The International Committee for Weights and Measures (CIPM), at its meeting in October 2017, followed the recommendation of the Consultative Committee for Units (CCU) on the redefinition of the kilogram, ampere, kelvin and mole. For the redefinition of the kelvin, the Boltzmann constant will be fixed with the numerical value 1.380 649 × 10-23 J K-1. The relative standard uncertainty to be transferred to the thermodynamic temperature value of the triple point of water will be 3.7 × 10-7, corresponding to an uncertainty in temperature of 0.10 mK, sufficiently low for all practical purposes. With the redefinition of the kelvin, the broad research activities of the temperature community on the determination of the Boltzmann constant have been very successfully completed. In the following, a review of the determinations of the Boltzmann constant k, important for the new definition of the kelvin and performed in the last decade, is given.

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玻尔兹曼计划

国际计量委员会 (CIPM) 在 2017 年 10 月的会议上采纳了单位咨询委员会 (CCU) 的建议，重新定义了千克、安培、开尔文和摩尔。为了重新定义开尔文，玻尔兹曼常数将固定为数值1.380 649 × 10-23 J K-1。转换为水三相点热力学温度值的相对标准不确定度将为 3.7 × 10-7，对应于 0.10 mK 的温度不确定度，对于所有实际目的来说足够低。随着开尔文的重新定义，温度界关于确定玻尔兹曼常数的广泛研究活动已经非常成功地完成。下面回顾了玻尔兹曼常数 k 的测定，这对开尔文的新定义很重要，并且在过去十年中进行了测定。