The Thermal Conductivity of Magnesium Oxide Powder

  Magnesium oxide main parameters are as follows : lattice constant: a=4.212, molecular weight: 40.311, density (g/cm): 3.65, coefficient of thermal expansion (×10-7/℃)(25℃): 138, thermal conductivity(cal/cm/sec/℃)(25℃): 0.06, specific heat (cal/g.℃): 0.209, Mohs hardness: 5.5, refractive index : No=1.74(λ=0.633μ), light transmittance: the length of light waves 200-2000, transmittance 92%, micron transmittance is greater than 92%.

    Magnesium oxide can refine the thermal conductive filler, and even nanometer size. Not only make mechanical performance influence small, but also improve thermal performance. Such as high pure nano magnesium oxide which is produced by Hebei Meishen Chemical Technology Co.,LTD, having the characteristics of high purity, good whiteness, small particle size and particle size uniform. Thermal conductivity of magnesium oxide increased from 33W/(m.K) to 36W/(m . K). What is more, by adding 80% of high pure nano magnesium oxide in the PPS, thermal conductivity can up to 3.4W/m.K; adding 70% of AL2O3, thermal conductivity can reach 2.392W/m.K. Add 10% of high pure nano magnesium oxide into EVA solar film, the heat conduction performance, insulativity, degree of crosslinking and heat stability will improve in different degrees.