Tungsten-Rhenium Thermocouples in Air and Characterization of Thermal Emf Stability

Tungsten- rhenium thermocouples in order to solve the problems encountered in actual use , the paper discusses the tungsten rhenium thermocouple temperature stability in air law . The results showed that : tungsten rhenium thermocouples as a result of a very complete oxidation of the material properties undergone a sea change , which led to the thermoelectric properties with the corresponding radical change ; for the first time revealed the stability of tungsten- rhenium thermocouples poles at different temperatures are different ; discovered tungsten rhenium thermocouple having a volume resistivity and thermoelectric properties of both mutations and thus , by measuring the change in resistance to predict its lifetime . Results of this study for the production of tungsten- rhenium thermocouples and provides a theoretical basis for the rational use .

Tungsten- rhenium thermocouples fifties developed excellent refractory metal thermocouples , is currently more than 1800 ℃ can be measured to a better industrial thermocouples. Since platinum-rhodium thermocouple prices, user urgent need to find alternative products, resulting in oxidation of tungsten rhenium thermocouples very active in the development , the current temperature is hot research field . Now, the country has produced various forms of anti-oxidation of tungsten rhenium thermocouples few thousand a year to expend in metallurgy , building materials, petrochemical and other industries , and showed a broad application prospects . The reserves and production of tungsten are in the world, but also about antioxidant tungsten rhenium thermocouples and consumable tungsten rhenium thermocouples development and application is also a leader in the world . In order to solve the tungsten rhenium thermocouple problems in practical use , it has been explored in a non- oxidizing atmosphere stability, but in an oxidizing atmosphere stability has not been reported , which is an antioxidant tungsten rhenium thermocouple emergence of new issues , with a clear theoretical significance and practical value.


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