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Proceedings Paper

Design and test of a new facility for assessing spectral normal emittance of solid materials at high temperature
Author(s): L. Mercatelli; M. Meucci; E. Sani
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Paper Abstract

The measurement of spectral emittance is a key topic in the study of new compositions, depositions and mechanical machining of materials for solar absorption and for renewable energies. In this work we report on the realization and testing of a new experimental facility for the measurement of directional spectral emittance which provides emittance spectral information in a controlled environment at medium-high temperatures up to 1300 K. The device is composed by a vacuum chamber with electrical heater optically connected with a visible and an FT-IR spectrometer. A split mirror permits to calibrate the system as it directs toward the detector the signal deriving from a calibrated blackbody. A ZnSe window allows to measure normal radiance in 0.6-17 μm spectral range. In this device the first test were carried out comparing the results obtained for HfC and TaB2 ultra-refractory ceramic samples to previous monochromatic measurements performed in a research solar furnace, obtaining a good agreement. Then, in order to confirm the reliability of the acquired spectral emittance curve, we compared it to that calculated from the room temperature spectrum in 2.5-17 μm spectral range, showing a similar spectral trend.

Paper Details

Date Published: 24 February 2016
PDF: 8 pages
Proc. SPIE 9744, Optical Components and Materials XIII, 97440H (24 February 2016); doi: 10.1117/12.2208334
Show Author Affiliations
L. Mercatelli, National Institute of Optics (Italy)
M. Meucci, National Institute of Optics (Italy)
E. Sani, National Institute of Optics (Italy)

Published in SPIE Proceedings Vol. 9744:
Optical Components and Materials XIII
Shibin Jiang; Michel J. F. Digonnet, Editor(s)

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