High-Temperature Furnace Systems for Realizing Metal-Carbon Eutectic Fixed Points

Yamada, Yoshiro; Sasajima, N.; Gomi, Hideyuki; Sugai, T.

doi:10.1063/1.1627257

Cited by 12 publications

(15 citation statements)

References 1 publication

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“…NRC and VNIIOFI used a high-temperature blackbody furnace (the HTBB3500 made by VNIIOFI) for melting the cells [44,45]. PTB, NIM, CEM, NMIK (and NPL for the relative measurements) used a Chino IR-R80 furnace [46], and NIST and NMIA used a Thermogauge furnace [47]. LNE-Cnam used both a Chino IR-R80 and a VNIIOFI HTBB3200 furnace (with Cell C and Cell D in different furnaces), and used a homebuilt 3-zone furnace for the Cu cells.…”

Section: Furnace Effectmentioning

confidence: 99%

Thermodynamic temperature assignment to the point of inflection of the melting curve of high-temperature fixed points

Woolliams

Anhalt

Ballico

et al. 2016

Phil. Trans. R. Soc. A.

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The thermodynamic temperature of the point of inflection of the melting transition of Re-C, Pt-C and Co-C eutectics has been determined to be 2747.84 ± 0.35 K, 2011.43 ± 0.18 K and 1597.39 ± 0.13 K, respectively, and the thermodynamic temperature of the freezing transition of Cu has been determined to be 1357.80 ± 0.08 K, where the ± symbol represents 95% coverage. These results are the best consensus estimates obtained from measurements made using various spectroradiometric primary thermometry techniques by nine different national metrology institutes. The good agreement between the institutes suggests that spectroradiometric thermometry techniques are sufficiently mature (at least in those institutes) to allow the direct realization of thermodynamic temperature above 1234 K (rather than the use of a temperature scale) and that metal-carbon eutectics can be used as high-temperature fixed points for thermodynamic temperature dissemination. The results directly support the developing mise en pratique for the definition of the kelvin to include direct measurement of thermodynamic temperature.

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Section: Furnace Effectmentioning

confidence: 99%

Thermodynamic temperature assignment to the point of inflection of the melting curve of high-temperature fixed points

Woolliams

Anhalt

Ballico

et al. 2016

Phil. Trans. R. Soc. A.

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“…The HTFP cells were installed in an IR-R80 CHINO furnace [19].The furnace was baked, before the installation of the cells, with an Ar and He purge for about 1 h, at approximately 2300 K, for the Co-C, Pt-C and Ru-C cells and at 2800 K in the case of the Re-C. The cells were installed in the furnace wrapped in graphite felt (a different wrap for each cell).…”

Section: (C) Measurements At Cem (I) Operational Conditions and Furnamentioning

confidence: 99%

“…The furnace used for the measurements was a Nagano VR10-A2 (similar to the one described in [19]). For each fixed-point cell, the furnace was baked according to the protocol supplied with the cells on the day before the fixed-point cell installation and measurement.…”

Section: (D) Measurements At Ptb (I) Operational Conditions and Furnamentioning

confidence: 99%

“…The HTFP cells were implemented in a Chino IR-R80 furnace [19] with settings corresponding to +15 K to +25 K above the melting temperature. The furnace was baked prior to the installation of the cells and the order of the measurements was from the highest to the lowest temperature in the following sequence: Re-C, Ru-C, Pt-C and Co-C.…”

Section: (B) Measurements At Lne-cnam (I) Operational Conditions and Furnace Assemblymentioning

confidence: 99%

“…The HTFP cell measurements were carried out in a Chino furnace type IR-R80 [19]. The furnace was pre-treated in order to avoid contamination from graphite parts and insulation.…”

Section: (F) Measurements At Npl (I) Operational Conditions and Furnace Assemblymentioning

confidence: 99%

See 2 more Smart Citations

Dissemination of thermodynamic temperature above the freezing point of silver

Sadli¹,

Machin

Anhalt

et al. 2016

Phil. Trans. R. Soc. A.

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The mise-en-pratique for the definition of the kelvin at high temperatures will formally allow dissemination of thermodynamic temperature either directly or mediated through high-temperature fixed points (HTFPs). In this paper, these two distinct dissemination methods are evaluated, namely source-based and detector-based. This was achieved by performing two distinct dissemination trials: one based on HTFPs, the other based on absolutely calibrated radiation thermometers or filter radiometers. These trials involved six national metrology institutes in Europe in the frame of the European Metrology Research Programme joint project 'Implementing the new kelvin' (InK). The results have shown that both dissemination routes are possible, with similar standard uncertainties of 1-2 K, over the range 1273-2773 K, showing that, depending on the facilities available in the laboratory, it will soon be possible to disseminate thermodynamic temperatures above 1273 K to users by either of the two methods with uncertainties comparable to the current temperature scale.

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High-temperature measurement techniques for the application in photometry, radiometry and thermometry

Hartmann

2009

Physics Reports

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High-Temperature Furnace Systems for Realizing Metal-Carbon Eutectic Fixed Points

Cited by 12 publications

References 1 publication

Thermodynamic temperature assignment to the point of inflection of the melting curve of high-temperature fixed points

Thermodynamic temperature assignment to the point of inflection of the melting curve of high-temperature fixed points

Dissemination of thermodynamic temperature above the freezing point of silver

High-temperature measurement techniques for the application in photometry, radiometry and thermometry

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