不同量粉煤灰漂珠制备氧化物多孔陶瓷的性能研究  

Properties of oxide porous ceramics prepared by different additions of fly ash cenosphere

作　　者：董博 邓承继[1] 陈嵛沣 谢哲 丁军[1] 朱青友[1] 祝洪喜[1] 余超[1] Dong Bo;Deng Chengji;Chen Yufeng;Xie Zhe;Ding Jun;Zhu Qingyou;Zhu Hongxi;Yu Chao(The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China;不详)

机构地区：[1]武汉科技大学省部共建耐火材料与冶金国家重点实验室,湖北武汉430081

出　　处：《耐火材料》2023年第3期185-188,共4页Refractories

基　　金：国家自然科学基金联合基金项目(U20A20239);湖北省重点研发计划项目(2021BAD002)联合资助。

摘　　要：为进一步拓展粉煤灰漂珠在多孔陶瓷领域的应用,以粉煤灰漂珠、镁橄榄石、绢云母粉及铝矾土为主要原料,其中粉煤灰漂珠加入量分别为40%、60%、80%(w),成型后在空气气氛下于1100℃热处理1h制得多孔陶瓷材料,分析其物相组成、显微结构以及常规物理性能。结果表明:1)粉煤灰漂珠加入量由40%(w)增加至80%(w),粉煤灰漂珠与基质的间隔变大,试样的气孔率增大、体积密度和常温耐压强度减小,但其气孔的分形维数未有明显变化;2)当粉煤灰漂珠加入量为60%(w)时,试样综合性能较优,此时其体积密度约为(0.90±0.01)g·cm^(-3),且在气孔率为(66.9±0.5)%时,仍具有约(12.37±0.69)MPa的常温耐压强度,在300、600及900℃下的热导率分别为0.201、0.232和0.262W·m^(-1)·K^(-1),因此在隔热耐火材料领域具有良好应用前景。In order to further expand the application of fly ash cenosphere in the field of porous ceramics,porous ceramics were prepared using fly ash cenosphere,forsterite,sericite powder and bauxite as main raw materials,molding,then heat treating at 1100℃for 1 h in air atmosphere.The fly ash cenosphere addition varied from 40%,60%,to 80%,by mass.The phase composition,microstructure and conventional physical properties of the porous ceramics were studied.The results show that:(1)with the increase of the fly ash cenosphere addition from 40%to 80%,the interval between fly ash cenosphere and the matrix increases,the porosity rises,the bulk density and the cold compressive strength decrease,but the fractal dimension of the pores does not change significantly;(2)with 60%addition of fly ash cenosphere,the comprehensive performance of the sample is optimal with about(0.90±0.01)g·cm^(-3) of the bulk density,(66.9±0.5)%of the porosity,about(12.37±0.69)MPa of the cold compressive strength,and 0.201,0.232 and 0.262 W·m^(-1)·K^(-1) of the thermal conductivity at 300,600 and 900℃.Therefore,it has a good application prospect in the field of thermal insulation refractories.

关 键 词：粉煤灰漂珠 颗粒堆积法 多孔陶瓷材料 分形维数 力学性能 

分 类 号：TQ175.71[化学工程—硅酸盐工业]