CN112649111A - Temperature measuring method based on silver-lithium alloy - Google Patents
Temperature measuring method based on silver-lithium alloy Download PDFInfo
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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 a silver-lithium alloy, which comprises the following steps: determining the target temperature range of the environment to be measured as [ A ]1,A2](ii) a Determining the melting point range of the silver-lithium alloy sample as [ T1,T2](ii) a Selecting a melting point value at every interval of X ℃, determining the component proportion of the silver-lithium alloy corresponding to the selected melting point value according to the corresponding silver-lithium alloy phase diagram, and preparing uniform silver-lithium alloys with different melting point values; processing the silver-lithium alloy sample into a silver-lithium alloy sample with the same shape; sequentially placing the processed silver-lithium alloy samples into an environment to be measured for temperature measurement, and measuring the temperature of the environment to be measured; and after the temperature measurement is finished, judging the actual melting state of the silver-lithium alloy samples with different melting point values, and determining the temperature interval of the environment to be measured. The method can accurately measure the temperature of the environment to be measured under high radiation or other extreme environments.
Description
Technical Field
The invention belongs to the technical field of reactor temperature measurement, and particularly relates to a temperature measurement method based on a silver-lithium alloy.
Background
Conventional thermometry is typically performed using a mechanical thermometer, a liquid thermometer, an infrared or thermocouple, or the like.
However, in high radiation environments such as reactor cores or other extreme environments, these conventional temperature measurement methods may not be used due to space limitations, environmental impact, electromagnetic interference, inability to connect out leads, and signal transmission. Therefore, a new measurement method is needed to measure and monitor the temperature in the high radiation environment of the reactor core or other extreme environments.
Compared with other eutectic or homogeneous alloys, the silver-lithium alloy has smaller difference between a solidus line and a liquidus line under the same composition, the melting point of the silver-lithium alloy continuously changes along with the change of the composition in a larger temperature interval, the silver-lithium alloy is basically not influenced by other conditions, and the melting point value of the silver-lithium alloy can be accurately determined through composition control.
Based on the situation, the invention develops a temperature measuring method based on the silver-lithium alloy, which is used for accurately measuring the temperature of the environment in high-radiation environment such as a reactor core or other extreme environments.
Disclosure of Invention
The invention aims to provide a temperature measuring method based on a silver-lithium alloy, aiming at solving the problem that the temperature of the environment can not be accurately measured or estimated by using conventional temperature measuring methods such as a thermocouple and the like under the high-radiation environment such as a reactor core and other extreme environments in the prior art, and the temperature of the environment to be measured under the high-radiation environment such as the reactor core and other extreme environments can be accurately measured.
The technical scheme for realizing the purpose of the invention is as follows: a method for temperature measurement based on a silver-lithium alloy, the method comprising the steps of:
step (1), determining the range of the target temperature of the environment to be subjected to temperature measurement as [ A ]1,A2]；
Step (2), determining the melting point range of the silver-lithium alloy sample as [ T ] according to the melting point values of the silver-lithium alloy with different components1,T2]；
Step (3) according to the melting point range [ T ] of the silver-lithium alloy sample1,T2]Selecting a melting point value at the interval value X ℃, determining the component proportion of the silver-lithium alloy corresponding to the selected melting point value according to the corresponding silver-lithium alloy phase diagram, and preparing uniform silver-lithium alloys with different melting point values according to the component proportion of the silver-lithium alloy;
step (4), processing the uniform silver lithium alloys with different melting point values prepared in the step (3) into silver lithium alloy samples with the same shape;
step (5), sequentially placing the silver-lithium alloy samples processed in the step (4) into an environment to be measured for temperature measurement, and measuring the temperature of the environment to be measured;
and (6) after the temperature measurement is finished, judging the actual melting state 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.
Further, the melting point range [ T ] of the silver lithium alloy sample in the step (2)1,T2]Range of target temperature [ A ] including environment to be measured1,A2]。
Further, the maximum melting point of the corresponding silver-lithium alloy sample in the extreme proportioning in the step (2) is the minimum value MIN and the maximum value MAX respectively, and the maximum melting point range of the silver-lithium alloy sample in the extreme proportioning is [ MIN, MAX [ ]]Melting point maximum value range [ MIN, MAX ] of extreme ratio silver-lithium alloy sample]Melting Point Range [ T ] of samples comprising an alloy of silver and lithium1,T2]。
Further, in the step (2), MIN is 180 ℃ and MAX is 962 ℃.
Further, in the step (3), the interval value X is 5, 10, 20, 50.
Further, the silver lithium alloy sample processed in the step (4) is conical, cylindrical and filamentous.
Further, the step (5) includes:
step (5.1), preparing a sealed temperature measuring unit according to the silver-lithium alloy sample processed in the step (4);
step (5.2), sequentially installing the silver-lithium alloy samples processed in the step (4) in a sealed temperature measuring unit;
and (5.3) putting all the sealed temperature measuring units provided with the silver-lithium alloy sample into the environment to be measured simultaneously, and measuring the temperature of the environment to be measured.
Further, after the silver-lithium alloy samples processed in the step (4) are sequentially installed in the sealed temperature measuring unit in the step (5.2), the sealed temperature measuring unit is set to be in a vacuum state or filled with inert gas.
Further, the step (6) is specifically: and taking out the sealed temperature measuring unit after the temperature measurement is finished, measuring the actual gravity center position of the sealed temperature measuring unit, comparing the actual gravity center position with the original gravity center position of the sealed temperature measuring unit measured before the temperature measurement is started, if the gravity center of the sealed temperature measuring unit containing the silver-lithium alloy sample with the melting point of x is changed to the maximum, the gravity center of the sealed temperature measuring unit containing the silver-lithium alloy sample with the melting point of y is not changed, and the highest temperature range of the environment to be measured is [ x, y ].
Further, the step (6) is specifically: and taking out the sealed temperature measuring unit after the temperature measurement is finished, cutting the sealed temperature measuring unit in the hot chamber, and observing and recording the melting state of the silver-lithium alloy samples with different melting point values. If the alloy sample with the melting point of x is already melted, the alloy sample with the melting point of y is not melted, and the highest temperature range of the environment to be measured is [ x, y ].
The invention has the beneficial technical effects that:
1. the temperature measuring method based on the silver-lithium alloy utilizes the physical characteristic that the melting point of the silver-lithium alloy continuously changes along with the change of components in a certain interval, and determines that the target environment temperature is higher than or lower than the melting point according to a single alloy material, so that the range of the target environment temperature is determined according to the melting conditions of a series of alloy materials with different melting points;
2. the temperature measuring method based on the silver-lithium alloy takes the silver-lithium alloy as a temperature indicating material, and measures such as on-line monitoring or off-line collection of the melting state of the material by a gravity method, a direct observation method, a fusing method and the like are adopted, so that the temperature can be measured more accurately when the space, the environment and the like are limited and other testing methods cannot be used;
3. the temperature measuring method based on the silver-lithium alloy uses the silver-lithium alloy to measure the temperature of the target environment, is suitable for various extreme conditions, and has the advantages of small alloy material used for measurement, no environmental interference, no need of connecting wires to transmit signals and wide measuring range.
Drawings
FIG. 1 is a schematic structural diagram of a sealed temperature measuring unit for measuring a melting point by a gravity center method in embodiment 1 of the present invention;
FIG. 2 is a schematic structural diagram of a sealed temperature measuring unit for measuring a melting point by a shape observation method in embodiment 2 of the present invention;
FIG. 3 is a schematic structural diagram of a sealing temperature measurement unit for measuring a melting point by a fusing method in embodiment 3 of the present invention;
FIG. 4 is a phase diagram of Ag-Li (alloy) according to an embodiment of the present invention.
In the figure: 1. a silver lithium alloy sample; 2. a top sealing cover; 3. a bottom sealing cover; 4. and sealing the temperature measuring unit main body.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The silver-lithium alloy belongs to one kind of homogeneous crystal alloy, and has small difference between solidus line and liquidus line and melting point varying continuously with the composition in relatively great temperature range and no influence of other conditions.
Specifically, the melting point of the silver-lithium alloy continuously changes with changes in the component ratio, and if the component ratio of the silver-lithium alloy corresponding to the melting point is determined at different constant values within a certain range, the melting point also changes within a certain range. According to the query, the melting point of 100% lithium is 180 ℃, namely the minimum value MIN; 100% silver has a melting point of 961.78 deg.C, MAX. Therefore, the melting point of the alloy sample with extreme mixture ratio is in the range of the minimum value (MIN, MAX)]Set to [180 ℃,962 DEG C]At [180 ℃ C., 962 ℃ C.)]Selection of melting Point Range of alloy samples [ T ] within the Range1,T2]And making it include the range of target temperature of environment to be measured [ A ]1,A2]。
However, the content of lithium in the silver-lithium alloy greatly affects the properties of the alloy, so the melting point of the alloy is divided into three sections according to a phase diagram and experience, namely, the melting point of the alloy with higher lithium content, the melting point of the alloy with lower lithium content and the melting point of the alloy with extremely low lithium content.
The specific implementation mode is as follows:
example 1 target temperature Range [ A ] of temperature Environment to be measured1,A2]Is [350 ℃,520℃ ]]Measure the temperature of the object
Target temperature range [ A ] of environment to be measured1,A2]Is [350 ℃,520℃ ]]And a silver lithium alloy sample with higher lithium content is adopted to measure the temperature of the environment to be measured. When the lithium content is high, the alloy will show a certain corrosivity to the quartz tube in the temperature rising process, so that in the embodiment, the corrosion-resistant metal tube is used as the sealed temperature measuring unit, the silver-lithium alloy sample is processed into a cone shape, whether the silver-lithium alloy sample is molten or not is judged by measuring or calculating the change of the gravity center position of the sealed temperature measuring unit filled with the cone-shaped silver-lithium alloy sample, and the actual temperature of the environment to be measured is further obtained. The method comprises the following specific steps:
step (1) determining the range [ A ] of the target temperature of the environment to be measured according to the phase diagram and experience1,A2]Is [350 ℃,520℃ ]]。
Step (2), determining the melting point range [ T ] of the silver-lithium alloy according to the melting point value of the alloy with higher lithium content1,T2]Is [350 ℃,520℃ ]]。
Step (3), selecting a melting point value at intervals of 20 ℃ within the melting point range [ 350-520 ℃ ] of the silver-lithium alloy determined in step (2), wherein the melting point values are 350 ℃, 370 ℃, 390 ℃, 410 ℃,430 ℃, 450 ℃, 470 ℃, 490 ℃, 510 ℃ and 520 ℃ respectively; simultaneously determining the component proportion of the silver-lithium alloy corresponding to the selected melting point value according to the Ag-Li alloy phase diagram shown in figure 4, and preparing 10 uniform silver-lithium alloy samples corresponding to the melting point value according to the component proportion of the silver-lithium alloy; and simultaneously, the melting point of the alloy is checked and the precision is confirmed, so that the observation error of the melting temperature of the measured sample is controlled within 5 ℃.
And (4) processing the uniform alloy with different melting point values prepared in the step (3) into a conical silver-lithium alloy sample and marking, wherein the diameter of the bottom of the conical silver-lithium alloy sample is 5mm, and the height of the conical silver-lithium alloy sample is 5 mm.
And (5) sequentially putting the silver-lithium alloy sample processed in the step (4) into an environment to be measured according to the melting point value from low to high, and measuring the temperature of the environment to be measured.
And (5.1) preparing a sealed temperature measuring unit according to the silver-lithium alloy sample processed in the step (4).
And preparing a sealed temperature measuring unit by adopting a corrosion-resistant metal pipe according to the quantity of the selected silver-lithium alloy. As shown in FIG. 1, the sealed temperature measuring unit of this embodiment is a cylindrical structure, and includes a sealed temperature measuring unit main body 4, a top sealing cover 2 and a bottom sealing cover 3, wherein the inner diameter of the bottom edge is 5mm, the height is 10mm, and the wall thickness is 1.5 mm.
And (5.2) sequentially placing the silver-lithium alloy samples processed in the step (4) into a sealed temperature measuring unit from low to high according to the melting point value.
As shown in FIG. 1, the processed cone-shaped silver-lithium alloy sample is installed in the sealed temperature measuring unit, the tip of the installed cone-shaped silver-lithium alloy sample 1 points to the center of the bottom sealing cover 3, the upper end of the cone-shaped silver-lithium alloy sample 1 is fixed at the upper end inside the sealed temperature measuring unit main body 4, and the cone-shaped silver-lithium alloy sample 1 and the cylindrical sealed temperature measuring unit main body 4 are coaxially arranged. The upper end and the lower end of a cylindrical sealed temperature measuring unit main body 4 are respectively sealed by a top sealing cover 2 and a bottom sealing cover 3 to form a sealed temperature measuring unit, and the sealed temperature measuring unit is set to be in a vacuum state and used for preventing chemical reactions, such as high-temperature oxidation, of the silver-lithium alloy sample. Marking the sealed temperature measuring unit, testing or calculating the gravity center of the sealed temperature measuring unit as the original gravity center before starting temperature measurement, and measuring the gravity center from the bottom of the cavity endThe measurement records the original gravity center position as L1Dot for comparison.
In addition, the gravity center of the whole sealed temperature measuring unit filled with the alloy sample is ensured to be the geometric center of the sealed temperature measuring unit, the change of the gravity center of the sealed temperature measuring unit is used as the judgment basis of the melting state of the alloy sample, and the melting point is detected, so that the actual melting point data is corrected.
And (5.3) putting all the sealed temperature measuring units with the conical silver-lithium alloy samples installed into the environment to be measured simultaneously, and measuring the temperature of the environment to be measured.
After the temperature measurement in the step (6) is finished, all the sealed temperature measuring units put in the step (5.3) are taken out and the actual gravity center positions of the sealed temperature measuring units are respectively measured, and the actual gravity center positions are recorded as L by measuring from the bottom of the cavity end2And (4) comparing the points with the original gravity center positions tested or calculated in the step (5.2).
If the actual center of gravity L is measured2At the original center of gravity L1Upper end, i.e. L2≥L1Indicating that the fuse is not melted; otherwise, if the measured actual center of gravity is at the lower end of the original center of gravity, i.e. L2<L1Then, it indicates that the fuse has melted.
If the center of gravity of the sealed temperature measuring unit containing the silver-lithium alloy sample with the melting point of x, for example, x being 390 ℃, is changed most, and the center of gravity of the sealed temperature measuring unit containing the silver-lithium alloy sample with the melting point of y, for example, y being 430 ℃, is not changed, the highest temperature range of the environment to be measured is 390 ℃,430 ℃.
And then, the temperature measurement precision of the environment to be measured is improved by reducing the interval range between adjacent melting points and repeating the steps.
Example 2 target temperature Range [ A ] of temperature Environment to be measured1,A2]Is [520 ℃,950℃ ]]Measure the temperature of the object
Target temperature range [ A ] of environment to be measured1,A2]Is [520 ℃,950℃ ]]And adopting a silver-lithium alloy sample with lower 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 has low corrosivity, so the sealed tube prepared by quartz is adopted in the embodimentThe temperature measuring unit is used as a sealing temperature measuring unit, the silver lithium alloy sample is processed into a cylinder, whether the silver lithium alloy sample is molten or not is judged by directly observing the change of the diameter of the cylinder, and then the actual temperature of the environment to be measured is obtained. The method comprises the following specific steps:
step (1) determining the range [ A ] of the target temperature of the environment to be measured according to the phase diagram and experience1,A2]Is [520 ℃,950℃ ]]。
Step (2), determining the melting point range [ T ] of the silver-lithium alloy according to the melting point value of the alloy with lower lithium content1,T2]Is [520 ℃,950℃ ]]。
Step (3), selecting a melting point value at every 50 ℃ within the melting point range [520 ℃,950 ℃) of the silver-lithium alloy determined in the step (2), wherein the melting point values are 520 ℃,570 ℃, 620 ℃, 670 ℃, 720 ℃, 770 ℃, 820 ℃, 870 ℃, 920 ℃ and 950 ℃; simultaneously determining the component proportion of the silver-lithium alloy corresponding to the selected melting point value according to the Ag-Li alloy phase diagram shown in figure 4, and preparing 10 uniform silver-lithium alloy samples corresponding to the melting point value according to the component proportion of the silver-lithium alloy; and simultaneously, the melting point of the alloy is checked and the precision is confirmed, so that the observation error of the melting temperature of the measured sample is controlled within 5 ℃.
And (4) processing the uniform alloy with different melting point values prepared in the step (3) into a cylindrical silver-lithium alloy sample and marking, wherein the diameter of the cylindrical silver-lithium alloy sample is 5mm, and the height of the cylindrical silver-lithium alloy sample is 5 mm.
And (5) sequentially putting the silver-lithium alloy sample processed in the step (4) into an environment to be measured according to the melting point value from low to high, and measuring the temperature of the environment to be measured.
And (5.1) preparing a sealed temperature measuring unit according to the silver-lithium alloy sample processed in the step (4).
And preparing a sealed temperature measuring unit by adopting a quartz tube according to the quantity of the selected silver-lithium alloy. As shown in fig. 2, the sealed temperature measuring unit of this embodiment is a funnel-shaped structure, including the sealed temperature measuring unit main body 4 of integrated into one piece, sealed temperature measuring unit main body 4 includes superstructure and substructure, and superstructure's internal diameter is 6mm, and highly is 10mm, and substructure's internal diameter is 3mm, highly is 20mm, and superstructure and the holistic wall thickness of substructure are 1 mm.
And (5.2) sequentially placing the silver-lithium alloy samples processed in the step (4) into a sealed temperature measuring unit from low to high according to the melting point value.
As shown in fig. 2, the processed cylindrical silver-lithium alloy sample is installed in a sealed temperature measuring unit, the funnel-shaped sealed temperature measuring unit main body 4 is sealed at the top to form a sealed temperature measuring unit, and the sealed temperature measuring unit is set in a vacuum state for preventing the silver-lithium alloy sample from chemical reaction, such as high-temperature oxidation. And then marking the sealed temperature measuring unit.
And (5.3) putting all the sealed temperature measuring units with the cylindrical silver-lithium alloy sample installed into the environment to be measured simultaneously, and measuring the temperature of the environment to be measured.
And (6) after the temperature measurement is finished, taking out all the sealed temperature measuring units put in the step (5.3), cutting the sealed temperature measuring units in a hot chamber, and observing the melting states of the silver-lithium alloy samples with different melting point values.
If the diameter of the silver lithium alloy sample with the melting point of x, for example, x is 520 ℃ is already reduced to 3mm, the diameter of the silver lithium alloy sample with the melting point of y, for example, y is 570 ℃ is kept at 5mm, and the highest temperature range of the environment to be measured is [520 ℃,570 ℃ ].
And then, the temperature measurement precision of the environment to be measured is improved by reducing the interval range between adjacent melting points and repeating the steps.
Example 3 target temperature Range [ A ] of temperature Environment to be measured1,A2]Is [950 ℃,962 DEG C]Measure the temperature of the object
Target temperature range [ A ] of environment to be measured1,A2]Is [950 ℃,962 DEG C]And (3) carrying out temperature measurement on the environment to be measured by adopting a silver-lithium alloy sample with extremely low lithium content. When the content of lithium is extremely low, the silver-lithium alloy is soft, presents good toughness and is weak in corrosivity, so that the sealed tube prepared from quartz is used as the sealed temperature measuring unit, the silver-lithium alloy sample is processed into a filiform shape, and the filiform silver-lithium alloy sample is directly observedAnd judging the actual temperature of the environment to be subjected to temperature measurement according to the fusing condition. The method comprises the following specific steps:
step (1) determining the range [ A ] of the target temperature of the environment to be measured according to the phase diagram and experience1,A2]Is [950 ℃,962 DEG C]。
Step (2), determining the melting point range [ T ] of the silver-lithium alloy according to the melting point value of the alloy with extremely low lithium content1,T2]Is [950 ℃,962 DEG C]。
Step (3), selecting the melting point values of 950 ℃, 955 ℃ and 962 ℃ respectively within the melting point range [950 ℃,962 ℃ ] of the silver-lithium alloy determined in the step (2); meanwhile, according to the phase diagram of the Ag-Li alloy shown in FIG. 4 and experience, the corresponding lithium content in the silver-lithium alloy with the melting point of 950 ℃ is about 1.5 at.%, and the corresponding silver content in the silver-lithium alloy with the melting point of 962 ℃ is about 100 at.%; preparing 3 uniform silver-lithium alloy samples corresponding to the melting point value according to the component proportion of the silver-lithium alloy; and simultaneously, the melting point of the alloy is checked and the precision is confirmed, so that the observation error of the melting temperature of the measured sample is controlled within 3 ℃.
And (4) processing the uniform alloy with different melting point values prepared in the step (3) into a filiform silver-lithium alloy sample and marking, wherein the diameter of the filiform silver-lithium alloy sample is 0.5 mm.
And (5) sequentially putting the silver-lithium alloy sample processed in the step (4) into an environment to be measured according to the melting point value from low to high, and measuring the temperature of the environment to be measured.
And (5.1) preparing a sealed temperature measuring unit according to the silver-lithium alloy sample processed in the step (4).
And preparing a sealed temperature measuring unit by adopting a quartz tube according to the quantity of the selected silver-lithium alloy. As shown in FIG. 3, the sealed temperature measuring unit of this embodiment is a cylindrical structure, and includes a sealed temperature measuring unit main body 4, a top sealing cover 2 and a bottom sealing cover 3, wherein the inner diameter of the bottom edge is 5mm, the height is 10mm, and the wall thickness is 1 mm.
And (5.2) sequentially placing the silver-lithium alloy samples processed in the step (4) into a sealed temperature measuring unit from low to high according to the melting point value.
As shown in fig. 3, the processed filiform silver-lithium alloy sample is respectively wound on the rods in the sealed temperature measuring unit, the upper end and the lower end of the cylindrical sealed temperature measuring unit main body 4 are respectively sealed by the top sealing cover 2 and the bottom sealing cover 3 to form the sealed temperature measuring unit, and the sealed temperature measuring unit is set in a vacuum state or filled with inert gas, such as argon, for preventing the silver-lithium alloy sample from generating chemical reaction, such as high-temperature oxidation. And then marking the sealed temperature measuring unit.
And (5.3) putting all the sealed temperature measuring units wound with the filiform silver-lithium alloy sample into an environment to be measured simultaneously, and measuring the temperature of the environment to be measured.
And (6) after the temperature measurement is finished, taking out all the sealed temperature measuring units put in the step (5.3), cutting the sealed temperature measuring units in a hot chamber, and observing the melting state of the filiform silver-lithium alloy samples with different melting point values.
If the melting point x is x, for example, the silver-lithium alloy wire sample with x equal to 955 ℃ is melted, the silver-lithium alloy wire sample with the melting point y equal to 962 ℃ is not melted, and the highest temperature range of the environment to be measured is [955 ℃,962 ℃).
And then, the temperature measurement precision of the environment to be measured is improved by reducing the interval range between adjacent melting points and repeating the steps.
The present invention has been described in detail with reference to the drawings and examples, but the present invention is not limited to the examples, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention. The prior art can be adopted in the content which is not described in detail in the invention.
Claims (10)
1. A method for measuring temperature based on a silver-lithium alloy, characterized in that it comprises the following steps:
step (1), determining the range of the target temperature of the environment to be subjected to temperature measurement as [ A ]1,A2]；
Step (2), determining the melting point range of the silver-lithium alloy sample as [ T ] according to the melting point values of the silver-lithium alloy with different components1,T2]；
Step (3) according to the melting point range [ T ] of the silver-lithium alloy sample1,T2]Selecting a melting point value at the interval value X ℃, determining the component proportion of the silver-lithium alloy corresponding to the selected melting point value according to the corresponding silver-lithium alloy phase diagram, and preparing uniform silver-lithium alloys with different melting point values according to the component proportion of the silver-lithium alloy;
step (4), processing the uniform silver lithium alloys with different melting point values prepared in the step (3) into silver lithium alloy samples with the same shape;
step (5), sequentially placing the silver-lithium alloy samples processed in the step (4) into an environment to be measured for temperature measurement, and measuring the temperature of the environment to be measured;
and (6) after the temperature measurement is finished, judging the actual melting state 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.
2. The method for measuring the temperature based on the silver-lithium alloy as claimed in claim 1, wherein the melting point range [ T ] of the silver-lithium alloy sample in the step (2)1,T2]Range of target temperature [ A ] including environment to be measured1,A2]。
3. The method according to claim 1, wherein the melting point of the silver-lithium alloy sample in the step (2) is at a minimum value MIN and a maximum value MAX, and the melting point of the silver-lithium alloy sample in the extreme mixture ratio is at a maximum value MAX and a minimum value MIN, MAX]Melting point maximum value range [ MIN, MAX ] of extreme ratio silver-lithium alloy sample]Melting Point Range [ T ] of samples comprising an alloy of silver and lithium1,T2]。
4. The method for measuring the temperature of the silver-lithium alloy as claimed in claim 3, wherein MIN in step (2) is 180 ℃ and MAX is 962 ℃.
5. The silver-lithium alloy-based temperature measurement method according to claim 1, wherein the value X of the interval in the step (3) is 5, 10, 20 or 50.
6. The method for measuring the temperature based on the silver-lithium alloy according to claim 1, wherein the silver-lithium alloy sample processed in the step (4) is conical, cylindrical and filiform.
7. The silver-lithium alloy-based temperature measurement method according to claim 1, wherein the step (5) comprises:
step (5.1), preparing a sealed temperature measuring unit according to the silver-lithium alloy sample processed in the step (4);
step (5.2), sequentially installing the silver-lithium alloy samples processed in the step (4) in a sealed temperature measuring unit;
and (5.3) putting all the sealed temperature measuring units provided with the silver-lithium alloy sample into the environment to be measured simultaneously, and measuring the temperature of the environment to be measured.
8. The silver-lithium alloy-based temperature measurement method according to claim 7, wherein in the step (5.2), after the silver-lithium alloy sample processed in the step (4) is sequentially installed in the sealed temperature measurement unit, the sealed temperature measurement unit is set to be in a vacuum state or filled with inert gas.
9. The silver-lithium alloy-based temperature measurement method according to claim 1, wherein the step (6) is specifically as follows: and taking out the sealed temperature measuring unit after the temperature measurement is finished, measuring the actual gravity center position of the sealed temperature measuring unit, comparing the actual gravity center position with the original gravity center position of the sealed temperature measuring unit measured before the temperature measurement is started, if the gravity center of the sealed temperature measuring unit containing the silver-lithium alloy sample with the melting point of x is changed to the maximum, the gravity center of the sealed temperature measuring unit containing the silver-lithium alloy sample with the melting point of y is not changed, and the highest temperature range of the environment to be measured is [ x, y ].
10. The silver-lithium alloy-based temperature measurement method according to claim 1, wherein the step (6) is specifically as follows: and taking out the sealed temperature measuring unit after the temperature measurement is finished, cutting the sealed temperature measuring unit in the hot chamber, and observing and recording the melting state of the silver-lithium alloy samples with different melting point values. If the alloy sample with the melting point of x is already melted, the alloy sample with the melting point of y is not melted, and the highest temperature range of the environment to be measured is [ x, y ].
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4080203A (en) * | 1976-12-29 | 1978-03-21 | The United States Of America As Represented By The Secretary Of The Air Force | Silver base brazing alloy |
| US20150092811A1 (en) * | 2013-09-24 | 2015-04-02 | Worcester Polytechnic Institute | Nanoparticles-Based Taggant Systems and Methods |
| RU164970U1 (en) * | 2016-02-20 | 2016-09-27 | Федеральное Государственное унитарное предприятие "Уральский электромеханический завод" | DEVICE FOR CONTROL OF THERMOINDICATOR ALLOYS |
| CN111912542A (en) * | 2020-07-02 | 2020-11-10 | 核工业西南物理研究院 | Temperature measuring method based on antimony-containing alloy |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4080203A (en) * | 1976-12-29 | 1978-03-21 | The United States Of America As Represented By The Secretary Of The Air Force | Silver base brazing alloy |
| US20150092811A1 (en) * | 2013-09-24 | 2015-04-02 | Worcester Polytechnic Institute | Nanoparticles-Based Taggant Systems and Methods |
| RU164970U1 (en) * | 2016-02-20 | 2016-09-27 | Федеральное Государственное унитарное предприятие "Уральский электромеханический завод" | DEVICE FOR CONTROL OF THERMOINDICATOR ALLOYS |
| CN111912542A (en) * | 2020-07-02 | 2020-11-10 | 核工业西南物理研究院 | Temperature measuring method based on antimony-containing alloy |
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