Spectral Emittance of Neodymium, Samarium, Erbium and Ytterbium Oxides at High Temperatures

摘要

Spectral emittance of solid specimens of Er2O3, Yb2O3, Sm2O3 and Nd2O3 was obtained by comparison of sample emission with the emission of a standard black body cavity maintained at the same sample true temperature. The spectral emittance has been characterized in a wavelength range of 0.4 - 5.0 micrometer and at sample temperatures from 1520K up to 1870K corresponding to surface radiation flux densitites of 10 - 50 W/sq cm. This flux density range is of practical interest for thermophotovoltaic energy conversion applications. Preliminary observations of spectral transmittance and reflectance are also reported. (Author)