INTEMA   05428
INSTITUTO DE INVESTIGACIONES EN CIENCIA Y TECNOLOGIA DE MATERIALES
Unidad Ejecutora - UE
artículos
Título:
Microwave sintering of cordierite precursor green bodies prepared by starch consolidation
Autor/es:
M. L. SANDOVAL; M. H. TALOU; P. M. DE SOUTO; R. KIMINAMI; M. A. CAMERUCCI
Revista:
CERAMICS INTERNATIONAL
Editorial:
ELSEVIER SCI LTD
Referencias:
Lugar: Amsterdam; Año: 2011 vol. 37 p. 1237 - 1243
ISSN:
0272-8842
Resumen:
This paper reports on a study of the microwave sintering behavior of
green disks prepared by the starch consolidation forming method to
produce cordierite-based porous materials. Green disks were formed by
thermogelling the aqueous suspensions of talc, kaolin and alumina (29.6
vol.%) and potato starch (11.5 vol.%) at 75 and 85 8C for 4 h, drying
and calcining. They were characterized by bulk density and apparent
porosity measurements, and SEM. Microwave sintering was carried out at
1300 and 1330 8C for 15, 20 and 25 min, applying 50 8C/min. Forpurposes
of comparison, an analysis of green disks prepared and calcined in the
same conditions and conventionally sintered (1330 8C for 4 h) was also
made. The materials were characterized by XRD, bulk density and apparent
porosity measurements, and microstructurally analyzed by SEM. The
results were analyzed considering the behavior of starch in aqueous
suspension at varying temperatures, and the experimental conditions of
consolidation and sintering.