EQUIPMENT AND PROCESS FOR THE PREPARATION OF ELECTRIC CONDUCTING COMPOSITE SAMPLES FOR THE DIRECT INSTRUMENTAL ANALYSIS OF POWDERS

摘要

Equipment for the preparation of electric conducting composite samples by infiltration in a mould characterized in that it essentially comprises: - a pressurization/infiltration chamber having at least one opening to connect it by means of appropriate tubes with a vacuum line and a pressure line and devices for sealing both under vacuum and under pressure; - a sample-holder, inside said chamber, made of a material with a high thermal conductivity with one or more seats in each of which a mould is housed consisting of: - a chemically inert and thermally stable tube made of a non-porous material; - a plug, situated at one end of the tube, of a material which is different from the tube; - a chemically inert and thermally stable spacer of non-porous material, situated inside the tube in contact with the plug; - means for creating a vacuum in the chamber; - means for pressurizing the chamber; - means for the thermal treatment of the sample-holder.