Normal spectral emissivity changes of tungsten at 633 nm in the range from room temperature to melting point under pulse-heating conditions

Chengwei Li; Fan Yi; Jingmin Dai

doi:10.1117/12.464341

20 September 2002 Normal spectral emissivity changes of tungsten at 633 nm in the range from room temperature to melting point under pulse-heating conditions

Chengwei Li, Fan Yi, Jingmin Dai

Author Affiliations +

Proceedings Volume 4927, Optical Design and Testing; (2002) https://doi.org/10.1117/12.464341
Event: Photonics Asia, 2002, Shanghai, China

Abstract

The classical steady-state technique for the measurement of thermophysical properties at high temperatures suffer from many limitations (for example, chemical reaction, evaporation, loss of mechanical strength, etc. may exist). These problems may be overcome by transient techniques of sub-second durations. Pulse-heating experiments were performed on tungsten strip specimen, taking the specimen from room temperature to the melting point based on rapid resistive self-heating of the specimen. The normal spectral emissivity of the specimen was measured by integrating sphere reflectometry developed at HIT. At the same time, the radiance temperature is measured by high-speed pyrometer from 1200K to the melting point. Details of the measurement technique, measurement apparatus and of the calibration technique are described. Results of the normal spectral emissivity of tungsten at 633nm from room temperature to melting point are presented and discussed.

Citation Download Citation

Chengwei Li, Fan Yi, and Jingmin Dai "Normal spectral emissivity changes of tungsten at 633 nm in the range from room temperature to melting point under pulse-heating conditions", Proc. SPIE 4927, Optical Design and Testing, (20 September 2002); https://doi.org/10.1117/12.464341

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available