Ultra-High Temperature Ceramics for solar receivers: spectral and high-temperature emittance characterizationE. Sani, L. Mercatelli, D. Jafrancesco, J. L. Sans and D. ScitiJ. Eur. Opt. Soc.-Rapid Publ., 7 (2012) 12052DOI: https://doi.org/10.2971/jeos.2012.12052