A cobalt–carbon eutectic fixed point for the calibration of contact thermometers at temperatures above 1100 °C
A cobalt–carbon eutectic fixed point for the calibration of contact thermometers at temperatures above 1100 °C
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用于在 1100 °C 以上温度下校准接触式温度计的钴-碳共晶固定点
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
A. C. Baratto
中科院分区：
文献类型：
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作者：
F. Edler;A. C. Baratto
在 PTB 构建了垂直钴碳 (Co-C) 共晶定点池，以证明其可用于改进 1100°C 以上温度下贵金属热电偶的校准。使用 Pt/Pd 热电偶在 PTB 和 INMETRO（巴西）的不同高温炉中测量了 Co-C 共晶的熔化和凝固温度，以显示其稳定性。所有在熔化曲线拐点处测量的电动势的再现性约为0.06℃。没有观察到熔化温度的漂移。因此，Co-C 共晶定点池可用作在铜冰点以上的温度范围内传播 1990 年国际温标 (ITS-90) 的充分传输标准。
A vertical cobalt–carbon (Co–C) eutectic fixed point cell was constructed at PTB to demonstrate its use for improvement of the calibration of noble-metal thermocouples at temperatures above 1100 °C. The melting and freezing temperatures of the Co–C eutectic were measured in different high-temperature furnaces at PTB and INMETRO (Brazil) to show its stability by using a Pt/Pd thermocouple. The reproducibility of all measured electromotive forces at the inflection points of the melting curves amounts to a value of about 0.06 °C. No drift in the melting temperature was observed. Therefore, the Co–C eutectic fixed point cell can be used as an adequate transfer standard for dissemination of the International Temperature Scale of 1990 (ITS-90) in the temperature range above the freezing point of copper.