▎ 摘　　要

NOVELTY - A tungsten-copper-graphene oxide-based electrical contact material comprises 75-80 %mass tungsten, 20-25 %mass copper and 0.5 %mass graphene oxide (GO). The electrical contact material is provided in the form of cylindrical semi-finished products having a diameter of 20-60 mm and a height of 3-10 mm. USE - Tungsten-copper-graphene oxide-based material used for making electric arc contacts e.g. protection rings and contact points for equipping medium-voltage switching device and high-voltage switching device. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the electrical contact material, which involves adding tungsten powder, copper powder and GO powder in a stoichiometric ratio, introducing 500-1000 g tungsten-copper-GO composite powder into 450-900 ml ethyl alcohol solution, homogenizing at room temperature with a mechanical stirrer at a speed of 300-350 rpm for 2-3 hours, drying for 6-8 hours in a vacuum oven at 80-90° C, introducing the dried tungsten-copper-GO composite powder in a non-granulated state into a high density graphite mold having ladle inner diameter of 20.8-60.8 mm, uniaxially pressing using 0.4 mm thick graphite foils, and sintering in a vacuum spark plasma sintering equipment to obtain sintered cylindrical semi-finished products having density of 13.59-14.41 g/cm3and indented hardness of 3.23-4.08 GPa. The tungsten powder contains polyhedral microcrystalline particles having an average Fisher diameter of 4.2 μ m and an apparent density of 3.55 g/cm3. The copper powder has a granulation of less than 63 μ m and a bulk density of 1.6 g/cm3. The GO powder contains multilayer GO having a lateral dimension of 5-15 nm and a height of 10-15 nm, and has apparent density of 0.24 g/cm3. The multilayer GO contains 73-75 %mass carbon, 23-24 %mass oxygen and 1.3-1.7 %mass nitrogen.