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 |