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Temperature measurement method based on silver-lithium alloy

A technology of temperature measurement and lithium alloy, which is applied in thermometers, thermometers with physical/chemical changes, measuring devices, etc., to achieve the effect of transmitting signals without connection, free from environmental interference, and wide measurement range

Inactive Publication Date: 2021-04-13
SOUTHWESTERN INST OF PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem in the prior art that conventional temperature measurement methods such as thermocouples cannot be used to measure or evaluate the temperature of the environment more accurately in high-radiation environments such as reactor cores or other extreme environments, and provide A temperature measurement method based on silver-lithium alloy, which can accurately measure the ambient temperature to be measured in high-radiation environments such as reactor cores or other extreme environments

Method used

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  • Temperature measurement method based on silver-lithium alloy
  • Temperature measurement method based on silver-lithium alloy
  • Temperature measurement method based on silver-lithium alloy

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0040] The target temperature range of embodiment 1 temperature environment to be measured [A 1 ,A 2 ] to [350°C, 520°C] for temperature measurement

[0041] The target temperature range of the temperature environment to be measured [A 1 ,A 2 ] is [350°C, 520°C], adopt the silver-lithium alloy sample with high lithium content to measure the temperature of the environment to be measured. When the lithium content is high, the alloy will show a certain degree of corrosion on the quartz tube during the heating process. Therefore, in this embodiment, a corrosion-resistant metal tube is used as a sealed temperature measurement unit, and the silver-lithium alloy sample is processed into a cone shape. By measuring or calculating the change of the center of gravity position of the sealed temperature measuring unit equipped with the conical silver-lithium alloy sample, it is judged whether the silver-lithium alloy sample has been melted, and then the actual temperature of the tempera...

Embodiment 2

[0057] The target temperature range of embodiment 2 temperature environment to be measured [A 1 ,A 2 ] to [520°C, 950°C] for temperature measurement

[0058] The target temperature range of the temperature environment to be measured [A 1 ,A 2 ] is [520°C, 950°C], use the silver-lithium alloy sample with low lithium content to measure the temperature of the environment to be measured. When the lithium content is low, the silver-lithium alloy is brittle and less corrosive. Therefore, in this embodiment, a sealed tube made of quartz is used as a sealed temperature measurement unit, and the silver-lithium alloy sample is processed into a cylinder. By directly observing the cylinder The change of the diameter judges whether the silver-lithium alloy sample has melted, and then obtains the actual temperature of the temperature environment to be measured. Specific steps are as follows:

[0059] Step (1) Determine the range of the target temperature of the temperature environment ...

Embodiment 3

[0072] The target temperature range of the temperature environment to be measured in embodiment 3 [A 1 ,A 2 ] to [950°C, 962°C] for temperature measurement

[0073] The target temperature range of the temperature environment to be measured [A 1 ,A 2 ] is [950°C, 962°C], and the temperature of the environment to be measured is measured by using a silver-lithium alloy sample with extremely low lithium content. When the lithium content is extremely low, the silver-lithium alloy is soft, exhibits good toughness, and is less corrosive. Therefore, in this embodiment, a sealed tube made of quartz is used as a sealed temperature measurement unit, and the silver-lithium alloy sample is processed into a wire The actual temperature of the temperature environment to be measured can be judged by directly observing the fusing status of the filamentous silver-lithium alloy sample. Specific steps are as follows:

[0074] Step (1) Determine the range of the target temperature of the tempe...

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Abstract

The invention belongs to the technical field of reactor temperature measurement, and particularly relates to a temperature measurement method based on silver-lithium alloy; the method comprises the following steps: determining the range of a target temperature of an environment to be subjected to temperature measurement as [A1, A2]; determining the melting point range of a silver-lithium alloy sample to be [T1, T2]; selecting a melting point value every X DEG C, determining the component proportion of the silver-lithium alloy corresponding to the selected melting point value according to a corresponding silver-lithium alloy phase diagram, and preparing uniform silver-lithium alloy with different melting point values; processing the alloy into silver-lithium alloy samples with the same shape; sequentially putting the processed silver-lithium alloy samples into an environment to be subjected to temperature measurement, and measuring the temperature of the environment to be subjected to temperature measurement; and after the temperature measurement is finished, judging the actual melting states of the silver-lithium alloy samples with different melting point values, and determining the temperature interval of the environment to be subjected to temperature measurement. The method provided by the invention can accurately measure the temperature of the environment to be measured under high radiation or other extreme environments.

Description

technical field [0001] The invention belongs to the technical field of reactor temperature measurement, and in particular relates to a temperature measurement method based on silver-lithium alloy. Background technique [0002] Conventional temperature measurement generally uses mechanical thermometers, liquid thermometers, infrared rays or thermocouples, etc. for measurement. [0003] However, in high-radiation environments such as reactor cores or other extreme environments, these conventional temperature measurement methods may not be applicable due to space constraints, environmental influences, electromagnetic interference, inability to connect leads and transmit signals. Therefore, it is necessary to develop a new measurement method to measure and monitor the temperature in high-radiation environments such as reactor cores or other extreme environments. [0004] Silver-lithium alloy is a kind of homogeneous crystal alloy. Compared with other eutectic or homogeneous all...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/06
CPCG01K11/06
Inventor 谌继明郑鹏飞魏然李峰张归航徐莉莎刘星车通
Owner SOUTHWESTERN INST OF PHYSICS
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