Thermal conductivity of aluminum at different temperatures Junjie Chen Department of Energy and Power Engineering, School of Mechanical and Power Engineering, Henan Polytechnic University, 2000 Century Avenue, Jiaozuo, Henan, 454000, P.R. China Contributor: Junjie Chen, ORCID: 0000-0002-5022-6863, E-mail address: koncjj@gmail.com The thermal conductivities of common substances span at least four orders of magnitude. Gases generally have low thermal conductivity, and pure metals have high thermal conductivity. For example, under standard conditions the thermal conductivity of copper is over ten thousand times that of air. Of all materials, allotropes of carbon, such as graphite and diamond, are usually credited with having the highest thermal conductivities at room temperature. The thermal conductivity of natural diamond at room temperature is several times higher than that of a highly conductive metal such as copper. The effect of temperature on thermal conductivity is different for metals and nonmetals. In metals, heat conductivity is primarily due to free electrons. Thermal conductivity (watts per meter-kelvin), Temperature (degrees kelvin) 4510 6 5150 7 5730 8 6220 9 6610 10 6900 11 7080 12 7150 13 7130 14 7020 15 6840 16 6350 18 5650 20 4000 25 2850 30 2100 35 1600 40 1250 45 1000 50 670 60 500 70 400 80 340 90 300 100 247 150 237 200 235 250 236 273 237 300 240 350 240 400 237 500 232 600 226 700 220 800 213 900

Contributor: Junjie Chen, ORCID: 0000-0002-5022-6863, E-mail address: koncjj@gmail.com, Department of Energy and Power Engineering, School of Mechanical and Power Engineering, Henan Polytechnic University, 2000 Century Avenue, Jiaozuo, Henan, 454000, P.R. China