METHOD FOR PRODUCTION OF ABRASIVE POWDER POLISHING MATERIALS Russian patent published in 2005 - IPC

FIELD: soft abrasive materials based on mixed aluminum and iron oxides.

SUBSTANCE: method includes blending of raw components and subsequent heat treatment. Solutions of aluminum and iron sulfate with ammonia bicarbonate admixture heated to 40-60⁰C are used as raw materials to produce slurry of aluminum and iron bicarbonates. Precipitate is separated by filtration, washed and dried. Heat treatment is carried out at 1150-1200⁰C to provide solid solution expressed by general formula Al_2-xFe_xO₃, wherein x = 0.30-0.37. Mass part of iron oxide in finished product is 20-25 mass %. Abrasive materials of present invention are useful for finished polishing of metal parts, have polishing ability of 0.37-0.40 mg/min.cm², provide roughness R_Z = 0.07-0.08 mum after polishing and 85-90 %-yield of high-precision accepted metal parts.

EFFECT: environmentally friendly abrasive materials of improved quality.

1 cl, 3 ex, 1 dwg