Preparation and Properties of Calcium Hexaaluminate Porous Ceramics  

作　　者：WANG Gang ZHANG Qi HAN Jianshen YUAN Bo LI Hongxia 

机构地区：[1]State Key Laboratory of Advanced Refractories,Sinosteel Luoyang Institute of Refractories Research Co.,Ltd.,Luoyang 471039,China

出　　处：《China's Refractories》2020年第1期15-19,共5页中国耐火材料（英文版）

基　　金：supported by grants from the National Natural Science Foundation of China (NSFC-No. 51672256);Project of Outstanding Talents of Henan Province (No.184200510024).

摘　　要：In this paper,calcium hexaaluminate(CA6)porous ceramics were prepared by a foaming method combined with cement solidification molding.The effects of the foaming agent addition on the microstructure and the properties of the ceramics were studied.The results show that the microstructure and the porosity of the ceramics can be controlled by adjusting the addition of the foaming agent.As the addition of the foaming agent increased,the bulk density reduced from 1 g·cm^-3 to 0.35 g·cm^-3,the porosity increased from 70.4%to 89.6%,the compressive strength reduced from 18.46 MPa to 1.66 MPa,and the thermal conductivity at 1000°C decreased from 0.382 W·m^-1·K^-1 to 0.144 W·m^-1·K^-1.It is indicated that calcium hexaaluminate porous ceramics with low density,high strength and low thermal conductivity can be obtained by the foaming method.As the lining material of high temperature electric furnaces,the ceramic has excellent energy saving effect.In this paper, calcium hexaaluminate（CA6） porous ceramics were prepared by a foaming method combined with cement solidification molding. The effects of the foaming agent addition on the microstructure and the properties of the ceramics were studied. The results show that the microstructure and the porosity of the ceramics can be controlled by adjusting the addition of the foaming agent. As the addition of the foaming agent increased, the bulk density reduced from 1 g · cm-3 to 0.35 g · cm-3, the porosity increased from 70.4% to 89.6%, the compressive strength reduced from 18.46 MPa to 1.66 MPa, and the thermal conductivity at 1 000 °C decreased from 0.382 W · m-1 · K-1 to 0.144 W · m-1 · K-1. It is indicated that calcium hexaaluminate porous ceramics with low density, high strength and low thermal conductivity can be obtained by the foaming method. As the lining material of high temperature electric furnaces, the ceramic has excellent energy saving effect.

关 键 词：CALCIUM HEXAALUMINATE POROUS CERAMICS FOAMING METHOD 

分 类 号：TQ174.75[化学工程—陶瓷工业]