CN111912542A - Temperature measuring method based on antimony-containing alloy - Google Patents
Temperature measuring method based on antimony-containing alloy Download PDFInfo
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Abstract
The invention belongs to the technology of reactor temperature measurement, and particularly relates to a temperature measurement method based on antimony-containing alloy. The method indirectly measures the temperature of the reactor under extreme conditions by utilizing the physical characteristic that the melting point of the antimony-containing alloy continuously changes in a certain interval along with the change of components, and selects a sample by adjusting the interval of the melting point value to realize more accurate temperature interval determination. The material involved in the measurement has small volume, is not interfered by electromagnetism, does not need to be connected with a wire to transmit signals, and is suitable for various severe conditions.
Description
Technical Field
The invention belongs to a reactor temperature measuring technology, and particularly relates to a temperature measuring method for a reactor core in a high-radiation environment or other extreme environments.
Background
The conventional temperature measuring methods are generally liquid thermometers, mechanical thermometers, thermocouples or infrared rays, and the like, and the use of the conventional measuring methods is limited under some special conditions. In environments such as narrow space, isolated space, various radiation, etc., these temperature measurement methods may not be used due to problems such as large volume, poor environmental resistance, electromagnetic interference, inability to connect out leads, inability to transmit signals, etc., and it is necessary to develop a new measurement method for measuring and monitoring temperatures in these situations.
There are many kinds of antimony-containing alloys, such as lead antimony alloy, bismuth antimony alloy, germanium antimony alloy, etc., which relate to eutectic alloy and homogeneous alloy, the melting point of which continuously changes with the change of composition within a large temperature range, is not substantially affected by other conditions, and can be accurately determined by composition control.
Disclosure of Invention
The invention aims to provide a temperature measuring method based on antimony-containing alloy, which can be used for accurately monitoring the temperature of a reactor core in high-radiation environment or other extreme environments.
The technical scheme of the invention is as follows:
a temperature measuring method based on antimony-containing alloy comprises the following steps:
1) determining upper and lower limit values of a target temperature of the measurement environment as a1 and a 2;
2) inquiring the melting point values of the alloy component proportions under two extreme proportions to determine the melting point range of the sample;
the antimony-containing alloy comprises metal M and metal antimony, the melting point values corresponding to two extreme proportions are MIN and MAX, and the melting point ranges [ O1 and O2] are selected within the range of [ MIN and MAX ] so that [ O1 and O2] contain the target temperature range [ A1 and A2 ];
3) selecting different melting point values at equal intervals, and determining the component proportion of the antimony alloy corresponding to each melting point value;
4) preparing the antimony-containing alloy with different component ratios in the step 3);
5) preparing antimony-containing alloys with different component ratios into samples with the same shape and marking;
6) putting the sample into an environment to be measured, and sealing the sample in vacuum or protective atmosphere;
7) and identifying the actual melting state of each sample in the step 6), thereby obtaining the temperature interval of the environment to be measured.
And 3) uniformly selecting different melting point values at intervals in step 3), wherein the interval values are 10, 20, 25 or 50.
The antimony-containing alloy is bismuth-antimony alloy, and the temperature range of the reactor core to be measured is (300 ℃,600 ℃).
The temperature measuring steps are as follows:
1) a1 and A2 are 300 ℃ and 600 ℃ respectively;
2) the MIN and the MAX are respectively determined to be 271 ℃ and 630 ℃, and the melting point range of the bismuth-antimony alloy sample, namely [ O1, O2] is determined to be [300 ℃,600 ℃;
3) inquiring a phase diagram, and determining the bismuth-antimony alloy with different proportional components corresponding to the melting points of 300 ℃, 350 ℃, 400 ℃, 450 ℃, 500 ℃, 550 ℃ and 600 ℃ respectively;
4) preparing the bismuth-antimony alloy in the step 3);
5) preparing bismuth-antimony alloys with different proportion components in the step 4) to prepare the same structure;
6) and respectively carrying out melting point identification on the structures in the step 5) to obtain a temperature interval of the environment to be detected.
The step 6) specifically comprises the following steps:
6.1) processing each alloy in 5) into a cylinder with the diameter of 1mm and the height of 2 mm;
6.2) each cylinder is separately fixed in each irradiation sealing tube and is filled with argon for protection;
6.3) loading the irradiation sealing pipes into a reactor core together with other materials to be irradiated for irradiation;
6.4) after the irradiation is finished, taking out the sealed tube, cutting the sealed tube in a hot chamber, observing the melting state of each cylinder, and if the cylinder with the melting point of a is molten and the cylinder with the melting point of b is not molten, the highest temperature of the reactor core in the experimental process is in the range from a to b.
6. The temperature measurement method based on the antimony-containing alloy as claimed in claim 4, wherein the step 6) specifically comprises:
6.1) processing the same number of sealing tubes according to the number of the selected bismuth-antimony alloy samples, wherein the gravity center of the sealing tubes is a geometric center;
6.2) processing the bismuth-antimony alloy samples with the component ratios into cone samples with the bottom diameter of 2mm and the height of 2.5mm, namely fuses;
6.3) Forming a sealed temperature measuring Unit
Cone samples are respectively arranged in a sealing tube to form a sealing temperature measuring unit, and mark marking is carried out according to different internal fuse wire materials;
6.4) fixing the sealed temperature measuring unit to a temperature measuring position for irradiation;
6.5) after the experiment is finished, taking out the sealed temperature measuring unit, and measuring the actual gravity center position of the sealed temperature measuring unit.
6.6) determining the fuse State
If the actual center of gravity is at the upper end of the original center of gravity, the fuse wire is not melted; if the actual center of gravity is at the lower end of the original center of gravity, the fuse wire is molten;
6.7) if the fuse having the melting point of a is melted and the fuse having the melting point of b is not melted, the core temperature is in the interval from a to b.
The sealed tube comprises a sealed tube main body, an upper end cover and a lower end cover, the cone sample is arranged in the sealed tube main body, the tip end of the cone sample faces the center of the lower end cover of the sealed tube, the upper end of the cone sample is fixed at the upper end inside the sealed tube main body, the cone sample and the cylindrical sealed tube main body are coaxially arranged, and the upper end and the lower end of the cylindrical sealed tube main body are respectively sealed by the upper end cover and the lower end cover to form a sealed temperature measuring unit.
The diameter of the bottom edge of the sealing tube is 2.5mm, the height of the sealing tube is 5mm, the wall thickness of the sealing tube is 0.2mm, and the diameter of the bottom of the cone sample is 2mm, and the height of the cone sample is 2.5 mm.
The antimony-containing alloy is germanium-antimony alloy, and the temperature range of the reactor core to be measured is [590 ℃,940 ℃).
1) According to the Sb-Ge alloy phase diagram, determining the content of antimony in a molar ratio of 0-85%, and determining the melting points of the Sb-Ge alloy, namely MIN and MAX, corresponding to the upper limit and the lower limit of the ratio;
2) determining the melting point change interval value to be 20 ℃, and determining the corresponding melting point values to be 590 ℃, 610 ℃, 630 ℃, 650 ℃, 670 ℃, 690 ℃, 710 ℃, 730 ℃, 750 ℃, 770 ℃, 790 ℃, 810 ℃, 830 ℃, 850 ℃, 870 ℃,890 ℃, 910 ℃ and 930 ℃;
3) preparing Sb-Ge alloy samples with different proportions corresponding to the melting point values;
4) processing each sample into a cylinder with the diameter of 1mm and the height of 2 mm;
5) filling each cylindrical sample into a metal sealing tube, and filling inert gas or vacuum packaging;
6) placing the sealed tube filled with the sample into an environment to be measured;
7) and (3) taking out the sealing pipe after the temperature measurement is finished, detecting the melting state of each sample material, and if the cylinder with the melting point of a is molten and the cylinder with the melting point of b is not molten, keeping the highest temperature of the reactor core in the range from a to b in the experimental process.
11. The temperature measurement method based on the antimony-containing alloy as claimed in claim 9, characterized in that the temperature measurement step is as follows:
1) according to the Sb-Ge alloy phase diagram, determining the content of antimony in a molar ratio of 0-85%, and determining the melting points of the Sb-Ge alloy, namely MIN and MAX, corresponding to the upper limit and the lower limit of the ratio;
2) determining the melting point change interval value to be 10 ℃, and determining the corresponding melting point values to be 590 ℃,600 ℃, 610 ℃, 620 ℃, 630 ℃, …,890 ℃, 900 ℃, 910 ℃, 920 ℃ and 930 ℃;
3) preparing Sb-Ge alloy samples with different proportions corresponding to the melting point values;
4) processing each sample into a cylinder with the diameter of 1mm and the height of 2 mm;
5) filling each cylindrical sample into a metal sealing tube, and filling inert gas or vacuum packaging;
6) placing the sealed tube filled with the sample into an environment to be measured;
7) and (3) taking out the sealing pipe after the temperature measurement is finished, detecting the melting state of each sample material, and if the cylinder with the melting point of a is molten and the cylinder with the melting point of b is not molten, keeping the highest temperature of the reactor core in the range from a to b in the experimental process.
The invention has the following remarkable effects: by utilizing the physical characteristic that the melting point of the antimony-containing alloy continuously changes in a certain interval along with the change of components, a single material can determine that the ambient temperature is higher or lower than the melting point, and the interval of the ambient temperature can be determined by forming an array by a plurality of materials with different melting points. By using the principle, the bismuth-antimony alloy is used as a temperature indicating material, and the temperature can be accurately measured when the space, the environment and the like are limited and other testing methods cannot be used by means of on-line monitoring or off-line collection of the melting state of the material and the like. The bismuth-antimony alloy or the germanium-antimony alloy is used for measuring the temperature, the measuring material is small in size, free of electromagnetic interference and free of connecting wires for signal transmission, and the measuring material is suitable for various severe conditions.
Drawings
FIG. 1 is a schematic view of a sealed temperature measuring unit;
in the figure: 1. an upper end cover; 2. a cone sample; 3. a sealing tube body; 4. and a lower end cover.
Detailed Description
The invention is further illustrated by the accompanying drawings and the detailed description.
1) The upper limit and the lower limit of the target temperature of the environment to be measured are set as A1 and A2, and the antimony-containing alloy species with the melting point variation range including the interval [ A1, A2] is selected.
The method is mainly aimed at measuring the internal temperature of the reactor core of the nuclear reactor or measuring the target temperature in specific environments such as ultra-high dose radiation, micro space and the like, and technical personnel in the field can master the upper limit value and the lower limit value of the target temperature through a conventional measuring method.
2) And inquiring the melting point range [ MIN, MAX ] of the alloy components under the two end point ratios, determining the melting point values corresponding to different components at even intervals according to the melting point end values, preparing the alloy with the corresponding component proportion, and ensuring that the temperature to be measured falls within the melting point variation range.
The melting point of the different components selected at intervals within a certain range may also vary within a certain range. The range of variation of the melting point needs to be satisfied;
assuming that the melting point of certain antimony alloy (metal M and metal antimony) is continuously changed with the change of the component ratio, the melting point of 100% b is assumed to be OM(MIN), melting point of 100% antimony was queried to be 630 deg.C (MAX); in [ O ]M,630℃]The range of variation of the melting point is selected so that it encompasses the above-mentioned target temperature range [ A1, A2]]；
3) Selecting different melting point values at equal intervals, and inquiring a phase diagram to determine the component proportion of the antimony alloy corresponding to each melting point value;
in [ O ]M,630℃]Selecting a plurality of evenly spaced melting point values in the range, wherein the range between the upper limit and the lower limit is [ O1, O2]]So that [ O1, O2]]Including the target temperature range [ A1, A2]]；
Uniformly setting melting point values at intervals, and inquiring the corresponding alloy component proportion;
typically O1 is the closest OMO2 is an integer of 10 less than 630;
the interval value may be 10, 20, 25 or 50;
4) preparing the antimony-containing alloy with different component ratios in the step 3), and carrying out melting point inspection;
preparing the alloy corresponding to each melting point value, and inspecting the melting point;
5) respectively manufacturing the antimony-containing alloy materials with different component ratios in the step 4) into the same specific shape and marking;
after the melting point is checked to be consistent with the query melting point, the alloys with different component ratios are made into the same shape.
6) Putting the specific shapes made of the materials with the component proportions in the step 5) into the same environment to be tested, and sealing the environment in vacuum or protective atmosphere to avoid chemical reaction;
7) and 6) identifying the actual melting state of each specific character, thereby obtaining the temperature interval of the environment to be measured.
All the component proportions are in molar proportion.
The first embodiment is as follows: method for measuring internal temperature of nuclear reactor core by using bismuth-antimony alloy
The nuclear reactor of experimental nature leaves the pore at the reactor core and supplies other materials to carry out the irradiation experiment usefulness, and the pore diameter of comparatively central part only is centimetre level, and length is several meters, and the space is narrow and small, and is sealed relatively, still need divide into a plurality of sealed units even to receive the neutron of high dose and gamma ray irradiation for a long time, it is expensive, the degree of difficulty to construct dedicated thermocouple return circuit cost, and conventional temperature measurement means can't carry out effective monitoring to its temperature. The fuse material made of the antimony-containing alloy can accurately reverse the temperature in the pile by checking the melting state after the pile is discharged, has extremely small volume and saves expensive irradiation space.
1) Determining the temperature range of the reactor core as 300 ℃,600 ℃;
2) selecting a bismuth-antimony alloy, wherein the melting point of the bismuth-antimony alloy changes uniformly and continuously from 271 ℃ (the melting point of 100% bismuth) to 630 ℃ (the melting point of 100% antimony), and the change range of the bismuth-antimony alloy comprises the temperature change range in the step 1) of the embodiment;
3) inquiring a phase diagram, and determining the bismuth-antimony alloy with different proportional components corresponding to the melting points of 300 ℃, 350 ℃, 400 ℃, 450 ℃, 500 ℃, 550 ℃ and 600 ℃ respectively;
4) preparing the bismuth-antimony alloy in the step 3);
5) preparing bismuth-antimony alloys with different proportion components in the step 4) to prepare the same structure
6) Respectively carrying out melting point test on the structure in the step 5), and correcting temperature measurement data, and specifically comprising the following steps:
6.1) processing each alloy in 5) into a cylinder with the diameter of 1mm and the height of 2 mm;
6.2) each cylinder is separately fixed in each irradiation sealing tube and is filled with argon for protection;
6.3) loading the irradiation sealing pipes into a reactor core together with other materials to be irradiated for carrying out an irradiation experiment;
6.4) after the irradiation experiment is finished, taking out the sealing tube, cutting the sealing tube in a hot chamber, observing the melting state of each cylinder, and if the cylinder with the melting point of a is molten and the cylinder with the melting point of b is not molten, keeping the highest temperature of the reactor core in the interval from a to b in the experiment process;
for example, if a cylinder with a melting point of 400 ℃ is molten and a cylinder with a melting point of 450 ℃ is not molten, the maximum temperature of the reactor core during the experiment is within the range of 400 ℃ to 450 ℃;
the number of bismuth-antimony materials with different melting points can be further increased, the interval between adjacent melting points can be reduced, and the measurement precision of the highest irradiation temperature can be improved. For example, determining the corresponding bismuth-antimony alloy with different proportions of components when the melting point is 300 ℃, 325 ℃, 350 ℃, 375 ℃, 400 ℃, 425 ℃, 450 ℃, 475 ℃, 500 ℃, 525 ℃, 550 ℃, 575 ℃ and 600 ℃; repeating the steps 6.1) to 6.4) to obtain a more accurate temperature measurement interval.
Example two: nondestructive temperature determination method
Under the specific environment of ultra-high dose radiation, micro space and the like, the sealing tube is not suitable or difficult to cut, a funnel-shaped sealing tube can be used for loading fuse wire materials, after the temperature is over, a gravity test is carried out to reflect the melting condition of the fuse wire, and the reached temperature is further judged.
The difference from the first embodiment is that in the step 6), melting point tests are respectively carried out on bismuth-antimony alloys with different proportion components, and temperature measurement data are corrected;
6.1) according to the variety and the quantity of the selected bismuth-antimony alloy in each proportion, the sealing tube is processed by stainless steel, and the sealing tube comprises a sealing tube main body 3, an upper end cover 1 and a lower end cover 4, so that the gravity center is ensured to be the geometric center of the sealing tube. In this example, the diameter of the bottom side is 2.5mm, the height is 5mm, and the wall thickness is 0.2 mm.
6.2) processing the bismuth-antimony alloy with each component ratio into a cone sample 2 with the bottom diameter of 2mm and the height of 2.5mm, namely a fuse wire;
6.3) Forming a sealed temperature measuring Unit
The cone sample 2 is installed in the sealing tube main body 3 as shown in fig. 1, the tip of the cone sample 2 faces the center of the lower end cover 4 of the sealing tube, the upper end of the cone sample 2 is fixed at the inner upper end of the sealing tube main body 3, and the cone sample 2 and the cylindrical sealing tube main body 3 are coaxially arranged. The upper end and the lower end of a cylindrical sealing tube main body 3 are respectively sealed by an upper end cover 1 and a lower end cover 4 to form a sealing temperature measuring unit, and mark marking is carried out according to different internal fuse wire materials.
6.4) fixing the sealed temperature measuring unit to a temperature measuring position (reactor core) to carry out an irradiation experiment;
6.5) after the experiment is finished, taking out the sealed temperature measuring unit, and measuring the actual gravity center position of the sealed temperature measuring unit.
6.6) determining the fuse State
If the actual gravity center is at the upper end of the original gravity center (geometric gravity center), the fuse wire is not melted; if the actual center of gravity is at the lower end of the original center of gravity (geometric center of gravity), the fuse wire is molten;
6.7) if the fuse with the melting point of a is molten and the fuse with the melting point of b is not molten, the highest temperature of the core in the experimental process is in the range from a to b;
similarly, the measurement accuracy of the highest irradiation temperature can be improved by further increasing the number of bismuth-antimony materials with different melting points and reducing the interval between adjacent melting points.
Example three: germanium-antimony alloy for 590-940 ℃ temperature measurement
Aiming at the development of reactor materials with higher use temperature and other materials, the required temperature of the test may exceed the temperature measuring range of a bismuth-antimony fuse, and germanium-antimony alloy can be adopted to obtain wider temperature measuring capability. The temperature measurement process of the germanium-antimony alloy is increased, and the requirement of temperature test in a wider range is met.
1) Determining the temperature of a reactor core to be 590-940 ℃;
2) according to an Sb-Ge alloy phase diagram, wherein the content of antimony is in a range of 0-85% in terms of molar ratio, the content of antimony of each fuse material is increased by about 5% in an amplitude manner, and the melting point change value is 20 ℃;
3) according to the variation range of the component proportion in the 2, determining 18 corresponding melting point values, namely 590 ℃, 610 ℃, 630 ℃, 650 ℃, 670 ℃, 690 ℃, 710 ℃, 730 ℃, 750 ℃, 770 ℃, 790 ℃, 810 ℃, 830 ℃, 850 ℃, 870 ℃,890 ℃, 910 ℃ and 930 ℃; preparing corresponding 18 Sb-Ge alloy fuse samples;
4) performing melting point detection on the material prepared in the step 3) by taking solid phase generation as a judgment basis, and correcting actual melting point data;
5) processing the material in the step 4) into a cylinder with the diameter of 1mm and the height of 2 mm;
6) filling each sample in the step 5) into a metal sealing tube for testing, and filling inert gas or carrying out vacuum packaging;
7) the sealing tube in the step 6) is arranged in a temperature measuring environment together with a material to be measured;
8) after the temperature measurement, the sealing tube was taken out, and the melting state of each fuse material was detected, and the temperature interval was determined in the same manner as in the first example.
By increasing the number of germanium and antimony materials with different melting points and reducing the interval between adjacent melting points, the measurement precision of the highest irradiation temperature can be improved.
Claims (11)
1. A temperature measuring method based on antimony-containing alloy is characterized by comprising the following steps:
1) determining upper and lower limit values of a target temperature of the measurement environment as a1 and a 2;
2) inquiring the melting point values of the alloy component proportions under two extreme proportions to determine the melting point range of the sample;
the antimony-containing alloy comprises metal M and metal antimony, the melting point values corresponding to two extreme proportions are MIN and MAX, and the melting point ranges [ O1 and O2] are selected within the range of [ MIN and MAX ] so that [ O1 and O2] contain the target temperature range [ A1 and A2 ];
3) selecting different melting point values at equal intervals, and determining the component proportion of the antimony alloy corresponding to each melting point value;
4) preparing the antimony-containing alloy with different component ratios in the step 3);
5) preparing antimony-containing alloys with different component ratios into samples with the same shape and marking;
6) putting the sample into an environment to be measured, and sealing the sample in vacuum or protective atmosphere;
7) and identifying the actual melting state of each sample in the step 6), thereby obtaining the temperature interval of the environment to be measured.
2. The method of claim 1, wherein the temperature measurement is based on an antimony-containing alloy, and the method comprises the following steps: and 3) uniformly selecting different melting point values at intervals in step 3), wherein the interval values are 10, 20, 25 or 50.
3. A method for measuring temperature based on an antimony-containing alloy as claimed in claim 1 or 2, characterized in that: the antimony-containing alloy is bismuth-antimony alloy, and the temperature range of the reactor core to be measured is (300 ℃,600 ℃).
4. The temperature measurement method based on the antimony-containing alloy as claimed in claim 3, characterized in that the temperature measurement step is as follows:
1) a1 and A2 are 300 ℃ and 600 ℃ respectively;
2) the MIN and the MAX are respectively determined to be 271 ℃ and 630 ℃, and the melting point range of the bismuth-antimony alloy sample, namely [ O1, O2] is determined to be [300 ℃,600 ℃;
3) inquiring a phase diagram, and determining the bismuth-antimony alloy with different proportional components corresponding to the melting points of 300 ℃, 350 ℃, 400 ℃, 450 ℃, 500 ℃, 550 ℃ and 600 ℃ respectively;
4) preparing the bismuth-antimony alloy in the step 3);
5) preparing bismuth-antimony alloys with different proportion components in the step 4) to prepare the same structure;
6) and respectively carrying out melting point identification on the structures in the step 5) to obtain a temperature interval of the environment to be detected.
5. The temperature measurement method based on the antimony-containing alloy as claimed in claim 4, wherein the step 6) specifically comprises:
6.1) processing each alloy in 5) into a cylinder with the diameter of 1mm and the height of 2 mm;
6.2) each cylinder is separately fixed in each irradiation sealing tube and is filled with argon for protection;
6.3) loading the irradiation sealing pipes into a reactor core together with other materials to be irradiated for irradiation;
6.4) after the irradiation is finished, taking out the sealed tube, cutting the sealed tube in a hot chamber, observing the melting state of each cylinder, and if the cylinder with the melting point of a is molten and the cylinder with the melting point of b is not molten, the highest temperature of the reactor core in the experimental process is in the range from a to b.
6. The temperature measurement method based on the antimony-containing alloy as claimed in claim 4, wherein the step 6) specifically comprises:
6.1) processing the same number of sealing tubes according to the number of the selected bismuth-antimony alloy samples, wherein the gravity center of the sealing tubes is a geometric center;
6.2) processing the bismuth-antimony alloy samples with the component ratios into cone samples with the bottom diameter of 2mm and the height of 2.5mm, namely fuses;
6.3) Forming a sealed temperature measuring Unit
Cone samples are respectively arranged in a sealing tube to form a sealing temperature measuring unit, and mark marking is carried out according to different internal fuse wire materials;
6.4) fixing the sealed temperature measuring unit to a temperature measuring position for irradiation;
6.5) after the experiment is finished, taking out the sealed temperature measuring unit, and measuring the actual gravity center position of the sealed temperature measuring unit.
6.6) determining the fuse State
If the actual center of gravity is at the upper end of the original center of gravity, the fuse wire is not melted; if the actual center of gravity is at the lower end of the original center of gravity, the fuse wire is molten;
6.7) if the fuse having the melting point of a is melted and the fuse having the melting point of b is not melted, the core temperature is in the interval from a to b.
7. The method of claim 6, wherein the temperature measurement is based on an antimony-containing alloy, and the method comprises the following steps: the sealed tube include sealed tube main part (3), upper end cover (1) and bottom end cover (4), cone sample (2) locate in sealed tube main part (3), cone sample (2) most advanced towards sealed tube bottom end cover (4) center, cone sample (2) upper end is fixed in the inside upper end of sealed tube main part (3), and cone sample (2) and columniform sealed tube main part (3) coaxial setting, columniform sealed tube main part (3) upper and lower ends are sealed through upper end cover (1) and bottom end cover (4) respectively, become sealed temperature measurement unit.
8. The method of claim 6, wherein the temperature measurement is based on an antimony-containing alloy, and the method comprises the following steps: the diameter of the bottom edge of the sealing tube is 2.5mm, the height of the sealing tube is 5mm, the wall thickness of the sealing tube is 0.2mm, and the diameter of the bottom of the cone sample (2) is 2mm, and the height of the cone sample is 2.5 mm.
9. A method for measuring temperature based on an antimony-containing alloy as claimed in claim 1 or 2, characterized in that: the antimony-containing alloy is germanium-antimony alloy, and the temperature range of the reactor core to be measured is [590 ℃,940 ℃).
10. The temperature measurement method based on the antimony-containing alloy as claimed in claim 9, characterized in that the temperature measurement step is as follows:
1) according to the Sb-Ge alloy phase diagram, determining the content of antimony in a molar ratio of 0-85%, and determining the melting points of the Sb-Ge alloy, namely MIN and MAX, corresponding to the upper limit and the lower limit of the ratio;
2) determining the melting point change interval value to be 20 ℃, and determining the corresponding melting point values to be 590 ℃, 610 ℃, 630 ℃, 650 ℃, 670 ℃, 690 ℃, 710 ℃, 730 ℃, 750 ℃, 770 ℃, 790 ℃, 810 ℃, 830 ℃, 850 ℃, 870 ℃,890 ℃, 910 ℃ and 930 ℃;
3) preparing Sb-Ge alloy samples with different proportions corresponding to the melting point values;
4) processing each sample into a cylinder with the diameter of 1mm and the height of 2 mm;
5) filling each cylindrical sample into a metal sealing tube, and filling inert gas or vacuum packaging;
6) placing the sealed tube filled with the sample into an environment to be measured;
7) and (3) taking out the sealing pipe after the temperature measurement is finished, detecting the melting state of each sample material, and if the cylinder with the melting point of a is molten and the cylinder with the melting point of b is not molten, keeping the highest temperature of the reactor core in the range from a to b in the experimental process.
11. The temperature measurement method based on the antimony-containing alloy as claimed in claim 9, characterized in that the temperature measurement step is as follows:
1) according to the Sb-Ge alloy phase diagram, determining the content of antimony in a molar ratio of 0-85%, and determining the melting points of the Sb-Ge alloy, namely MIN and MAX, corresponding to the upper limit and the lower limit of the ratio;
2) determining the melting point change interval value to be 10 ℃, and determining the corresponding melting point values to be 590 ℃,600 ℃, 610 ℃, 620 ℃, 630 ℃, …,890 ℃, 900 ℃, 910 ℃, 920 ℃ and 930 ℃;
3) preparing Sb-Ge alloy samples with different proportions corresponding to the melting point values;
4) processing each sample into a cylinder with the diameter of 1mm and the height of 2 mm;
5) filling each cylindrical sample into a metal sealing tube, and filling inert gas or vacuum packaging;
6) placing the sealed tube filled with the sample into an environment to be measured;
7) and (3) taking out the sealing pipe after the temperature measurement is finished, detecting the melting state of each sample material, and if the cylinder with the melting point of a is molten and the cylinder with the melting point of b is not molten, keeping the highest temperature of the reactor core in the range from a to b in the experimental process.
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