A calibration method for high-temperature radiation thermometers based on the eutectic point of rhenium and carbon was adopted for radiation thermometers such as photoelectric pyrometers and infrared thermometers. The physical phenomenon of constant temperature during the eutectic process of rhenium and carbon was utilized to calibrate high-temperature radiation thermometers, raising the measurement uncertainty level to 1.6℃ (k=2), providing reliable data support for product test and design verification.

Ke Cao, Hui Yi, Jiangang Liu, Yuegang Ma, Bo Zhao, Yanlin Bai. Calibration Method of Radiation Thermometer Based on Rhenium-Carbon Eutectic Point. Academic Journal of Materials & Chemistry (2025), Vol. 6, Issue 3: 127-133. https://doi.org/10.25236/AJMC.2025.060317.

[1] Lu X F, Bai C Y,Wang J H, et al. A new calibration method for the tungsten ribbon lamp with working standards [J]. Acta Metrologica Sinica, 2012, 33(6A):58-60.

[2] JJG 1032-2007 Standard Photovoltaic High-Temperature Thermometer Calibration Regulations [S]. China Metrology Press, 2007.

[3] Lu X F,Yuan Z D,Dong W, et al. Application of high-temperature fixed-point calibration for precise photoelectric pyrometers [J]. Acta Metrologica Sinica, 2017(05).

[4] Lu X F,Yuan Z D,Dong W, et al. Transmission of International Temperature Scale above 961.78℃ using the 'Fixed Point-High Temperature Meter' Method[J]. Acta Metrologica Sinica, 2014, 35(3):193-197.

[5] Yamada Y, Sakate H, Sakuma F, et al. Radiometric observation of melting and freezing plateaus for a series of metal-carbon eutectic points in the range 1330 ℃ to 1950 ℃[J]. Metrologia, 1999,36(3):207-209.

[6] Woolliams E R, Machin, G, Lowe D H, et al. Metal (carbide)-carbon eutectics for thermometry and radiometry: a review of the first seven years[J]. Metrologia,2006,43(6):R11-R25.

[7] Machin G. Twelve years of high temperature fixed point research: A review[C]//AIP Conference Proceedings for ITS2012, USA, Los Angeles,2013.