(大連交通大學(xué) 材料科學(xué)與工程學(xué)院，大連 116028)
摘 要: 以廢玻璃與鈣鋁黃長石為主要原料，添加氟化鈣通過反應(yīng)析晶燒結(jié)法制得摻氟化鈣硅灰石玻璃陶瓷。采用X射線粉末衍射(XRD)、掃描電鏡(SEM)、高分辨透射電鏡(HRTEM)、差式掃描量熱分析(DSC)等對其進(jìn)行表征，根據(jù)樣品在不同升溫速率下的差熱曲線，分別采用FWO、Kissinger、Friedman和K值法對其進(jìn)行析晶動力學(xué)的研究。結(jié)果表明：樣品主晶相為硅灰石，顆粒呈板條狀。四種動力學(xué)分析方法計(jì)算出摻氟化鈣硅灰石玻璃陶瓷的析晶活化能分別為117.4、102.8、110.5、100.4 kJ/mol，結(jié)果較為接近。與未摻氟化鈣的硅灰石玻璃陶瓷相比，摻入少量的氟化鈣即可降低硅灰石玻璃陶瓷的析晶活化能，說明氟化鈣有利于玻璃相的黏性流動，具有較強(qiáng)的促進(jìn)玻璃析晶能力，有助于硅灰石玻璃陶瓷的制備。
關(guān)鍵字: 硅灰石; 玻璃陶瓷; 氟化鈣; 析晶動力學(xué)
（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
