Abstract: The invention relates to a process for preparing proton-conducting clay particles, successively comprising the following steps: a) a step of activating a clay powder, comprising a step in which the said powder is subjected to a gas plasma; b) a grafting step comprising a step of placing the activated powder obtained from step a) in contact with a solution comprising at least one compound comprising at least one group chosen from —PO3H2, —CO2H and —SO3H and salts thereof and comprising at least one group capable of grafting onto the surface of the said powder. Use of these particles for the manufacture of fuel cell membranes.

Abstract: This invention relates to a method for continuously producing a CCB type of “Electrode-Membrane-Electrode” assembly comprising a polymer electrolyte membrane (26) on which a first electrode (21) formed from a first active layer and a first gas diffusion layer is formed on a first face, and a second electrode (21?) formed from a second active layer and a second gas diffusion layer is formed on a second face, in which the membrane and the two electrodes are assembled continuously by dynamic pressing at a temperature below 100° C., the outside surface of the active layer of each electrode, that will come into contact with a face of the membrane having firstly been heated to a temperature between 50° C. and 200° C., which comprises the following steps: a step to position rolls for the polyelectrolyte membrane (26) and two peel-off adhesive backing films (23, 23?), and a step to cut out electrodes (21, 21?) and deposit them on these backing films (23, 23?).

Abstract: The invention relates to a process for preparing proton-conducting clay particles, successively comprising the following steps: a) a step of activating a clay powder, comprising a step in which the said powder is subjected to a gas plasma; b) a grafting step comprising a step of placing the activated powder obtained from step a) in contact with a solution comprising at least one compound comprising at least one group chosen from —PO3H2, —CO2H and —SO3H and salts thereof and comprising at least one group capable of grafting onto the surface of the said powder. Use of these particles for the manufacture of fuel cell membranes.

Abstract: A predictive choice process of a manufacturing process of an optical component intended to be subjected to laser fluxes, the choice being intended to select from among several possible manufacturing processes that which results in components having better laser flux behaviour than those obtained by the other possible processes characterised in that a) a number N of cathodoluminescence measurements are made on components obtained by a first of the possible manufacturing processes, while the component receives an electronic beam having a determined energy, a focus on the surface of the determined component and a determined intensity controlled by a value of a ground current measured on the component, while it is being subjected to said electronic beam, b) an average cathodoluminescence value on the N measurements is calculated, c) operations a) and b) on components obtained by each of the other possible manufacturing processes are repeated, d) the most advantageous manufacturing process is decided as the one fo

Abstract: The present invention concerns a flexible electrochrome structure operating in reflection at wavelengths between 0.35 and 20 &mgr;m. It comprises a microporous membrane including an electrolyte and, deposited on each of the surfaces of the microporous membrane, in a symmetrical manner in relation to said membrane, successively and in this order: a layer forming a reflecting electrode, a layer of electrochrome conductive polymer, and a flexible window transparent to wavelengths between 0.35 and 20 &mgr;m.

Abstract: Process for charging a structure formed from an insulating body sandwiched between two electrodes. In the process a Faraday cage is placed in contact with one of the electrodes of the structure, the potential of the other electrode being made equal to a reference potential. Electrons originating from a controlled electron emission device are introduced into the Faraday cage, the electrons reaching the electrode with which the Faraday cage is in contact to charge the structure. Such a process may find particular application for determining properties of insulating materials.

Abstract: The present invention concerns a flexible electrochrome structure operating in reflection at wavelengths between 0.35 and 20 &mgr;m. It comprises a microporous membrane including an electrolyte and, deposited on each of the surfaces of the microporous membrane, in a symmetrical manner in relation to said membrane, successively and in this order: a layer forming a reflecting electrode, a layer of electrochrome conductive polymer, and a flexible window transparent to wavelengths between 0.35 and 20 &mgr;m.

Abstract: Process for charging a structure (1) formed from an insulating body (2) sandwiched between two electrodes (3, 4), characterized in that it comprises the following steps:

Abstract: The invention relates to a process for the production of a material having an improved dielectric strength and use of said material in the manufacture of power transmission cables.The object of the invention is to obtain mixtures remaining macroscopically very insulating and which locally, at a scale below 1 micron, can have conductivity levels of approximately 10.sup.-9 S.cm.sup.-1.This object is achieved with the aid of a process comprising the following stages:dissolving at least one conductive polymer in an organic solvent, to form an impregnation solution and impregnating granules constituted by an insulating polymer or a mixture of insulating polymers,evaporating the solvent to obtain insulating polymer granules covered with a conductive polymer,drying said granules,hot mixing or extruding said granules to form a homogeneous mixture, which can be restored to granule form.