Effect of Alumina Content on the Properties of Ceramic Foams Crystallized with Nano-Sized Mullite Crystals

Abstract:

Ceramic foam is a class of materials with high porosity and three-dimensional network of struts. In this study, ceramic foams were fabricated by polymeric sponge method using commercial PVA foam as a replica template. The study focused on the effect of alumina content on the physical and mechanical properties of such ceramic foams sintered at 1500°C for different sintering times. It was found that ceramic composition with higher amount of alumina required higher sintering temperature than that used in the present study. Physical properties and mechanical strengths depended upon ceramic composition as well as sintering time. Microstructural analysis revealed the evolution of primary cuboidal mullite and needle-like nano-sized mullite phase in the sintered sample. This fine needle-like phase added to mechanical strengths of ceramics.

• Periodical: Materials Science Forum (Volume 694)
• Pages: 456-460
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.694.456
• Online since: July 2011
• Authors: Pat Sooksaen
• Keywords: Ceramic Foam, Microstructure, Mullite, Porosity, Sintering

References

[1] L.J. Gibson and M.F. Ashby, Cellular solids structure and properties, 2nd ed., Cambridge 1998, Pergamon Press.

[2] P. Colombo, Ceramic foams: fabrication, properties and application, Key Engineering Materials. 20-213 (2002) 1913-(1918).

DOI: 10.4028/www.scientific.net/kem.206-213.1913

[3] P. Colombo and E. Bernardo, Macro- and micro-cellular porous ceramics from preceramic polymers, Composite Science and Technology. 63 (2003) 2355-2359.

DOI: 10.1016/s0266-3538(03)00268-9

[4] H.X. Peng , Z. Fan, J.R.G. Evans, and J.J.C. Busfield, Microstructure of ceramic foam, J. Eur. Ceram. Soc. 20 (2000) 807-813.

[5] J. Saggio-Woyansky, C.E. Scott and W.P. Minnear, Processing of porous ceramics, Am. Ceram. Soc. Bull. 71(11) (1992) 1674-1682.

[6] H. Schmidt, D. Koch, G. Grathwohl and P. Colombo, Micro-macroporous ceramics from preceramic precursors, J. Am. Ceram. Soc. 84(10) (2001) 2252-2255.

DOI: 10.1111/j.1151-2916.2001.tb00997.x

[7] P. Sepulveda, Gelcasting foams for porous ceramics, Am. Ceram, Soc. Bull. 76(10) (1997) 61-65.

[8] S.J. Powell and J.R.G. Evans, The structure of ceramic foams prepared from polyurethane-ceramic suspensions, Materials and Manufacturing Processes. 10(4) (1995) 757-771.

DOI: 10.1080/10426919508935063

[9] Z.H. Wen, Y.S. Han, L. Liang and J.B. Li, Preparation of porous ceramics with controllable pore sizes in an easy and low-cost way, Materials Characterization. 59(9) (2008) 1335-1338.

DOI: 10.1016/j.matchar.2007.11.010

[10] W.E. Lee and Y. Iqbal, Influence of mixing on mullite formation in porcelain, J. Eur. Ceram. Soc. 21(14) (2001) 2583-2586.

DOI: 10.1016/s0955-2219(01)00274-6

[11] H.X. Peng, Z. Fan and J.R.G. Evans, Factors affecting the microstructure of a fine ceramic foam, Ceramics International. 26 (2000) 887-895.

DOI: 10.1016/s0272-8842(00)00032-8