Study of refractive index variation of high K dielectric material magnesium oxide

The change of refractive index of magnesium oxide with uniaxial and biaxial pressurization was calculated by using the first nature principle, and it was found that the dielectric constant decreased by pressurization, and the biaxial pressurization changed magnesium oxide from negative uniaxial crystal to positive uniaxial crystal. Magnesium oxide has many excellent properties, such as electrical insulation, chemical inertness, mechanical stability, high temperature stability, thermal conductivity and high efficiency of secondary electron emission, and is widely used in many fields such as optical films, and high critical temperature superconducting buffer layers, large area flat panels, plasma display devices, high K insulating layer dielectric materials, etc. Magnesium oxide is chemically inert, with a forbidden band width of 7.8 eV and an intrinsic material permittivity of 9.8, and is selected as a high K dielectric material, which can be used in... High Purity Magnesium Oxide