以白云鄂博西尾矿和粉煤灰为主要原料,采用熔融法制备了添加0～2.0wt％ Cr2O3的CaO-MgO-SiO2-Al2O3系微晶玻璃,利用DTA、XRD、FESEM、EDS和综合力学性能仪等测试手段,研究了Cr2O3含量对该体系微晶玻璃显微结构及性能的影响.实验结果表明:少量Cr2O3 (0.5wt％)可有效降低样品的晶化温度,促进主晶相辉石相(Ca(Mg,Fe,Al) (Si,Al)2O6)的形成,同时细化其显微组织,从而提高样品的密度、抗折强度和耐酸碱性;当Cr2O3含量大于等于1.5wt％时,析晶峰温度由804℃提高到816℃,同时微晶玻璃中形成不规则块状结构的镁铁铬尖晶石(MgFeo.9 Cr1.1O4)第二相,并进而引起周围辉石相晶粒异常长大,降低其抗折强度.
参考文献
| [1] | 杜永胜,李保卫,张雪峰,贾晓琳,陈华,赵鸣,邓磊波.铁含量及价态对白云鄂博尾矿微晶玻璃析晶特性及性能的影响[J].人工晶体学报,2013(10):2170-2176. |
| [2] | Li Baowei;Deng Leibo;Zhang Xuefeng;Jia Xiaolin.Structure and performance of glass-ceramics obtained by Bayan Obo tailing and fly ash[J].Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites,2013:103-108. |
| [3] | Tuan Zhao;Bao Wei Li;Zhan Yong Gao;Da Qiang Chang .The utilization of rare earth tailing for the production of glass-ceramics[J].Materials Science & Engineering, B. Solid-State Materials for Advanced Technology,2010(1/3):22-25. |
| [4] | 田清波,徐丽娜,岳雪涛,王修慧,高宏.P2O5对CaO-MgO-Al2O3-SiO2系微晶玻璃析晶的影响[J].人工晶体学报,2008(01):208-212. |
| [5] | 李保卫,杜永胜,张雪峰,贾晓琳,陈华,赵鸣,邓磊波.基础成分配比对白云鄂博尾矿微晶玻璃结构及性能的影响[J].人工晶体学报,2012(05):1391-1398. |
| [6] | Van P;Papenfuss C;Muschik W .Griffith cracks in the mesoscopic microcrack theory[J].Journal of Physics.A.Mathematical and General:A Europhysics Journal,2004(20):5315-5328. |
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