微波养护制度对粉煤灰基地质聚合物显微结构与性能的影响研究  

Study on the Effect of Microwave Curing Schedule on the Microstructure and Properties of Fly ash Based Geopolymer

作　　者：张颖 丁二宝 胡海泉 曹春娥 徐炎 ZHANG Ying;DING Erbao;HU Haiquan;CAO Chun'e;XU Yan(Jingdezhen Ceramic University,Jingdezhen 333000,China;Hennan key laboratory of research for central plains ancient ceramics,Pingdingshan 467000,China;Jiangxi zhongcai electric porcelain Co.Ltd,Pingxiang 337000,China)

机构地区：[1]景德镇陶瓷大学,景德镇333000 [2]河南省中原古陶瓷研究重点实验室,平顶山467000 [3]江西中材电瓷电气有限公司,萍乡337000

出　　处：《中国陶瓷》2021年第12期59-64,共6页China Ceramics

基　　金：国家自然科学基金(51162016);江西省科技支撑计划项目(20133BBE50004);景德镇市科技计划项目(2017GYZD016-03);景德镇陶瓷大学社会科学研究项目(01003002048);平顶山学院博士科研启动基金项目(PXY-BSQD-202111)。

摘　　要：采用压制成型法制备粉煤灰基地质聚合物材料,主要研究了微波养护制度对样品强度的影响,并对样品进行了XRD、SEM及FTIR表征。结果表明:在低、中、高三种功率连续阶梯式养护制度下,样品的抗折强度先增大后减小,最大值为养护至4 h的29.73 MPa。采用中功率方式养护,样品的抗折强度随养护时间的延长呈先增大后减小的规律,在15 min时抗折强度有最大值,为29.69 MPa,样品显微结构由致密变疏松,之后会形成裂纹。代表缩聚反应的红外峰位置从高波数向低波数方向移动,然后又回到高波数位置,结构中会形成新的针状沸石相,能够改善样品的抗折强度。Fly ash based geopolymer materials were pressed by using fly ash and slag.Effect of microwave curing schedule on the bending strengths of the samples was studied and XRD,SEM and FTIR were employed to characterize the microstructure and phases of the samples.The results show that the bending strengths of the samples increase first and then decrease at the continuous stepped curing schedule with low,medium and liigh power.The maximum bending strength value of the sample is 29.73 MPa after curing to 4 hours.The bending strengths of the samples first increase and then decrease with the extension of the curing time under the single medium power curing schedule.The maximum bending strength of the sample is 29.69 MPa when curing for 15 minutes.The microstructure of the samples changes from dense to loose and then cracks will appear.The infrared peak position representing the polycondensation reaction moves from high wavenumber to low direction,and then returns to high position again.A new needle-shaped zeolite phase is formed in the structure which can improve the bending strength of the sample.

关 键 词：微波养护 抗折强度 缩聚反应 显微结构 

分 类 号：TQ174.76[化学工程—陶瓷工业]