NOVELTY - A thermal radiation coating material (11) comprises main ingredient which has mixed solution of aluminum oxide and liquid epoxy resin, hardening agent, and artificial mineral powder. The coating material is prepared by mixing main ingredient and artificial mineral powder and hardening with hardening agent, adding tourmaline or ceramic, iron, aluminum and calcium after carrying out thermofusion of silicon compound, cooling, and grinding ore lump obtained by cooling after melting again at high temperature.    USE - Thermal radiation coating material for thermal radiation layer structure (claimed) used for motor or generator of electric vehicle or motor vehicle, solar cell module, LED lamp of midget submarine, LED electric light bulb, and heat sink of integrated circuit (IC) substrate for semiconductor integrated circuit. Can also be used for domestic electric power generation, factory, office, ship, and airplane.    ADVANTAGE - The thermal radiation coating material has sufficient adhesiveness and favorable thermal conductivity.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for:    (1) thermal radiation layer structure comprising thermal radiation layer of fixed thickness which is formed by applying viscous thermal radiation coating material obtained by mixing main ingredient, hardening agent and artificial mineral powder in surface of heat-resistant case, and vertical groove with predetermined width and predetermined depth which is formed in thermal radiation layer;    (2) manufacturing method of thermal radiation coating material involving mixing aluminum oxide, liquid epoxy resin and alkylphenol glycidyl ether and producing main ingredient, mixing hardening agent with main ingredient, adding tourmaline or ceramic, iron, aluminum and calcium after melting silicon compound, cooling, and mixing artificial mineral powder obtained by grinding ore lump obtained by cooling after melting again at high temperature; and    (3) formation method of thermal radiation layer structure involving forming vertical groove which has predetermined width and predetermined depth in thermal radiation layer after forming thermal radiation layer with fixed thickness in surface of heat-resistant case for viscous coating material obtained by mixing main ingredient, hardening agent and artificial mineral powder.    DESCRIPTION OF DRAWING(S) - The drawing shows a front view of the electric vehicle applied with thermal radiation coating material to case outer wall surfaces of motor and generator. (Drawing includes non-English language text).    Thermal radiation coating material (11)    Battery (12)    Generator (13)    Motor (14)    Gear box (15)