CAJ | 학술논문

利用高炉渣、尾矿和粉煤灰各自成分特点,在未添加任何晶核剂和其他化学试剂条件下,使用烧结法制得了不同CaO/SiO2质量比的10%Al2 O3(质量分数)矿渣微晶玻璃.通过差热分析、X射线衍射、扫描电子显微镜等分析手段,分析了CaO/SiO2质量比和析晶温度对高炉渣-尾矿-粉煤灰微晶玻璃样品的晶相变化规律、析晶行为和主要力学性能的影响.随着CaO/SiO2质量比增大,析晶活化能不断减小,Si-O四面体连接强度下降,质点移动加强,各组开始析晶温度和晶化温度逐渐减小.当玻璃样品中钙硅氧化物的质量比为0.4时,分别在886℃和982℃形核、析晶保温1 h 后,可以得到抗折强度103.59 MPa、显微硬度5.3 GPa、耐酸性0.25%(质量损失率)、耐碱性小于0.1%,主晶相为透辉石的最佳力学性能的微晶玻璃样品.
이용고로사、미광화분매회각자성분특점,재미첨가임하정핵제화기타화학시제조건하,사용소결법제득료불동CaO/SiO2질량비적10%Al2 O3(질량분수)광사미정파리.통과차열분석、X사선연사、소묘전자현미경등분석수단,분석료CaO/SiO2질량비화석정온도대고로사-미광-분매회미정파리양품적정상변화규률、석정행위화주요역학성능적영향.수착CaO/SiO2질량비증대,석정활화능불단감소,Si-O사면체련접강도하강,질점이동가강,각조개시석정온도화정화온도축점감소.당파리양품중개규양화물적질량비위0.4시,분별재886℃화982℃형핵、석정보온1 h 후,가이득도항절강도103.59 MPa、현미경도5.3 GPa、내산성0.25%(질량손실솔)、내감성소우0.1%,주정상위투휘석적최가역학성능적미정파리양품.
ABSTRACT Blast furnace slag, tailing and coal fly ash were used as starting materials for preparing glass-ceramics by the sintering method based on their characteristics and without adding any other nucleating and chemical agents. The effects of CaO/SiO2 mass ratio and crystallization temperature on the crystaltransition, crystallization behavior and main mechanical properties of slag glass-ceramics with 10% Al2 O3 were systematically investigated by differential thermal analysis, X-ray diffraction and scanning electron microscopy. When the CaO/SiO2 mass ratio increases, the crystallization activation energy decreases, the Si—O tetrahedral bonding strength de-creases, the particle movement strengthens, and the crystallization onset temperature and the crystallization temperature decrease. The glass samples with a CaO/SiO2 mass ratio of 0.4, sintered at 886℃ for 1 h as a nucleation process and at 982℃ for 1 h as a crystalli-zation process, possess the best performance with the bending strength of 103.59 MPa, the microhardness of 5.3 GPa and the acid and alkali resistances of 0.25% and<0.1% ( mass loss rate) respectively. Moreover, the major phase of the glass ceramics is diopside.