흑색 코발트 태양 선택흡수막의 열퇴화

Abstract

Black cobalt solar selective coatings were prepared by using an electroplating method. The changes in the optical properties of the black cobalt selective coating due to thermal degradation were analyzed by using the Auger electron spectroscopy (AES) and spectrophotometer. The black cobalt selective coating was prepared on a copper substrate by using a synthesized electrolyte with and KSCN at a current density of for 45s ~ 60s. Its optical properties were a solar absorptance () of the order of 0.80 ~ 0.84 and a thermal emittance () of 0.01. From the AES depth profile analysis of heated sample, thermal degradation of the black cobalt selective coating heated for 33 hours at temperature of occurred primarily due to interdiffusion at interface of cobalt and copper substrate. This results were predictable that the decreases due to the thermal oxidation and diffusion.