Artículos de revistas
Microscopic Structure And Electrical Properties Of Heat Treated Coals And Eucalyptus Charcoal
Registro en:
Carbon. , v. 20, n. 3, p. 201 - 205, 1982.
86223
10.1016/0008-6223(82)90021-5
2-s2.0-0020310326
Autor
Hernandez J.G.
Hernandez-Calderon I.
Luengo C.A.
Tsu R.
Institución
Resumen
The essential parameter governing the conduction process of coal under heat treatment in the range 500-800°C is the volume fraction of the graphitic particles distributed among microvoids. Combining the activated conduction description with percolation, we have obtained the effective barrier height for tunneling between grains which is independent of the volume fraction. Thus all dependence on the heat treatment temperature have been reduced to a single parameter, the volume fraction. © 1982. 20 3 201 205 Lowry, (1963) Chemistry of Coal Utilization, , Wiley, New York Gonzalez-Hernandez, Hernandez-Calderon, Luengo, (1981) Revista Brasileira de Fisica, 11, p. 121 Schneider, Luengo, (1978) Inst. J. Energy Res., 2, p. 123 Franklin, (1949) Trans. Faraday Soc., 45, p. 668 Gonzalez-Hernandez, Hernandez-Calderon, Luengo, Tsu, (1981) 15th Biennal Conf. on Carbon, , Philadelphia Carmona, Delhaes, (1978) J. Appl. Phys., 49, p. 618 Tsu, Gonzalez-Hernandez, Hernandez-Calderon, Luengo, (1978) Solid State Comm., 27, p. 507 Tuinstra, Koening, Raman Spectrum of Graphite (1976) The Journal of Chemical Physics, 53, p. 1126 Mrozowski, Semiconductivity and Diamagnetism of Polycrystalline Graphite and Condensed Ring Systems (1952) Physical Review, 84, p. 609 Scher, Zallen, (1970) J. Chem. Phys., 53, p. 3759 Abeles, Sheng, Cuttes, Arie, Structural and electrical properties of granular metal films (1975) Advances in Physics, 24, p. 407 Honda, Kobagashi, Sugawara, (1967) Carbon, 6, p. 517 Beyer, Ergun, An X-ray study of carbon blacks produced from coals (1966) Carbon, 5, p. 107 Warren, (1941) Phys. Rev., 59, p. 693 Warren, (1969) X-ray Diffraction, , Addison-Wesley, New York Perret, Ruland, X-ray small-angle scattering of glassy carbon (1972) Journal of Applied Crystallography, 5, p. 183 Lin, Hendricks, Harris, Yust, Microporosity and micromineralogy of vitrinite in a bituminous coal (1978) Journal of Applied Crystallography, 11, p. 621 Guinier, Fournet, (1955) Small-Angle Scattering of X-ray, , Wiley, London Gonzalez-Hernandez, Torriani, Luengo, (1982) J. Appl. Crystl, , in press Kupperman, Chau, Weinstock, (1972) Carbon, 11, p. 171 Mott, Conduction in non-crystalline materials (1969) Philosophical Magazine, 19, p. 835 Morgan, (1971) Thin Solid Filsm, 7, p. 313 Adkins, Freake, Hamilton, Electrical conduction in amorphous carbon (1970) Philosophical Magazine, 22, p. 183 Hamilton, Cross, Adkins, (1974) Amorphous and Liquid Semiconductors, 2, p. 1225. , 2nd Edn., J. Stuk, W. Brenig, Wiley Sheng, Abeles, (1972) Phys. Rev. Lett., 28, p. 34 Zallen, (1979) Fluctuations Phenomena, , E.W. Montoll, J.L. Lebowits, North-Holland, Amsterdam