Fe_2O_3对CaO-Al_2O_3-MgO-SiO_2系微晶玻璃析晶及断裂特性的影响  

Effect of Fe_2O_3 on Crystallization and Fracture Characteristics of CaO-Al_2O_3-MgO-SiO_2 Glass-ceramics

作　　者：杜永胜[1] 杨晓薇[1] 张红霞[1] 陈华[1] 张雪峰[1] 赵鸣[2] 欧阳顺利[2] 李保卫[2] 

机构地区：[1]内蒙古科技大学理学院,包头014010 [2]内蒙古科技大学白云鄂博矿多金属资源综合利用重点实验室,包头014010

出　　处：《人工晶体学报》2016年第10期2472-2477,共6页Journal of Synthetic Crystals

基　　金：内蒙古自然科学基金(2014MS0106);国家自然科学基金(11564031);国家重点基础研究发展计划(973)(2012CB722802)

摘　　要：采用熔融法,利用纯化学试剂制备了Ca O-Al2O3-Mg O-SiO_2(CAMS)系微晶玻璃,利用DTA、XRD、拉曼光谱仪等研究了Fe_2O_3对微晶玻璃析晶特性的影响规律,微晶玻璃的物化性能由抗折强度、杨氏模量、剪切模量、泊松比、维氏硬度等进行评价。结果表明,微晶玻璃的析晶特性随着Fe_2O_3含量的增加而增强,对应母体玻璃中首先出现富铁相,进而促进辉石主晶相的析出。微晶玻璃的断裂特性及裂纹扩展方式均随析晶度的提高得到明显改善。但过量的Fe_2O_3添加则对微晶玻璃的析晶特性无明显影响,反而降低了玻璃相的致密性。微晶玻璃的耐酸性、抗折强度、杨氏模量及剪切模量均呈现先增加后降低的趋势,微晶玻璃的Fe_2O_3含量为6.6wt%时综合性能最优。CaO-Al2O3-MgO-SiO2（CAMS） glass-ceramics were prepared by melting method using pure chemical reagent as raw materials. The effects of Fe2O3 on the crystallization characteristics of glass-ceramics were confirmed by DTA, XRD and Raman spectra. The properties of glass ceramics were evaluated by bending strength, Young＇s modulus, shear modulus, Poisson＇s ratio and Vickers hardness. The results show that the crystallization behavior of the glass-ceramics enhance as the Fe2O3 content increasing. The Fe-rich phase can be first found to occur in parent glass, and the Fe-rich phase provide the core of heterogeneous nucleation for the consequent precipitation of augite crystalline. The fracture characteristics and crack propagation process of the glass-ceramics improve obviously as the crystallization degree increasing. Excessive adding Fe2O3 have no effect on the crystallization behavior of glass- ceramics, the compactness of glass phase is reduced. Correspondingly, the acid resistance, bending strength, Youngs modulus and shear modulus of the glass-ceramics first increase and then decrease. The best performance of the glass-ceramic can be obtained as iron oxide content is 6.6wt% .

关 键 词：微晶玻璃 析晶特性 FE2O3 维氏硬度 断裂特性 

分 类 号：TQ171[化学工程—玻璃工业]