Porcelain enamel coatings for steel possess chemical and mechanical stability in various environments including acid, alkaline, high-temperature and harsh working conditions, and so are widely used for a variety of consumer applications and for the protection of steel in many industrial chemical applications [1-2]. One of their potential uses is production of high-temperature spectral selective material for concentrated solar-power receivers [3]. Concentrated solar power systems use solar absorbers to convert sunlight to thermal electric power. Solar-power applications require spectrally selective coatings that exhibit high solar absorptance, low thermal emittance [4], and excellent stability at elevated temperatures in ambient.