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Автор E S Morgan
Дата выпуска 1968-11-01
dc.description The variation in thermoelectric power with stress of platinum and platinum/13% rhodium wires with junction temperatures of 20 and 550°C has been found to be -47 pv degc<sup>−1</sup> kg<sup>−1</sup> cm<sup>−2</sup> and - 12 pv degc<sup>−1</sup> kg<sup>−1</sup> cm<sup>−2</sup> respectively. These results enable the thermal e.m.f. hysteresis loop observed with some metal-sheathed mineral-insulated thermocouples to be explained and the maximum discrepancy produced by this loop has been calculated at 23 μv at 550°C. An experimentally determined result on a single thermocouple gave 14 μv. The mechanical hysteresis associated with the loop may lead to fatigue failure, and it is concluded that for a reliable thermocouple of this type the coefficients of expansion of the sheath and thermocouple materials must match.
Формат application.pdf
Издатель Institute of Physics Publishing
Название The effect of stress on the thermal e.m.f. of platinum-platinum/13% rhodium thermocouples
Тип paper
DOI 10.1088/0022-3727/1/11/305
Electronic ISSN 1361-6463
Print ISSN 0022-3727
Журнал Journal of Physics D: Applied Physics
Том 1
Первая страница 1421
Последняя страница 1429
Аффилиация E S Morgan; Central Electricity Research Laboratories, Leatherhead, Surrey
Выпуск 11

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