(大连交通大学 材料科学与工程学院，大连 116028)
摘 要: 以废玻璃与钙铝黄长石为主要原料，添加氟化钙通过反应析晶烧结法制得掺氟化钙硅灰石玻璃陶瓷。采用X射线粉末衍射(XRD)、扫描电镜(SEM)、高分辨透射电镜(HRTEM)、差式扫描量热分析(DSC)等对其进行表征，根据样品在不同升温速率下的差热曲线，分别采用FWO、Kissinger、Friedman和K值法对其进行析晶动力学的研究。结果表明：样品主晶相为硅灰石，颗粒呈板条状。四种动力学分析方法计算出掺氟化钙硅灰石玻璃陶瓷的析晶活化能分别为117.4、102.8、110.5、100.4 kJ/mol，结果较为接近。与未掺氟化钙的硅灰石玻璃陶瓷相比，掺入少量的氟化钙即可降低硅灰石玻璃陶瓷的析晶活化能，说明氟化钙有利于玻璃相的黏性流动，具有较强的促进玻璃析晶能力，有助于硅灰石玻璃陶瓷的制备。
关键字: 硅灰石; 玻璃陶瓷; 氟化钙; 析晶动力学
（School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, China）
Abstract:The wollastonite glass ceramics doped calcium fluoride was prepared by reaction crystallization sintering using waste glass and gehlenite as main raw materials, and adding a little calcium fluoride. X-ray powder diffractometry (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM) and differential scanning calorimetry (DSC) were used to characterize the samples. According to the differential thermal curves of the samples at different heating rates, FWO, Kissinger, Friedman and k-value methods were used to study the crystallization kinetics. The results show that the main crystalline phase of the sample is wollastonite, which is presented a lath shape particle. The crystallization activation energies of wollastonite glass ceramics doped calcium fluoride calculated by four kinetic analysis methods are 117.4, 102.8, 110.5 and 100.4 kJ/mol, respectively. The results are close. Compared with the wollastonite glass ceramics without doped calcium fluoride, the crystallization activation energy of wollastonite glass ceramics can be reduced by adding a little of calcium fluoride, which shows that calcium fluoride is helpful to the viscous flow of glass phase. This can increase the ability to promote glass crystallization and help the preparation of wollastonite glass ceramics.
Key words: wollastonite; glass ceramics; calcium fluoride; crystallization kinetics
