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Standard Transition Aluminas. Electron …
Standard Transition aluminas . Electron microscopy StudiesP. Souza Santosa, H. Souza Santos*b, rio de Mat rias-Primas Particuladas e S lidos N o Met licos,Departamento de Engenharia Qu mica, Escola Polit cnica,Universidade de S o Paulo, S o Paulo, SP, BrazilbLaborat rio de Microscopia Eletr nica, Departamento de F sica Geral,Instituto de F sica, Universidade de S o Paulo, S o Paulo, SP, BrazilReceived: May 30, 2000; Revised: November 17, 2000 The aim of this paper is to present the results of characterization of the particle shapes of sixstandard Transition aluminas samples using transmission and scanning Electron microscopies;selected area Electron diffraction, in parallel with X-ray powder diffraction were used for confirma-tion 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- anddelta-Al203microcrystals are pseudomorphs from their respective precursors gibbsite and , theta-Al203microcrystals are not pseudomorphs after the Standard , eta-Al203are not pseudomorphs after bayerite : Transition aluminas , alumina precursors, gibbsite, Electron microscopies1.
Standard Transition Aluminas. Electron Microscopy Studies P. Souza Santosa, H. Souza Santos*b,S.P.Toledob aLaboratório de Matérias-Primas Particuladas e …
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