Pore Control and Mechanical Properties of Alumina Ceramics Using Direct Ink Writing  

作　　者：ZHU Kai ZHAO Xiang YANG Lianghua YANG Daoyuan YUAN Huiyu 

机构地区：[1]Intelligent Manufacturing Institute,Henan Polytechnic,Zhengzhou 450000,China [2]Henan Key Laboratory of High Temperature Functional Ceramics,School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450002,China

出　　处：《China's Refractories》2024年第4期19-28,共10页中国耐火材料（英文版）

基　　金：financial support from the Scientific and Technological Key Project of Henan Province in 2023(232102230110);the National Natural Science Foundation of China(NSFC)(Grant No.51902290);the Young Top-Notch Talent Program of Zhengzhou University(No.125/32310189);the Science and Technology Program of the State Administration for Market Regulation(2021MK062)。

摘　　要：Ceramics with proper pore sizes and geometry are critical to many applications,so that lots of efforts have been made to achieve the goal.Direct ink writing(DIW),an additive manufacturing technique,is cost-effective and accessible.It is interesting to study the ability to control the pore size and geometry by the DIW technique.In this study,alumina ceramics were prepared with special focus on the pore configuration and the performance of printed samples was tested.The porous structures with different pore sizes(minimum pore size of 200μm)and different shapes(honeycomb,lattice and triangle)were printed.The printed structures shrunk uniformly and maintained the original geometry after firing,they did not show any visible defects or deformations,and the microstructure was uniform and dense.It was found the honeycomb structures exhibited superior mechanical strength at the same porosity compared to lattice and triangle structures,which reached 55 MPa with a porosity of 70%.The high strength with the high porosity was attributed to the highly controlled microstructure,i.e.,uniform pore sizes,pore shapes and interconnectivity.

关 键 词：direct ink writing porous structures high porosity mechanical strength 

分 类 号：TQ174.758.11[化学工程—陶瓷工业]