Normal spectral emissivity of niobium (at 900 nm) by a pulse-heating reflectometric technique

被引：34

作者：

Righini, F ^{[1
]}

Spisiak, J ^{[1
]}

Bussolino, GC ^{[1
]}

机构：

[1] CNR, Inst Metrol G Colonnetti, I-10135 Turin, Italy

来源：

INTERNATIONAL JOURNAL OF THERMOPHYSICS | 1999年 / 20卷 / 04期

关键词：

high temperatures; niobium; normal spectral emissivity; pulse heating; reflectometric techniques; refractory metals; transient techniques;

D O I：

10.1023/A:1022602820071

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The normal spectral emissivity of niobium strip specimens was measured using a new pulse-heating reflectometric technique. The hemispherical spectral reflectivity of the surface of a strip tangent to an integrating sphere is determined by a high-speed lock-in technique. At the same time, the radiance temperature of the strip is measured by high-speed pyrometry from approximately 1000 K to the melting point. Details of the measurement method and of the related calibration techniques are reported. Results of the normal spectral emissivity of niobium at 900 nm from room temperature to its melting point are presented discussing differences related to the heating rate and to surface conditions.

引用

页码：1095 / 1106

页数：12

共 10 条

[1] Simultaneous measurements of normal spectral emissivity by spectral radiometry and laser polarimetry at high temperatures in millisecond-resolution pulse-heating experiments: Application to molybdenum and tungsten [J].