SPECTRAL EMISSIVITY, TOTAL EMISSIVITY, AND THERMAL CONDUCTIVITY OF MOLYBDENUM, TANTALUM, AND TUNGSTEN ABOVE 2300 K
SPECTRAL EMISSIVITY, TOTAL EMISSIVITY, AND THERMAL CONDUCTIVITY OF MOLYBDENUM, TANTALUM, AND TUNGSTEN ABOVE 2300 K
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DOI：
10.1063/1.1735847
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发表时间：
1960-08
影响因子：
3.2
通讯作者：
R. Allen;L. F. Glasier;P. L. Jordan
中科院分区：
文献类型：
--
作者：
R. Allen;L. F. Glasier;P. L. Jordan
测量了高纯电弧熔炼钼、钽和粉末冶金钽、钨在2300°K至其熔点之间的发射率和热导率。本文提出了一种通过测定作为热流率函数的电热棒中心亮度温度来测定光谱发射率和总发射率的方法。该方法不依赖于黑体条件的实验结果。光谱发射率也通过测量在各自熔点的亮度温度来确定。电热棒的导热系数由Jain和Krishnan纵向热流法确定。钽和钨的光谱发射率随温度的升高而线性下降。钼的光谱发射率是恒定的。钼、钽和钨的总发射率随着温度的升高而增加。对于任何一种金属，光谱分析...
The emissivities and thermal conductivities of high purity arc melted molybdenum and tantalum and powder metallurgy tantalum and tungsten were measured between 2300°K and their respective melting points. A method is presented for the determination of spectral and total emissivities from the determination of brightness temperature at the center of an electrically heated rod as a function of heat flow rate. The method does not depend on the experimental achievement of blackbody conditions. Spectral emissivities were also determined by measurement of brightness temperatures at the respective melting points. Thermal conductivities of electrically heated rods were determined by the Jain and Krishnan longitudinal heat flow method. The spectral emissivities of tantalum and tungsten decrease linearly with increase in temperature. The spectral emissivity of molybdenum is constant. The total emissivities of molybdenum, tantalum, and tungsten increase with increasing temperature. For any of the metals the spectral a...