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Chen W.-Q.,Jiuquan New Energy Research Institute | Li Y.-H.,Jiuquan New Energy Research Institute | Xu S.-P.,Jiuquan New Energy Research Institute | Lin L.,Jiuquan New Energy Research Institute | And 2 more authors.
Rengong Jingti Xuebao/Journal of Synthetic Crystals | Year: 2015

CaO-Al2O3-SiO2 glass-ceramics were prepared by melting method using gold tailings as the main raw materials, and calcite, borax as auxiliary materials. The phases, thermal properties and microstructures of the as-prepared samples were characterized by XRD, DSC and SEM. The effects of TiO2 and Cr2O3 as crystal nucleus on crystallization of glass-ceramics samples from gold tailings were investigated, respectively. The results show that only the surface of the samples crystallize a lot of crystal, and it crystallized from surface to the inside when using 2% TiO2 as crystal nucleus. The inside of the samples crystallized a little crystal when uisng 4% TiO2 as crystal nucleus. The inside of the samples crystallizes a little reunion crystals when using the 2% Cr2O3 as crystal nucleus. The inside of the samples crystallizes a lot of particle crystals when using 2% TiO2 and 2%Cr2O3 as composite crystal nucleus, and it is greatly improved the overall crystallization ability of the glass-ceramics. The main crystalline phase is diopside (CaMgSi2O3), and the secondary crystalline phase is Anorthite (CaAl2Si2O8). ©, 2015, Rengong Jingti Xuebao/Journal of Synthetic Crystals. All right reserved.

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