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Title: SINTERED GLASS-CERAMICS, SELF-GLAZED MATERIALS AND FOAMS FROM METALLURGICAL SLAG
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SINTERED GLASS-CERAMICS, SELF-GLAZED MATERIALS AND FOAMS FROM METALLURGICAL SLAG
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1314-2704
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English
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21
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4.1
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• Prof. DSc. Oleksandr Trofymchuk, UKRAINE
• Prof. Dr. hab. oec. Baiba Rivza, LATVIA |
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The materials used for the synthesis are modified waste raw materials in the form of slags (up to 70 % wt.) with addition of quartz sand and calcium fluoride. The initial batch is being melted at 1400 oC and then quenched in water. The resulting glass frit is milled bellow 75 microns, pressed into “green” samples being exposed in a next stage to thermal scanning at different temperatures with different heating rates, holding temperatures and times.
In the framework of present investigation is presented analysis of the possibilities to obtain new glass-ceramic materials by in-situ densification and foaming using customized optical Hot-Stage Microscopic (HSM) experimental setup. Additionally, analysis of the performed physical-chemical characterization of the obtained species presented here is carried out. These experiments with the new materials consist of measurements of the sintering curves, optical analysis of the volume shrinkage and volume expansion; Scanning Electron Microscopy (SEM); Energy Dispersion Spectroscopy (EDS); 3-D Computed Tomography (CT) and X-Ray Diffraction Spectroscopy (XRD). The highlighted method of production described here allows the in-situ synthesis of three types of new materials on demand by the corresponding industrial needs by using the same pressed glass powders. It is demonstrated a flexibility of the synthesis obtaining namely well densified glass-ceramics at temperatures of 900 oC or self-glazed glass-ceramics at 1000 oC or glass-ceramic foams at 1100 oC. The first set of materials is characterized by dense structure and good mechanical properties, the second one - by fine smooth “commercial” surface and the third one- by very low specific weight, 70-80 % closed porosity and good thermal stability above 1000 oC. |
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conference
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21st International Multidisciplinary Scientific GeoConference SGEM 2021
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21st International Multidisciplinary Scientific GeoConference SGEM 2021, 16 - 22 August, 2021
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Proceedings Paper
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STEF92 Technology
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SGEM International Multidisciplinary Scientific GeoConference
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SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Serbian Acad Sci & Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts & Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci
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175-182
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16 - 22 August, 2021
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website
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cdrom
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8069
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foams; waste materials; sintering; hot-stage microscopy
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