▎ 摘　　要

NOVELTY - A heat sink material has an insulating layer, a thermally-conductive layer, a heat-transfer layer, a heat-sink layer and a protective layer sequentially attached. The insulating layer comprises silicon carbide, aluminum oxide, silica, binder, kaolin, magnesium oxide, Dongyang soil, lightweight calcium material and rare-earth oxide. The thermally-conductive layer comprises graphene, carbon nanotubes and nano-carbon fibers. USE - Heat sink material (claimed). ADVANTAGE - The lightweight heat sink material has excellent insulation characteristics and heat dissipation characteristics, low coefficient of expansion and large thermal conductivity coefficient. DETAILED DESCRIPTION - A heat sink material has an insulating layer, a thermally-conductive layer, a heat-transfer layer, a heat-sink layer and a protective layer sequentially attached. The insulating layer comprises 40-70 parts mass silicon carbide, 13-55 parts mass aluminum oxide, 2-15 parts mass silica, 3-25 parts mass binder, 2-20 parts mass kaolin, 0.5-2 parts mass magnesium oxide, 0.5-2 parts mass Dongyang soil, 0.5-2 parts mass lightweight calcium material and 0.2-0.5 part mass rare-earth oxide. The thermally-conductive layer comprises 80-95 parts mass graphene, 0.1-20 parts mass carbon nanotubes and 0.1-20 parts mass nano-carbon fibers. The cooling layer includes 47-50 parts mass copper, 49-52 parts mass aluminum, 0.2-0.7 part mass magnesium, 0.2-0.7 part mass iron, 0.2-0.5 part mass manganese, 0.1-0.3 part mass titanium, 0.05-0.1 part mass chromium and 0.1-0.3 part mass vanadium. The protective layer comprises 20-40 parts mass graphite, 20-30 parts mass carbon fibers, 40-60 parts mass polyamide, 10-20 parts mass water-soluble salt, 1-8 parts mass hexagonal boron nitride, 2-5 parts mass bismaleimide, 0.5-2 parts mass silane coupling agent and 0.25-1 part mass antioxidant. An INDEPENDENT CLAIM is included for light-emitting-diode lamp.