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本发明介绍了一种测量高温的热电偶,这种热电偶的热电元件是由耐氧化的耐火材料制成。高温热电偶仅限于对于其热电稳定性没有很大的影响的环境中使用,这样在许多应用中使许多可采用材料受到了限制。例如,除了钼族元素之外,所有的金属都不能被用来制做在氧化环境中的高温热电偶;在强烈的还原环境中,金属中也仅有钨、钼、铼能显示出所需的化学稳定性。在过去当热电偶的使用环境不适当时,通常把热电偶元件装入耐火的金属保护套管中来使用,并同时加以惰性气体。当温度快速波动时采用保护套是不利的,因为这样会使热电偶对
The present invention describes a thermocouple for measuring high temperatures. The thermocouple thermocouple is made of an oxidation-resistant refractory material. High-temperature thermocouples are limited to use in environments where their thermoelectric stability is not greatly affected, thus limiting many of the available materials in many applications. For example, with the exception of molybdenum family elements, all metals can not be used to make high-temperature thermocouples in oxidizing environments; only tungsten, molybdenum, and rhenium can show the desired Chemical stability. In the past, when the thermocouple was used in an inappropriate environment, the thermocouple element was usually put into a refractory metal protective sleeve for use while being inerted. It is detrimental to use a protective cover when the temperature fluctuates rapidly as this will make the thermocouple pair