Actas de congresos
Alumina porous ceramics: mathematical behavior at different commercial starch concentration
Fecha
2008-01-01Registro en:
Advanced Powder Technology Vi. Stafa-zurich: Trans Tech Publications Ltd, v. 591-593, p. 442-447, 2008.
0255-5476
10.4028/www.scientific.net/MSF.591-593.442
WOS:000262481100074
Autor
Universidade Estadual Paulista (Unesp)
Institución
Resumen
Several researches have been developed in order to verify the porosity effect over the ceramic material properties. The starch consolidation casting (SCC) allows to obtain porous ceramics by using starch as a binder and pore forming element. This work is intended to describe the porous mathematical behavior and the mechanical resistance at different commercial starch concentration. Ceramic samples were made with alumina and potato and corn starches. The slips were prepared with 10 to 50 wt% of starch. The specimens were characterized by apparent density measurements and three-point flexural test associated to Weibull statistics. Results indicated that the porosity showed a first-order exponential equation e(-x/c) increasing in both kinds of starches, so it was confirmed that the alumina ceramic porosity is related to the kind of starch used. The mechanical resistance is represented by a logarithmic expression R = A + B/1+10((Log(x0)-P)C).