Abstract: In order to prepare the Al2O3/FeCrNi composite honeycomb carrier materials with excellent performance, FeCrNi alloy powder, Fe2O3 powder, Al powder were used as raw materials, the monolithic honeycomb structure was formed by mixing powder, kneading and extruding, then in-situ reaction sintered at 1 200 ℃ for 2 h under the protection of argon gas, and Al2O3/FeCrNi composite honeycomb carrier materials was fabricated. With SEM, XRD and universal testing machine, the structure and mechanical property of Al2O3/FeCrNi composite honeycomb carrier materials were studied. The results show that the matrix of Al2O3/FeCrNi composite honeycomb is γ-Fe(NiCr) after sintering, the Al2O3 formed by the in-situ reaction is distributed partly in the grain boundary of the matrix in the form of agglomeration, and partly in the matrix in a circular granular manner; while the mass fraction of Al2O3 is lower than 1.5%, the compressive strength of Al2O3/FeCrNi composite honeycomb carrier is maintained above 30 MPa; while the mass fraction of Al2O3 is higher than 1.5%, the compressive strength of honeycomb carrier decreases rapidly with the increase of Al2O3 content; with the mass fraction of Al2O3 increasing, the load rate of catalytic active coating on the surface of Al2O3/FeCrNi composite honeycomb carrier increases, and the performance of surface load is improved; while the mass fraction of Al2O3 is 1.5% and the sintering temperature is at 1 200 ℃, the compressive strength of Al2O3/FeCrNi composite honeycomb carrier is as high as 31.5 MPa, and it has strong surface adhesion, solid combination with catalytic active coating, and excellent comprehensive performance.
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2022, Vol. 36 
