TELLURIUM-BISMUTH VACUUM RADIATION THERMOCOUPLE

Abstract
A simple method of constructing delicate radiation thermocouples with gold leaf receivers is described in detail. A tellurium wire ¼ mm long could be easily welded to the receiver by using a condenser discharge. The thermoelectric power of tellurium in its β-modification against bismuth is about 600 μv/°C. The thermocouples are about three times more sensitive than those made with bismuth alloy wires. Some methods for evacuating and permanently evacuating the thermocouples are given.

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