Fabrication of highly porous mullite materials

resumo

Porous mullite, formed by large spherical-shaped pores evenly distributed within a mullite matrix, was processed by a direct consolidation method based on the starch swelling properties. Materials with porosities up to 60 vol% and with an average pore size of similar to 30 mu m were prepared. Porosity matched the starch volume fraction for contents >= 45 vol%, while for lower contents the porosity was above the volume fraction of starch. Formation of crack like defects either surrounding or connecting pores occurred during the drying-sintering processes in the high starch content mullite.

palavras-chave

STARCH CONSOLIDATION; CERAMICS; ALUMINA; BODIES

categoria

Materials Science

autores

Barea, R; Osendi, MI; Miranzo, P; Ferreira, JMF

nossos autores

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