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Porous Al2O3/Al catalyst supports fabricated by an Al(OH)3/Al mixture and the effect of agglomerates

  • Zhen-Yan Deng (a1), Yoshihisa Tanaka (a1), Yoshio Sakka (a2) and Yutaka Kagawa (a3)


Porous Al2O3/Al catalyst supports were fabricated using a mixture of Al(OH)3 and Al powders, followed by pressureless sintering at a temperature of 600 °C in vacuum. Different pressures were used to prepare green compacts. High compaction pressure led to a high surface area and good mechanical and electrical properties for the sintered specimens. However, when the Al content in the sintered specimen exceeded a definite value, high compaction pressure decreased the surface area abruptly. Scanning electron microscopy observations revealed that agglomeration in the starting mixture has a significant effect on the microstructure of the sintered specimens. High compaction pressure greatly eliminated the agglomerates and led to a uniform microstructure for the sintered specimens. However, when the Al content in the starting mixture was too high, Al particles in the compacts prepared by the high pressure were largely sintered due to the high compact density so that most of the pores were closed. The present study indicates that a suitable compaction pressure is critical to obtaining superior Al2O3/Al supports.


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1.Mazzarino, I. and Barresi, A.A.: Catalytic combustion of voc mixtures in a monolithic reactor. Catal. Today 17, 335 (1993).
2.Watari, K. and Shinde, S.L.: High thermal conductivity materials. MRS Bull. 26, 440 (2001).
3.Take, T., Yachi, T., Tomura, M. and Kameyama, H.: Development of plate-fin-type methanol reformer. J. Chem. Eng. Jpn. 36, 75 (2003).
4.Burgos, N., Paulis, M.A. and Montes, M.: Preparation of Al2O3/Al monoliths by anodisation of aluminium as structured catalytic supports. J. Mater. Chem. 13, 1458 (2003).
5.Tikhov, S.F., Fenelonov, V.B., Sadykov, V.A., Potapova, Y.V. and Salanov, A.N.: Porous Al2O3/Al metal ceramics prepared by the oxidation of aluminum powder under hydrothermal conditions followed by thermal dehydration: I composition and macrocharacteristics of composites. Kinet. Catal. 41, 826 (2000).
6.Tikhov, S.F., Potapova, Y.V., Sadykov, V.A., Salanov, A.N., Tsybulya, S.V., Litvak, G.S. and Melgunova, L.F.: Synthesis and properties of highly porous MeOx/Al2O3/Al composites (Me = Mg, Ca, La, Ti, Al). React. Kinet Catal. Lett. 77, 267 (2002).
7.Rat’ko, A.I., Romanenkov, V.E., Bolotnikova, E.V. and Krupen’kina, Z.V.: Hydrothermal synthesis of porous Al2O3/Al metal ceramics: 1. Oxidation of aluminum powder and structure formation of porous Al(OH)3/Al composite. Kinet. Catal. 45, 141 (2004).
8.Guo, Y., Sakurai, M., Kameyama, H., Matsuyama, A. and Kudoh, Y.: Preparation of alumite support and preliminary activity investigation for NO removal in SCR-HC over alumite catalyst. J. Chem. Eng. Jpn. 36, 1470 (2003).
9.Tikhov, S.F., Sadykov, V.A., Potapova, Y.A., Salanov, A.N., Kustova, G.N., Litvak, G.S., Zaikovskii, V.I., Tsybulya, S.V., Pavlova, S.N., Ivanova, A.S., Rozovskii, A.Y., Lin, G.I., Lunin, V.V., Ananyin, V.N. and Belyaev, V.V.: The study of formation of supports and catalysts based upon Al2O3/Al cermets. Stud. Surf. Sci. Catal. 118, 797 (1998).
10.Broek, D.: Elementary Engineering Fracture Mechanics, 4th ed. (Martinus Nijhoff Publishers, Leiden, The Netherlands, 1986).
11.Bagwell, R.B. and Messing, G.L.: Critical factors in the production of sol-gel derived porous alumina. Key Eng. Mater. 115, 45 (1996).
12.Deng, Z.Y., Fukasawa, T., Ando, M., Zhang, G.J. and Ohji, T.: Microstructure and mechanical properties of porous alumina ceramics fabricated by the decomposition of aluminum hydroxide. J. Am. Ceram. Soc. 84, 2638 (2001).
13.Zallon, R.: Physics of Amorphous Solids (Wiley, New York, 1983), Chap. 4.
14.Zok, F., Lange, F.F. and Porter, J.R.: Packing density of composite powder mixtures. J. Am. Ceram. Soc. 74, 1880 (1991).
15.Zhang, G.J. and Ohji, T.: Effect of BN content on elastic modulus and bending strength of SiC-BN in situ composites. J. Mater. Res. 15, 1876 (2000).
16.Bagwell, R.B. and Messing, G.L.: Effect of seeding and water vapor on the nucleation and growth of α–Al2O3 from γ–Al2O3. J. Am. Ceram. Soc. 82, 825 (1999).
17.Lange, F.F.: Sinterability of agglomerated powders. J. Am. Ceram. Soc. 67, 83 (1984).
18.Song, J.H. and Evans, J.R.G.: A die pressing test for the estimation of agglomerate strength. J. Am. Ceram. Soc. 77, 806 (1994).
19.Lannutti, J.J.: Characterization and control of compact microstructure. MRS Bull. 22(12), 38 (1997).
20.Deng, Z.Y., Shi, J.L., Zhang, Y.F., Lai, T.R. and Guo, J.K.: Creep and creep-recovery behavior in silicon-carbide-particle-reinforced alumina. J. Am. Ceram. Soc. 82, 944 (1999).
21.Flinn, B.D., Bordia, R.K., Zimmermann, A. and Rodel, J.: Evolution of defect size and strength of porous alumina during sintering. J. Eur. Ceram. Soc. 20, 2561 (2000).
22.Rice, R.W.: Limitations of pore-stress concentrations on the mechanical properties of porous materials. J. Mater. Sci. 32, 4731 (1997).
23.Rice, R.W.: Comparison of physical property porosity behaviour with minimum solid area models. J. Mater. Sci. 31, 1509 (1996).
24.Hsueh, C.H., Evans, A.G., Cannon, R.M. and Brook, R.J.: Viscoelastic stresses and sintering damage in heterogeneous powder compacts. Acta Metall. 34, 927 (1986).
25.De Jonghe, L.C., Rahaman, M.N. and Hsueh, C.H.: Transient stresses in bimodel compacts during sintering. Acta Metall. 34, 1467 (1986).


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Porous Al2O3/Al catalyst supports fabricated by an Al(OH)3/Al mixture and the effect of agglomerates

  • Zhen-Yan Deng (a1), Yoshihisa Tanaka (a1), Yoshio Sakka (a2) and Yutaka Kagawa (a3)


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