Preparation of Ca-Mg-Al-Si High Performance Foam Ceramics
By optimizing the composition of steel slag and magnesite,high-performance Ca-Mg-Al-Si foam ceramics with high strength and low thermal conductivity were prepared by the high-temperature foaming method.Its main raw materials are andalusite and sand shale,with silicon carbide as the foaming agent and spodumene as the fluxing agent.While testing its properties,such as porosity,bulk density,and flexural strength,Micro-CT,SEM,XRD,XRF and other detection methods were used to characterize the foam ceramics.The results show that comprehensive performance is best when the sample contains 11 wt％steel slag and 7 wt％magnesite.Under these conditions,the flexural strength is 11.15 MPa,the thermal conductivity is 0.091 W/(m·K),the total porosity is 61.02％,the closed porosity is 55.30％,and the bulk density is 0.944 g/cm3.
High strengthLow thermal conductivityCa-Mg-Al-Si seriesFoam ceramics
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