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

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

张婷婷^1,,
卢小丰^1, ,,
董亮²,
王皓²

1.
中国计量科学研究院，北京 100029
2.
辽宁省计量科学研究院，沈阳 110004

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

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出版历程
- 录用日期: 2022-03-23
- 网络出版日期: 2022-04-04

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

1.
National Institute of Metrology, Beijing 100029, China
2.
Liaoning Institute of Metrology, Shenyang 110004, China

摘要

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。
- 计量学 /
- 测量 /
- Al-Cu固定点 /
- 辐射温度计 /
- 辐射测温
Abstract: Aiming at the excessive temperature interval between the zinc fixed point (419.53℃) and the aluminum fixed point (660.32℃) in the International Temperature Scale of 1990 (ITS-90), an Al-Cu fixed point (Cu 33wt%, 548.16℃) was developed as an auxiliary fixed point. Self-developed radiation thermometer RT9032 was used to test the melting and solidification temperature values of Al-Cu fixed points. For the determination of the Al-Cu fixed point temperature value, the average value of the melting plateau, the point of inflection (POI), and the upper limit (UL) temperature point were adopted. The research results showed that different determination methods do not produce significant differences for the melting temperature, with a maximum difference of 34 mK, and the repeatability of the Al-Cu fixed point is within 18 mK. Therefore, the Al-Cu fixed point (melting point) can be used as an auxiliary fixed point in addition to the ITS-90 fixed point.
- metrology /
- measurement /
- Al-Cu fixed point /
- radiation thermometer /
- radiation temperature measurement

HTML全文

图 1 坩埚的结构示意图

Figure 1. Schematic diagram of the structure of the crucible

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图 2 漏斗的结构示意图

Figure 2. Schematic diagram of the structure of the funnel

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图 3 内部材料布局图

Figure 3. Layout diagram of internal materials

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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

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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

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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

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图 7 Al-Cu-0219的熔化坪台

Figure 7. Melting plateau of Al-Cu-0219

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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)

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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)

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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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