Manufacture of cordierite foams by direct foaming

• Autor(es): Silva, Elisabete Ribeiro ; Correia, N. ; Silva, J. M. ; Oliveira, F. A. Costa ; Ribeiro, F. R. M. C. ; Bordalo, J. C. ; Ribeiro, M. F.
• Data: 2007
• Identificador Persistente: http://hdl.handle.net/10400.9/1039
• Origem: Repositório do LNEG
• Assunto(s): Cordiereti foam; Polyurethane; Direct foaming; Porosity; Density; Cellular structure
• Tipo de Documento: Artigo
• Idioma: Inglês

Descrição

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