METHOD OF PRODUCING POROUS POWDER MATERIALS Russian patent published in 2025 - IPC B22F3/11 B22F3/12 C04B38/06 C04B35/185 

FIELD: powder metallurgy.

SUBSTANCE: invention relates to powder metallurgy, particularly, to production of porous powder materials and may be used for production of filters for fine cleaning of liquids and gases with high permeability and fineness of cleaning. Method involves preparation of a mixture by applying a binder on the particles of a blowing agent and mixing them with a powder, its moulding and sintering. Metal or ceramic powder is used during mixing. At least two and not more than five layers of ceramic powder are applied on particles of the pore-forming agent; at that, when applying the first layer of ceramic powder, an organic binder is applied on the particles, and when applying the second and subsequent layers, an inorganic binder is used.

EFFECT: higher efficiency of filtering products by 58.8-66.7% and their strength by more than 1_6 times.

5 cl, 1 dwg, 1 tbl, 4 ex