Realization of High-Temperature Reference Point of the Temperature Scale for the Phase Transition of a δMoC–C Metal-Carbon Compound.

Autor:	Khlevnoy, B. B., Grigor'eva, I. A., Ivashin, E. A., Ogarev, S. A., Sapritsky, V. I.
Předmět:	MOLYBDENUM PHASE transitions EUTECTIC alloys MOLYBDENUM alloys RADIATION sources LIGHT sources
Zdroj:	Measurement Techniques; Mar2019, Vol. 61 Issue 12, p1159-1165, 7p
Abstrakt:	We present the results of development of a prototype of cavity-type model of black body in the form of a graphite ampoule filled with a δMoC–C eutectic alloy of molybdenum with carbon that realizes a high-temperature reference point (HTRP) of 2856 K on the temperature scale. It is shown that the created ampoule may serve as a precision "type-A" optical radiation source. We justify the approaches to the evaluation of the uncertainty components of emissivity of the ampoule cavity equal to 0.9997 with an extended uncertainty of 0.00016 (k = 2) depending on the geometric and physical parameters with the help of numerical algorithms based on the Monte-Carlo method. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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