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 conductingcomposite samples by infiltration in a mould characterizedin that it essentially comprises:- a pressurization/infiltration chamber having atleast one opening to connect it by means ofappropriate tubes with a vacuum line and a pressureline and devices for sealing both undervacuum and under pressure;- a sample-holder, inside said chamber, made of amaterial with a high thermal conductivity with oneor more seats in each of which a mould is housedconsisting of:- a chemically inert and thermally stable tubemade of a non-porous material;- a plug, situated at one end of the tube, ofa material which is different from the tube;- a chemically inert and thermally stablespacer of non-porous material, situatedinside 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.