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Simultaneous Measurements of Heat Capacity, Electrical Resistivity, and Hemispherical Total Emittance by a Pulse
A Cezairliyan1, F Righini1, J L McClure1
1Institute for Materials Research, National Bureau of Standards, Washington, D.C. 20234.
Abstract:
Simultaneous measurements of heat capacity, electrical resistivity, and hemispherical total emittance of vanadium in the temperature range 1500 to 2100 K by a subsecond duration, pulse heating technique are described. The results are expressed by the relations: c = 56.34 - 3.839 × 10-2 T + 1.563 × 10-5 T 2 ρ = 8.794 + 6.282 × 10-2 T - 6.804 × 10-6 T 2 where c is in J · mol-1 · K-1, ρ is in 10-8 Ω · m, and T is in K. The values for the hemispherical total emittance are: 0.313 at 1900 K and 0.332 at 2000 K. Estimated inaccuracies of the measured properties are: 3 percent for heat capacity, 0.5 percent for electrical resistivity and 5 percent for hemispherical total emittance.
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