Revista: | Materials research |
Base de datos: | PERIÓDICA |
Número de sistema: | 000312447 |
ISSN: | 1516-1439 |
Autores: | Santos, P. Souza1 Santos, H. Souza2 Toledo, S.P |
Instituciones: | 1Universidade de Sao Paulo, Escola Politecnica, Sao Paulo. Brasil 2Universidade de Sao Paulo, Instituto de Fisica, Sao Paulo. Brasil |
Año: | 2000 |
Periodo: | Oct |
Volumen: | 3 |
Número: | 4 |
Paginación: | 104-114 |
País: | Brasil |
Idioma: | Inglés |
Tipo de documento: | Artículo |
Enfoque: | Descriptivo |
Resumen en inglés | The aim of this paper is to present the results of characterization of the particle shapes of six standard transition aluminas samples using transmission and scanning electron microscopies; selected area electron diffraction, in parallel with X-ray powder diffraction were used for confirmation of the different transition aluminas types. The transition aluminas - chi; kappa; gamma; theta; delta; and eta were supplied by ALCOA Central Laboratory. The chi-; kappa-;gamma- and delta-Al203 microcrystals are pseudomorphs from their respective precursors gibbsite and boehmite. However, theta-Al203 microcrystals are not pseudomorphs after the standard delta-Al203 sample. Also, eta-Al203 are not pseudomorphs after bayerite somatoids |
Disciplinas: | Ingeniería, Física y astronomía |
Palabras clave: | Ingeniería de materiales, Ingeniería electrónica, Física de materia condensada, Alúminas de transición, Microscopía electrónica |
Keyword: | Engineering, Physics and astronomy, Electronic engineering, Materials engineering, Condensed matter physics, Transition aluminas, Electron microscopy |
Texto completo: | Texto completo (Ver HTML) |