INVESTIGADORES
URRETAVIZCAYA Guillermina
artículos
Título:
Thermal Transformation of Sol-gel Alumina into alpha-Phase. Effect of alpha-Al2O3 Seeding
Autor/es:
GUILLERMINA URRETAVIZCAYA; J.M. PORTO LÓPEZ
Revista:
MATERIALS RESEARCH BULLETIN
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Año: 1992 vol. 27 p. 375 - 385
ISSN:
0025-5408
Resumen:
The kinetics of thermal transformation of alumina gels prepared from alkoxide precursors are studied both in the as-prepared gel and in samples seeded with alpha-Al2O3 particles of controlled size. The seeding enhances the reactivity of the gel, by providing sites for the nucleation and growth of the product phase, processes which control the kinetics of the transformation. The densification and the microstructure evolution along the transformation are discussed, and the kinetic parameters determined in the temperature range 1050-1100°C.
