人工晶体学报2012，Vol.41Issue(5)：1391-1398,8.
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
Influence of Basic Composition Ratio on Structure and Properties of Slag Glass-Ceramics Prepared by Baiyunebo Tailing
摘要
Abstract
Glass-ceramic of CaO-MgO-Al2O3-SiO2 quaternary system was successfully produced by melting method, using Baiyunebo tailing and fly ash as raw materials. The glass-ceramics process included glass melting, annealing, nucleation stage and crystallization stage, etc. The appropriate production process parameters were as follows. Glass melting temperature was 1450 ℃. Nucleation temperature was 720 ℃ and crystallization temperature was 850 ℃. The influences of basic composition ratio on the structure of the glass-ceramics have been investigated by X-ray diffraction ( XRD). The results indicated that the type of phase formation in the crystallization process depended on the kind of coordinated basic elements. The dominant crystalline phase can be formed as augite, anorthite, magnesioferrite or magnetite with the different basic composition ratio. The main crystalline phase can be changed from well crystallized augite to poor crystallized magnesioferrite and anorthite with the decrease of CaO/MgO and CaO/Al2O3 ratio. Meanwhile, it was found that the predominant crystalline phase was change from augite to magnetite when the ratio of SiO2/CaO exceeded 2. DTA results show that as the CaO increasing, the crystallization temperature of as-cast glasses are shifted to lower temperatures. However, the crystallization temperature are shift to higher temperatures with the increase of MgO, Al2O3 and SiO2. Mechanical measurements showed that bending strengths, density and chemical durability of glass-ceramics were related to the crystalline phase. The samples with augite crystalline phase have higher value of bending strengths, density and acid-resistance compared with other samples.关键词
微晶玻璃/辉石相/镁铁尖晶石相/钙长石相/磁铁矿相/力学性能Key words
glass-ceramic/ augite/ magnesioferrite/ anorthite/ magnetite/ mechanical properties分类
信息技术与安全科学引用本文复制引用
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,2012,41(5):1391-1398,8.基金项目
国家重点基础研究发展计划(973计划)(2012CB722802) （973计划）
内蒙古创新引导基金(20111623) （20111623）
