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E. R. Silva, N. Correia, J. M. Silva, F. A. C. Oliveira, F. R. Ribeiro, J. C. Bordado, M. F. Ribeiro

Manufacture of cordierite foams by direct foaming (in English)

Polimery 2007, No 5, 351


Summary

Open cell cordierite foams were prepared by a direct foaming two-component polyurethane (PUR)/ceramic system. Through optimization of several experimental parameters, such as contents of catalyst, and ceramic cordierite precursor, as well plasticizer presence, foams with porosities 85-95% and densities ranging from 130-410kg/m3 were obtained. These foams characteristics make them attractive to be used as catalyst supports. The new two-component PUR/ceramic system developed allows the high solid's loading (higher than 40 wt. %). Finer ceramic particles in this system provide better particles' package and cohesion upon sintering, favouring the cordierite foam stability.


Key words: cordierite foams, polyurethane, direct foaming, porosity, density, cellular structure


e-mail: elisabetesilva@ist.utl.pt


E. R. Silva, N. Correia, J. M. Silva, F. A. C. Oliveira, F. R. Ribeiro, J. C. Bordado, M. F. Ribeiro

Manufacture of cordierite foams by direct foaming (in English)