CaO-Al_2O_3-SiO_2系粉煤灰微晶玻璃的制备及其性能  

Preparation and properties of CaO-Al_2O_3-SiO_2 glass-ceramics from fly ash by sintering

作　　者：汪振双[1] 苏昊林[2] 周梅[3] 

机构地区：[1]东北财经大学投资工程管理学院,辽宁大连116025 [2]伯明翰大学土木工程学院 [3]辽宁工程技术大学建筑工程学院,辽宁阜新123000

出　　处：《材料热处理学报》2016年第1期29-33,共5页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(U1261122);第八批博士后特别资助(2015T80259);辽宁省教育厅基金(W2015130);东北财经大学博士后资助项目(BSH201523);东北财经大学青年科研培育项目(DUFE2015Q15)

摘　　要：以粉煤灰为主要原料,Si O2、Na2CO3、Mg O、Ca O、Zn O、Ca F、硼酸等为辅助原料,采用两步烧结法制备Ca O-Al2O3-Si O2系粉煤灰微晶玻璃。通过差热分析、X射线衍射和扫描电镜等分析测试方法对所制备粉煤灰微晶玻璃的微观结构和性能进行了研究,并利用修正的Johnson-Mehl-Avrami方程和Augis-Bennett方程计算了粉煤灰微晶玻璃析晶活化能和晶化指数。结果表明,不同配方的粉煤灰微晶玻璃均为体积晶化,主晶相为副硅灰石,呈短柱状,为单斜晶系;副晶相为钙长石,为三斜晶系;在5组配方中,Ca O/Si O2为0.33时,粉煤灰微晶玻璃的性能相对较优,Al2O3/Si O2为0.19时,粉煤灰微晶玻璃的活化能相对较小小,析晶过程容易发生。CaO-Al2O3-Si O2glass-ceramics were prepared with fly ash as main raw materials,and Si O2,Na2CO3,Mg O,Ca O,Zn O and Ca F as auxiliary materials by a sintering method. Microstructure and properties of the fly ash glass-ceramics were characterized by differential scanning calorimeter,X-ray differential and scanning electron microscopy,respectively. Moreover,according to modified Johnson-MehlAvrami equation and Augis-Bennett function,the activity energy of crystallization,crystallization kinetics parameter,and crystallization parameter of the glass-ceramics were calculated, respectively. The results show that all sample ＇s crystallization process are bulk crystallization,the main crystal phase is wollastonite,and vice crystal phase is anorthite. Glass-ceramics researched the best mechanicchemistry properties with Ca O / Si O2 at 0. 33,and the activity energy of crystallization research the lowest value with Al2O3/ Si O2 at 0. 19.

关 键 词：粉煤灰 烧结法 CAO-AL2O3-SIO2系微晶玻璃 性能 

分 类 号：TB332[一般工业技术—材料科学与工程] TQ171[化学工程—玻璃工业]