三相点
镓
1990年国际温标
熔点
校准
材料科学
固定点
热力学
比例(比率)
温度标度
分析化学(期刊)
物理
化学
冶金
数学
色谱法
数学分析
复合材料
量子力学
作者
M. Borovička,Henry E. Sostman
摘要
The liquid–solid (melting) and liquid–solid–vapor (triple point) phase equilibrium temperatures of pure gallium have been realized and studied as proposed secondary reference points of the International Practical Temperature Scale. The melt temperature is found to be 29.771 94 °C (302.921 94 K) and the triple point temperature 29.773 88 °C (302.923 88 K) for gallium 99.999 99% pure. The technique and apparatus for these realizations, suitable for the calibration of high‐precision thermometers, are described. These calibration points are finding important uses in medical, biological, ecological, and energy‐source thermometry.
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