METHOD OF MAKING FILTERING MATERIAL Russian patent published in 1995 - IPC

FIELD: powder metallurgy. SUBSTANCE: method of making filtering material, including a porous metallic substrate and a selective layer, having a wide range of non-organic material and their compounds with mean particle size no more, than 0.5 micrometers, the particles being spherical ones, comprises steps of applying a sublayer of a powder onto the substrate, the powder corresponding to the material of the substrate; drying the sublayer, had been applied; rolling it on upon pressure; equal to 50-100 MPa, and sintering, then applying a layer of the powder of the selective layer material and repeating steps of drying, rolling on and sintering. EFFECT: enhanced quality of filtering material. 6 cl