Cezairliyan Ared
Institute for Materials Research, National Bureau of Standards, Washington, D.C. 20234.
J Res Natl Bur Stand A Phys Chem. 1971 Nov-Dec;75A(6):565-571. doi: 10.6028/jres.075A.045.
Measurements of heat capacity, electrical resistivity, hemispherical total emittance, and normal spectral emittance of niobium in the temperature range 1500 to 2700 K by a subsecond duration pulse heating technique are described. Results obtained on the above properties are reported and are compared with those in the literature. A sharp increase in heat capacity above 2000 K was observed. Electrical resistivity showed a negative departure from linearity in the curve of electrical resistivity against temperature. Estimated inaccuracy of measured properties is: 2 percent for heat capacity, 0.5 percent for electrical resistivity, and 3 percent for hemispherical total and normal spectral emittances.
描述了通过亚秒级持续时间脉冲加热技术对铌在1500至2700 K温度范围内的热容量、电阻率、半球总发射率和法向光谱发射率进行的测量。报告了上述特性的测量结果，并与文献中的结果进行了比较。观察到在2000 K以上热容量急剧增加。电阻率在电阻率与温度的曲线上显示出与线性的负偏差。测量特性的估计误差为：热容量2%，电阻率0.5%，半球总发射率和法向光谱发射率3%。
