Centre National De La Recherche Scientifique

Manufacture De Vetements Paul Boye

Emmanuel Daguerre

Bernard Spinner

Xavier Py

Vincent Goetz

André Guillot

A method for obtaining activated carbons from a partly mesophased and partly mesogenic pitch containing less than about 40% of the a resins, more than about 40% of type &#x3b2; resins and between about 5 and 30% of type &#x3b3; resins by activating the pitch preceded by its optional carbonization.

Activated carbons and method for obtaining same from a partly mesophase and partly mesogenic pitch

The invention concerns a composite material comprising activated carbon and expanded graphite. The material is a block wherein the activated carbon is homogeneously and uniformly distributed in the form of microporous particles. The texture of said particles is characterised by a microporous volume W ranging between 0.1 cm g and 1.5 cm g and a mean pore dimension L ranging between 2 &angst; and 30 &angst;, the activated carbon particles have substantially the same texture wherever they are located in the composite material, the thermal conductivity levels of the material range between 1 and 100 Wm K . Said material is obtained by heat treatment of a mixture of expanded graphite and an activated carbon precursor in the presence of an activating agent at a temperature and for a time interval sufficient to obtain a wear rate of the activated carbon precursor ranging between 5 and 70% by mass.

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Pollestres, France

Emmanuel Daguerre