Investigation on emissive properties of peroskite-type oxide LSMO with grating surface

Abstract

This paper aims to investigate thermal radiative characteristics of thermochromic material La 0.825 Sr 0.175 MnO 3 (LSMO) with one-dimensional grating structured surfaces. The dielectric function of LSMO was calculated by K-K approach. Numerical calculation was conducted to obtain spectral emittance distribution of such surfaces with different structural parameters using the finite difference time domain (FDTD) method. It was found that the spectral emittance of LSMO structured surface exhibited the feature of selective enhancement due to the excitation of microcavity effect. The effects of structural parameters on spectral emittance indicated that the desired radiative enhancement could be achieved by the rational design of the structural parameters of grating. The temperature dependence of averaged emittance of LSMO was also calculated. The results showed that LSMO with grating structured surface had a better thermochromic performance compared with LSMO with smooth surface. grating, thermochromic materials, emission Citation:Huang J G, Xuan Y M, Li Q. Investigation on emissive properties of peroskite-type oxide LSMO with grating surface.

Thermally tunable metamaterial based on thermochromic effect

“…The dielectric parameters of LSMO at 250 and 295 K are cited from Ref. [15]. The optical parameters of Ag and MgF 2 scarcely show any changes with the temperature and thus can be assumed to be temperature independent.…”

“…Wang et al [13] obtained thermally tunable NIMs in the infrared region by anisotropic liquid crystal. Perovskite‐type manganese oxides doped with alkaline‐earth elements [14, 15] are typical thermochromic materials. In an appropriate range of doped alkaline‐earth elements, perovskite‐type manganese oxides show metal‐insulator transition in the vicinity of Curie temperature T C due to the double‐exchange interaction [14].…”

Correlations between High-Temperature Oxidation Kinetics and Thermal Radiation Characteristics of Micro-Structured Nickel Surfaces Oxidized at 1173 K

“…There is great interest in using microstructured surfaces to regulate the thermal radiation heat transfer in electronics, materials, and solar energy applications [14][15][16][17][18][19]. There are some useful ways to improve the micro-structured surfaces [20][21][22].…”

Temperature-dependent emissivity property in La0.7Sr0.3MnO3 films

“…Xuan [15,16,17,18] from the standpoint of surface structures attempt to improve the tunable emissivity properties of thermochromic material. J. Huang et al [15] calculated the spectral emissivity distribution of La 0.825 Sr 0.175 MnO 3 with one-dimensional grating structured surfaces using the finite difference time domain method.…”

“…Xuan [15,16,17,18] from the standpoint of surface structures attempt to improve the tunable emissivity properties of thermochromic material. J. Huang et al [15] calculated the spectral emissivity distribution of La 0.825 Sr 0.175 MnO 3 with one-dimensional grating structured surfaces using the finite difference time domain method. The results showed that the thermochromic performance of the material was improved by the structured surface, which have been demonstrated experimentally by means of photolithographic technique to construct a similar structured surface [16].…”