Abstract
Pulse-heating experiments were performed on niobium strips, taking the specimens from room temperature to the melting point is less than one second. The normal spectral emissivity of the strips was measured by integrating sphere reflectometry, and, simultaneously, experimental data (radiance temperature, current, voltage drop) for thermophysical properties were collected with sub-millisecond time resolution. The normal spectral emissivity results were used to compute the true temperature of the niobium strips; the heat capacity, electrical resistivity, and hemispherical total emissivity were evaluated in the temperature range 1100 to 2700 K. The results are compared with literature data obtained in pulse-heating experiments. It is concluded that combined measurements of normal spectral emissivity and of thermophysical properties on strip specimens provide results of the same quality as obtained using tubular specimens with a blackbody. The thermophysical property results on niobium also validate the normal spectral emissivity measurements by integrating sphere reflectometry.
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REFERENCES
F. Righini, G. C. Bussolino, and A. Rosso, in Proceedings of TEMPMEKO'96, P. Marcarino, ed. (Levrotto & Bella, Torino, 1997), pp. 489–492.
F. Righini, J. Spišiak, and G. C. Bussolino, Int. J. Thermophys. 20:1095 (1999).
F. Righini, A. Rosso, and L. Coslovi, in Proc. Seventh Symp. Thermophys. Prop., A. Cezairliyan, ed. (ASME, New York, 1977), pp. 358–368.
F. Righini and A. Rosso, Measurement 1:79 (1983).
F. Righini, G. C. Bussolino, and A. Rosso, in Temperature. Its Measurement and Control in Science and Industry, Vol. 6, J. F. Schooley, ed. (American Institute of Physics, New York, 1992), pp. 763–768.
A. Cezairliyan, High Temp.-High Press. 4:453 (1972).
F. Righini, G. C. Bussolino, A. Rosso, and J. Spišiak, Int. J. Thermophys. 14:485 (1993).
H. Preston-Thomas, Metrologia 27:3 (1990).
IUPAC Commission on Atomic Weights, Pure Appl. Chem. 21:91 (1970).
F. Righini, J. Spišiak, G. C. Bussolino, and F. Scarpa, High Temp.-High Press. 29:473 (1997).
CIPM, BIPM Proc.-Verb. Com. Int. Poids Mesures 49:8, 26 (1981).
CIPM, BIPM Proc.-Verb. Com. Int. Poids Mesures 54:14, 35 (1986).
F. Righini, R. B. Roberts, and A. Rosso, Int. J. Thermophys. 6:681 (1985).
K. D. Maglic, N. Lj. Perovic, G. S. Vukovic, and Lj. P. Zekovic, Int. J. Thermophys. 15:963 (1994).
A. Cezairliyan, J. Res. Natl. Bur. Stand. (U.S.) 75A:565 (1971).
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Righini, F., Spišiak, J., Bussolino, G.C. et al. Thermophysical Properties by a Pulse-Heating Reflectometric Technique: Niobium, 1100 to 2700 K. International Journal of Thermophysics 20, 1107–1116 (1999). https://doi.org/10.1023/A:1022654804141
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DOI: https://doi.org/10.1023/A:1022654804141