNACE SLAG Ceramics-Silikáty Glass-ceramics Blast furnace slag Viscosity Crystalline phase Microstructure |
author_facet |
Chunshai Xie Yongliang Gui Song Chunyan Hu Binsheng |
author_sort |
Chunshai Xie |
title |
EFFECT OF CaO/SiO₂ AND HEAT TREATMENT ON THE MICROSTRUCTURE OF GLASS-CERAMICS FROM BLAST FURNACE SLAG |
title_short |
EFFECT OF CaO/SiO₂ AND HEAT TREATMENT ON THE MICROSTRUCTURE OF GLASS-CERAMICS FROM BLAST FURNACE SLAG |
title_full |
EFFECT OF CaO/SiO₂ AND HEAT TREATMENT ON THE MICROSTRUCTURE OF GLASS-CERAMICS FROM BLAST FURNACE SLAG |
title_fullStr |
EFFECT OF CaO/SiO₂ AND HEAT TREATMENT ON THE MICROSTRUCTURE OF GLASS-CERAMICS FROM BLAST FURNACE SLAG |
title_full_unstemmed |
EFFECT OF CaO/SiO₂ AND HEAT TREATMENT ON THE MICROSTRUCTURE OF GLASS-CERAMICS FROM BLAST FURNACE SLAG |
title_sort |
effect of cao/sio₂ and heat treatment on the microstructure of glass-ceramics from blast furnace slag |
publisher |
University of Chemistry and Technology, Prague |
series |
Ceramics-Silikáty |
issn |
0862-5468 1804-5847 |
publishDate |
2016-05-01 |
description |
Glass-ceramics, with molten blast furnace (BF) slag as the major raw material, were prepared successfully by the melting method. The effect of the CaO/SiO₂ ratio in the molten BF slag and heat treatment on the viscosity and microstructure of glass-ceramics produced from BF slag were traced using the melt property tester, DSC, XRD and SEM. The results showed that increasing the CaO/SiO₂ ratio of BF slag caused a decrease not only in the viscosity of the BF slag at high temperature but also in the nucleation and crystallization temperature for the preparation of glass-ceramics. The content of akermanite-gehlenite increased as the CaO/SiO₂ ratio increased from 0.30 to 0.63. With increasing nucleation and crystallization temperature, the crystalline phases remain unchanged, but the crystal shape changes from granular to flaky. The optimum CaO/SiO₂ ratio was found to be 0.44, resulting in diopside as the main crystalline phase, augite as the secondary crystalline phase and a small mount of akermanite-gehlenite after appropriate heat treatment i.e. nucleation at 775°C and crystallization at 920°C. |
topic |
Glass-ceramics Blast furnace slag Viscosity Crystalline phase Microstructure |
url |
http://www.ceramics-silikaty.cz/index.php?page=cs_detail_doi&id=156
|
work_keys_str_mv |
AT chunshaixie effectofcaosio2andheattreatmentonthemicrostructureofglassceramicsfromblastfurnaceslag AT yonglianggui effectofcaosio2andheattreatmentonthemicrostructureofglassceramicsfromblastfurnaceslag AT songchunyan effectofcaosio2andheattreatmentonthemicrostructureofglassceramicsfromblastfurnaceslag AT hubinsheng effectofcaosio2andheattreatmentonthemicrostructureofglassceramicsfromblastfurnaceslag |
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