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铝铜固定点黑体的温度值取值方法的研究

张婷婷 卢小丰 董亮 王皓

张婷婷,卢小丰,董亮,等. 铝铜固定点黑体的温度值取值方法的研究[J]. 计量科学与技术,2022, 66(7): 28-32, 69 doi: 10.12338/j.issn.2096-9015.2021.0581
引用本文: 张婷婷,卢小丰,董亮,等. 铝铜固定点黑体的温度值取值方法的研究[J]. 计量科学与技术,2022, 66(7): 28-32, 69 doi: 10.12338/j.issn.2096-9015.2021.0581
ZHANG Tingting, LU Xiaofeng, DONG Liang, WANG Hao. Study on the Method of Determining the Temperature Value of the Al-Cu Fixed Point Blackbody[J]. Metrology Science and Technology, 2022, 66(7): 28-32, 69. doi: 10.12338/j.issn.2096-9015.2021.0581
Citation: ZHANG Tingting, LU Xiaofeng, DONG Liang, WANG Hao. Study on the Method of Determining the Temperature Value of the Al-Cu Fixed Point Blackbody[J]. Metrology Science and Technology, 2022, 66(7): 28-32, 69. doi: 10.12338/j.issn.2096-9015.2021.0581

铝铜固定点黑体的温度值取值方法的研究

doi: 10.12338/j.issn.2096-9015.2021.0581
基金项目: 国家重点研发计划项目(2018YFB2003104)。
详细信息
    作者简介:

    张婷婷(1994-),中国计量科学研究院助理研究员,研究方向:辐射测温,邮箱:2606254489@qq.com

    通讯作者:

    卢小丰(1979-),中国计量科学研究院副研究员,研究方向:辐射测温,邮箱:luxf@nim.ac.cn

Study on the Method of Determining the Temperature Value of the Al-Cu Fixed Point Blackbody

  • 摘要: 针对90国际温标(ITS90)中锌固定点(419.53℃)与铝固定点(660.32℃)之间温度间隔过大的问题,研制了Al-Cu固定点(Cu 33wt%,548.16℃)作为辅助固定点。通过自主研发的辐射温度计RT9032来测试Al-Cu固定点的熔化和凝固温度值。对于Al-Cu固定点温度值的选取采取熔化平台的平均值、拐点(Point of Inflection,POI)、上限温度点(Upper Limit,UL)三种方式。研究结果表明:不同的选取方式对于熔化温度并没有产生明显的差异,最大相差34mK,且Al-Cu固定点的重复性均在18mK以内,因此,Al-Cu固定点(熔点)可以作为ITS-90固定点以外的辅助固定点使用。
  • 图  1  坩埚的结构示意图

    Figure  1.  Schematic diagram of the structure of the crucible

    图  2  漏斗的结构示意图

    Figure  2.  Schematic diagram of the structure of the funnel

    图  3  内部材料布局图

    Figure  3.  Layout diagram of internal materials

    图  4  Al-Cu-0119的熔化曲线

    注:1、2、3和4分别为第一次测量、第二次测量、第三次测量和第四次测量

    Figure  4.  Melting curve of Al-Cu-0119

    图  5  Al-Cu-0219的熔化曲线

    注:1、2、3和4分别为第一次测量、第二次测量、第三次测量和第四次测量

    Figure  5.  Melting curve of Al-Cu-0219

    图  6  Al-Cu-0319的熔化曲线

    注:1和2分别为第一次测量、第二次测量

    Figure  6.  Melting curve of Al-Cu-0319

    图  7  Al-Cu-0219的熔化坪台

    Figure  7.  Melting plateau of Al-Cu-0219

    图  8  Al-Cu-0219的熔化坪台(黑色实线)、一阶导数 (红色实线)及三次方拟合曲线(蓝色划线)

    Figure  8.  Al-Cu-0219 melting plateau (black solid line), first derivative (red solid line) and cubic fitting curve (blue underline)

    图  9  Al-Cu-0219的熔化坪台(黑色实线)、POI处的切线(蓝色划线)以及外推线(棕色实线)

    Figure  9.  The melting plateau of Al-Cu-0219 (black solid line), the tangent line at the POI (blue underline) and the extrapolation line (brown solid line)

    图  10  不同取值方法获得的熔化值以及误差

    Figure  10.  Melting value and error obtained by different value determination methods

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出版历程
  • 录用日期:  2022-03-23
  • 网络出版日期:  2022-04-04
  • 刊出日期:  2022-08-04

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