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Type: Artigo de periódico
Title: Applications Of A Granular Model And Percolation Theory To The Electrical Resistivity Of Heat Treated Endocarp Of Babassu Nut
Author: Emmerich F.G.
de Sousa J.C.
Torriani I.L.
Luengo C.A.
Abstract: The volume fraction, X, of the conducting phase in a granular structure defined in the carbon matrix and applicable to heat treated biomass carbons is calculated as a function of structural parameters obtained from X-ray diffraction and small angle X-ray scattering measurements. The room temperature electrical resistivity of heat treated endocarp of babassu nut with heat treatment temperatures up to 2200°C is thus presented as a function of X. The drop of twelve orders of magnitude in the resistivity is explained as a percolation transition in the granular structure, X being the fundamental parameter. The electronic conduction process occurs in this structure with the involvement of microcrystallites and micropores. © 1987.
Rights: fechado
Identifier DOI: 10.1016/0008-6223(87)90013-3
Date Issue: 1987
Appears in Collections:Unicamp - Artigos e Outros Documentos

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