Solar selective reflector materials: Another option for enhancing the efficiency of the high-temperature solar receivers/reactors

The cavity wall is an important part of a receiver in determining the efficiency. Using solar selective reflector (SSR) materials with low absorptivity and high thermal emissivity for design one efficient way to improve In this work, we present systematic study optical high-temperature stability performances six different SSR materials: refractory ceramic fiber based substrate material (Fiberfrax 140) five metallic oxide coatings which are prepared by mixing powders alumina, magnesium titanium dioxide commercial inorganic adhesives. was studied heating up keeping candidate atmospheric conditions at temperature 1250 °C 200 h. spectrum hemispherical reflectance band 0.25–25 ?m measured analyzing performance materials. obtained results show that all have good reflection characteristics, i.e, relatively emissivity. Especially, alumina coated shows excellent both reflection. reflectivity can reach 94.6%.