Synthesis of Alpha-Al2o3 Based Foams with Improved Properties as Catalyst Carriers
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This paper explores the possibility of synthesising catalyst supports with improved properties. Alumina foams were produced with the polymer replication technique. Representative high- and low-temperature sintering ceramics were selected. Suitable suspension amounts, the clay addition and sintering temperature were determined. A lower sintering temperature was used for an economic enhancement of the process. The sintering was conducted at the temperatures from 1573 K to 1773 K for 60 min. A comparative analysis of the studied systems shows that the best compressive strength of 6.2 MPa was achieved with the system based on the alpha-Al2O3-25 clay (mass fractions, w/%), polyester foam with 10 PPI, sintered at 1673 K.
Keywords:alumina / reticulated foam / sintering / mechanical properties / catalyst carrier
Source:Materials and Technology = Materiali in Tehnologije, 2014, 48, 1, 45-50
- Inst Za Kovinske Materiale I In Tehnologie, Ljubjana