Thermal conductivity by a pulse-heating method: Theory and experimental apparatus

Righini, F.; Bussolino, G. C.; Rosso, Alberto; Roberts, R. B.

doi:10.1007/bf01184333

Cited by 23 publications

(8 citation statements)

References 6 publications

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“…Schematic diagram of a tubular specimen and configuration of the two pyrometers, one for measurement of the black-body temperature of the specimen, the other for measurement of the temperature profile of the specimen surface[16]. Dimensions are not to scale.…”

mentioning

confidence: 99%

Electron Density Control Using Fast Gas Puffing in Reversed-field Pinch Device, TPE-RX

Sakakita¹,

Yagi²,

Koguchi³

et al. 2004

Jpn. J. Appl. Phys.

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A brief summary is given of the developments in optical techniques for rapid temperature measurement during the last three decades in two national laboratories, the National Institute of Standards and Technology in the USA and the Istituto di Metrologia "G. Colonnetti" in Italy. Results of research conducted in originating and advancing the state-of-the-art in high-speed (millisecond-and microsecond-resolution) pyrometry for measurement of temperatures in the range 1000 K to 5000 K are discussed. The main emphasis is on several key issues related to high-speed pyrometry including: high-speed operation, calibration of pyrometers, determination of true temperature and high-temperature reference points. Anticipated future directions in research, developments and applications in high-speed pyrometry are briefly discussed.

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mentioning

confidence: 99%

Electron Density Control Using Fast Gas Puffing in Reversed-field Pinch Device, TPE-RX

Sakakita¹,

Yagi²,

Koguchi³

et al. 2004

Jpn. J. Appl. Phys.

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“…One of the most interesting scientific possibilities is the extension of the method to the measurement of other thermophysical properties. At the IMGC this has already been done using high-speed scanning pyrometry [15] and developing measurement techniques for both thermal expansion [16] and thermal conductivity [17] using tubular specimens. In the future similar experiments might be performed using strip specimens and the fast reflectometric technique.…”

Section: Future Possibilitiesmentioning

confidence: 99%

Evaluation of a Pulse-Heating Reflectometric Technique

Righini

2006

Int J Thermophys

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The classical millisecond-resolution pulse-heating method makes use of tubular specimens with a rectangular blackbody hole for accurate measurements of several thermophysical properties at high temperatures. An alternative measurement technique that uses simple strip specimens has been developed at the IMGC (Italy). The normal spectral emissivity of the pulse-heated strip is measured by integrating sphere reflectometry, using a modulated laser beam to discriminate between the reflected radiation and that self-emitted by the specimen. After a brief description of the measurement system and a review of the main experimental results, attention is devoted to current developments and possible improvements of the method, with particular attention to experiments performed at the melting point. The measurement technique is analyzed and evaluated, with a brief description of potential future measurement possibilities.

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“…An alternative thermal expansion measurement technique was realized at the IMGC, measuring interferometrically the longitudinal expansion of the nonuniform specimen and simultaneously its temperature profile by high-speed scanning pyrometry [11]. A technique for measuring thermal conductivity under dynamic conditions using scanning pyrometry was also proposed [12].…”

Section: New Measurement Techniquesmentioning

confidence: 99%

The Role of National Measurement Institutes in Subsecond Current-Heating Methods

Righini

Matsumoto²

2005

Int J Thermophys

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The historical role of three national measurement institutes (NMIs), namely, the NBS-NIST (USA), the IMGC (Italy), and the NRLM-NMIJ (Japan), in the development of different pulse-heating methods is reviewed. In relation to their institutional interests, the indicated NMIs were mainly interested in the development and application of new measurement techniques, in the accurate measurement of thermophysical properties at high temperatures, and in the characterization of possible reference materials. An informal intercomparison of published experimental results obtained via pulse-heating techniques over 30 years on the electrical resistivity and heat capacity of niobium, molybdenum, and tungsten is presented, comparing these results with recommended curves from the literature. Good agreement is found among the pulse-heating results from the indicated NMIs, always within the combined uncertainties.

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Thermal conductivity by a pulse-heating method: Theory and experimental apparatus

Cited by 23 publications

References 6 publications

Electron Density Control Using Fast Gas Puffing in Reversed-field Pinch Device, TPE-RX

Electron Density Control Using Fast Gas Puffing in Reversed-field Pinch Device, TPE-RX

Evaluation of a Pulse-Heating Reflectometric Technique

The Role of National Measurement Institutes in Subsecond Current-Heating Methods

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