Thermoelectric Scanning Study of Pt/Pd and Au/Pt Thermocouples up to 960 °C with a Pressure Controlled Sodium Heat-Pipe

Gotoh, Masahiko

doi:10.1063/1.1627172

Cited by 6 publications

(7 citation statements)

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“…Furthermore, as the thermo-hydraulically linked components such as the evaporator and the compensation chamber were physically separated, the pressure change inside the compensation chamber using a heterogeneous control gas did not affect the intrinsic thermodynamic stability of the pressure-controlled LHP [7,8]. This was the most distinguishable feature of conventional gas pressure-controlled heat pipes, which required tedious procedures to prevent thermodynamic instability due to the presence of the different control gas from the working fluid [11][12][13].…”

Section: Realization Of Tin Freezing Point Using a Loop Heat Pipe-bas...mentioning

confidence: 99%

Realization of tin freezing point using a loop heat pipe-based hydraulic temperature control technique

2015

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Section: Realization Of Tin Freezing Point Using a Loop Heat Pipe-bas...mentioning

confidence: 99%

Realization of tin freezing point using a loop heat pipe-based hydraulic temperature control technique

2015

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“…So far, eutectics have been constructed by NMIJ [8,15,18], NPL [19], VNIIOFI [20,21], BNM-LNE [22], BNM-INM [23], BIPM [24], KRISS [25], PTB [26], NIST [27], Chino Corp [28] and Tamagawa University [29]. Figure 2 shows the basic design of a cell.…”

Section: Manufacture Of Fixed-point Cellsmentioning

confidence: 99%

Metal (carbide)–carbon eutectics for thermometry and radiometry: a review of the first seven years

et al. 2006

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Since 1999, when the first high temperature fixed-points based on the metal–carbon eutectic phase transitions were realized, more than 60 papers have been published on this topic. Eutectic based fixed-points are already being considered as secondary reference points for the International Temperature Scale and have been introduced into industrial laboratories. This rapid progress has been possible through the combined effort of scientists around the world, from national metrology institutes, universities and industry. It has been proposed that these fixed-points should be officially adopted as a way to improve the realization and dissemination of temperature scales above the silver point. In radiometry, the availability of stable high temperature fixed-points will give greater flexibility and at some wavelengths the potential for greater accuracy for spectral radiance and irradiance scale realization. This paper summarizes the major progress in eutectic research so far.

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“…The development of eutectics metal-carbon fixed points represents another interesting possibility of overcoming the need of a comparison with the radiation thermometer [4,5]. Co-C (1324 • C), Ni-C (1326 • C) and Pd-C (1504 • C) are some points that could be used to extend the fixed-point calibration above the copper point.…”

Section: Discussionmentioning

confidence: 99%

Facility for the calibration of Pt/Pd thermocouples in the temperature range from 960 °C to 1500 °C

Astrua¹,

Battuello²,

Girard³

2006

Meas. Sci. Technol.

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Five Pt/Pd thermocouples, constructed and calibrated at IMGC at fixed points in the temperature range from 0 °C to the Ag point, were calibrated by comparison with the local primary standard radiation thermometer with the aim of replacing the presently used Pt/Pt–Rh alloy thermocouples as secondary reference standards up to 1500 °C. To fully exploit accuracy of Pt/Pd thermocouples, high-level calibration techniques need to be adopted. For this purpose, a new high-temperature three-zone furnace was arranged and characterized in order to obtain the best axial uniformity and a specially designed blackbody cavity was used as a transfer source for calibrating the thermocouples in the temperature range from 962 °C up to 1500 °C. At the end of the comparison measurements, additional calibrations at the Ag fixed point were made, in order to check the stability of the thermocouples' signals. A comparison between experimental results and the reference function is presented and an extrapolation of the fixed-point calibration data is analysed.

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Thermoelectric Scanning Study of Pt/Pd and Au/Pt Thermocouples up to 960 °C with a Pressure Controlled Sodium Heat-Pipe

Cited by 6 publications

References 0 publications

Realization of tin freezing point using a loop heat pipe-based hydraulic temperature control technique

Realization of tin freezing point using a loop heat pipe-based hydraulic temperature control technique

Metal (carbide)–carbon eutectics for thermometry and radiometry: a review of the first seven years

Facility for the calibration of Pt/Pd thermocouples in the temperature range from 960 °C to 1500 °C

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