以不锈钢渣、废玻璃为原料,采用熔融法制备了主晶相为硅灰石相的微晶玻璃。利用DSC、XRD、SEM等测试分析手段研究了CaO/SiO2质量比对微晶玻璃物相组成、显微结构及理化性能的影响。结果表明:随Ca0/SiO2质量比增加,玻璃转变温度和析晶放热峰温度逐渐降低,且析晶放热峰变尖锐;硅灰石相XRD衍射峰强度先增强后减弱;显微结构由表面析晶向整体析晶过渡,晶粒形状由球形颗粒变为针叶状晶,最后发育成片状晶,晶体尺寸先增加后减小;当CaO/SiO2质量比为0.72时微晶玻璃性能达到较优,显微硬度为6.49GPa,密度为3.1lg/cm3,吸水率为0.11%,耐酸性96.51%,耐碱性99.92%。制备出的微晶玻璃有望应用在建筑装饰材料领域。
The glass-ceramics were prepared with stainless steel slag and waste glass by melting method, the major crystalline phase was a wollastonite. The effect of mass ratio of CaO/SiO2 on crystalline phases, mierostructure and properties of glass-ceramics was investigated by differential scanning calorimeter (DSC), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results showed that with the increase of mass ratio of CaO/SiO2, the glass transition temperature and crystallization exothermic peak temperature decreased gradually, crystallization exo- therrnic peak temperature became sharp; the XRD diffraction peak intensity of wollastonite increased and afterward de- creased; the crystallization changed from surface crystallization to overall crystallization gradually, the morphology changed from spherical grains to needles crystal and finally grew to plate structure, the grain size became larger then smaller. The optimal properties were achieved at mass ratio of CaO/SiO2 was 0. 72, with microhardness of 6. 49 GPa, bulk density of 3.11 g/cms, water absorption of 0. 11% ,acid resistance of 96.51% and alkali resistance of 99.92%. The prepared glass-ceramics may be applicated in the field of building decoration materials.