片状Al_(2)O_(3)增强建筑陶瓷板材的制备与性能研究  

Fabrication and Properties of the Building Ceramic Slab Reinforced by Al_(2)O_(3)Platelet

作　　者：聂光临 刘一军 汪庆刚 程科木 吴洋 黄玲艳 潘利敏 包亦望 饶平根[2] NIE Guanglin;LIU Yijun;WANG Qinggang;CHENG Kemu;WU Yang;HUANG Lingyan;PAN Limin;BAO Yiwang;RAO Pinggen(Postdoctoral Research Center,Monalisa Group Co.,Ltd.,Foshan 528211,Guangdong,China;School of Materials Science and Engineering,South China University of Technology,Guangzhou 510641,China;State Key Laboratory of Green Building Materials,China Building Materials Academy,Beijing 100024,China)

机构地区：[1]蒙娜丽莎集团股份有限公司博士后科研工作站,广东佛山528211 [2]华南理工大学材料科学与工程学院,广州510641 [3]中国建筑材料科学研究总院有限公司绿色建筑材料国家重点实验室,北京100024

出　　处：《材料导报》2023年第16期76-82,共7页Materials Reports

基　　金：蒙娜丽莎集团股份有限公司博士后科研工作站资助项目。

摘　　要：本研究采用片状Al_(2)O_(3)为二维增强体,实现了建筑陶瓷板材的力学强化。探究了片状Al_(2)O_(3)粒径与掺量对建筑陶瓷致密度、力学性能、物相组成与微观结构的影响规律,并阐释了片状Al_(2)O_(3)的强韧化机制。研究结果表明:随着片状Al_(2)O_(3)掺量的增加,建筑陶瓷的吸水率与显气孔率逐渐增加、致密度逐渐降低,但片状Al_(2)O_(3)粒径的减小有利于减弱其对建筑陶瓷致密化的抑制作用,使得片状Al_(2)O_(3)(粒径为5μm)的强韧化效果明显优于片状Al_(2)O_(3)(粒径为10μm);掺加5%(质量分数)片状Al_(2)O_(3)(5μm)制得的建筑陶瓷弯曲强度与断裂功可达(71.6±5.5)MPa和(296.2±45.3)J/m^(2),分别较空白试样(片状Al_(2)O_(3)掺量为0%)高25.2%和46.5%。建筑陶瓷的烧结过程不会改变片状Al_(2)O_(3)的晶相与片晶结构,且其与建筑陶瓷基体的界面结合良好,利用片状Al_(2)O_(3)的复合强化、裂纹钉扎、弥散强化与预应力强化机制,可实现建筑陶瓷力学性能的有效提升。所提出的片状Al_(2)O_(3)强韧化技术不仅可提升建筑陶瓷板材的服役安全性与可靠性,而且有利于促进建筑陶瓷板材的薄型化制备。The Al_(2)O_(3)platelet was used as the 2D reinforcement to improve the mechanical properties of building ceramic slabs.The effects of particle size and mixing amount of Al_(2)O_(3)platelet on relative density,mechanical properties,phase compositions and microstructure of building ceramic were explored,and the strengthening-toughening mechanisms of the Al_(2)O_(3)platelet were elucidated in this work.The results show that the water absorption and apparent porosity of the building ceramic were increased,and its relative density was decreased gradually with the increasing mixing amount of Al_(2)O_(3)platelet.The inhibition of Al_(2)O_(3)platelet on the densification of building ceramic can be weakened by reducing the particle size of Al_(2)O_(3)platelet,resulting in a more excellent strengthening-toughening result of the Al_(2)O_(3)platelet with a particle size of 5μm compared with that of the Al_(2)O_(3)platelet with a particle size of 10μm.The flexural strength and fracture energy of the building ceramic prepared by the addition of 5wt%of the Al_(2)O_(3)platelet with a particle size of 5μm can be up to(71.6±5.5)MPa and(296.2±45.3)J/m^(2),which are 25.2%and 46.5%higher than those of the blank sample prepared without Al_(2)O_(3)platelet.The crystal phase and flaky structure of Al_(2)O_(3)platelet can be remained in the building ceramic matrix after the sintering process,and the interfacial bonding between the Al_(2)O_(3)platelet and ceramic matrix is well;furthermore,the mechanical properties of building ceramic can be effectively improved by using the multiple combination of strengthening mechanisms(composite strengthening,crack pinning,dispersion strengthening and prestress reinforcement)of the Al_(2)O_(3)platelet.The proposed strengthening-toughening technology via Al_(2)O_(3)platelet is an effective method to improve the service safety and reliability of building ceramic slab,and also is conductive to promoting the fabrication of ultrathin building ceramic slabs.

关 键 词：片状氧化铝 建筑陶瓷 弯曲强度 断裂功 强韧化 

分 类 号：TU523[建筑科学—建筑技术科学]