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Date of Award
Thesis - Pacific Access Restricted
Master of Science (M.S.)
First Committee Member
Second Committee Member
Blast furnace slag (BFS), iron ore tailings (IOT), and coal fly ash (CFA) are common industrial by-products with huge annual yield and low reuse rate (< 30%). This research was intended to prepare high performance glass-ceramics from these three industrial by-products. What's more, two energy saving methods were put forward. One was application of single-stage heat treatment, another was mixing cold solid raw material (IOT, CFA) with melted BFS discharged at 1500 in iron making process instead of mixing all the raw material in room temperature and then heating them to melt. Different binary basicity (MCaO /MSiO2 ) and content of Al2O3 had been studied to determine the best formula for high performance glass-ceramic in terms of mechanical properties. Sample 04 (MCaO /MSiO2 =0.4, Al2O3 wt. %=9%) and Sample 05Al-2 (MCaO /MSiO2 =0.5, Al2O3 wt. %=12%) were found with the highest bending strength, 94 MPa and 89 MPa respectively. In addition, with augite and diopside as primary crystalline phase, they also had a Vickers micro-hardness of 6.2 GPa and 6.3 GPa. When applied single-stage heat treatment, sample H4 obtained a bending strength of 77.89MPa and Vickers micro-hardness of 6.5 GPa, very close to H0. Meanwhile, when applied hot liquid-cold solid mixing method, M3 obtained a bending strength of 80.51 MPa, also very close to M0. Which indicates that these two energy saving method are all feasible to be applied to prepare high performance glass-ceramic.
Ma, Haoyuan. (2014). Study on preparation of high performance CaO-MgO-Al2O3-SiO2 system glass-ceramic with industrial by-products. University of the Pacific, Thesis - Pacific Access Restricted. https://scholarlycommons.pacific.edu/uop_etds/221
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