Device for thermal transport measurement

Abstract

The present disclosure relates to a device for thermal transport measurement, comprising: a female seat for electrically and thermally connecting with a sample holder in a pluggable manner, the sample holder being electrically and thermally connected with a sample as a thermal transport measurement object for bearing the sample; and the shielding cover is in airtight connection with the female seat and is used for sealing the sample support and the sample in a vacuum environment and shielding heat radiation of an external environment to the sample.

Description

Technical Field

[0001] The present disclosure generally relates to a device for heat transport measurement, and more specifically, to a heat transport measurement device that is highly adaptable and pluggable and can operate in a low-temperature and strong magnetic field environment. Background Art

[0002] In material research, it is often necessary to measure the thermal transport properties of material samples in extreme environments such as low temperature and strong magnetic field. The measurement of the thermal transport properties of material samples is also referred to as "thermal transport measurement" in this disclosure. The low temperature environment can be achieved by, for example, liquid nitrogen, liquid helium or a compressor cold head, and the temperature can be as low as 30mK; the strong magnetic field environment can be achieved by, for example, electromagnets or superconducting magnets, and a magnetic field as high as 20T can be obtained. Accurate measurement of thermal transport properties such as thermal conductivity and thermoelectric coefficient of material samples in the above extreme environments is very difficult but very important.

[0003] At present, the more commonly used solution is to directly fix the material sample to be measured in the device for heat transport measurement. The "device for heat transport measurement" is also referred to as the "heat transport measurement device" in this disclosure. This solution faces the problems of complicated process of replacing material samples and poor expansibility of equipment functions. For example, each time a material sample is replaced, the heat transport measurement device cannot measure other material samples. Moreover, the heat transport measurement device has very strict requirements on the size of the material sample and can only measure material samples of fixed size, with extremely poor expansibility. Summary of the invention

[0004] An exemplary embodiment of the present disclosure provides a device for thermal transport measurement, comprising: a female seat, which is electrically and thermally connected to a sample holder in a pluggable manner, wherein the sample holder is electrically and thermally connected to a sample as a thermal transport measurement object, and is used to carry the sample; and a shielding cover, which is airtightly connected to the female seat, and is used to seal the sample holder and the sample in a vacuum environment, and to shield the sample from thermal radiation from the external environment.

[0005] In some exemplary embodiments, the working environment of the heat transport measurement is a temperature range of 30 mK to 350 K and a magnetic field strength range of 0 to 25 T.

[0006] In some exemplary embodiments, the sample holder has a needle, and the female holder has a groove for receiving the needle. When the needle is inserted into the groove, the sample holder and the female holder are electrically connected through the needle and the groove, and the supporting structure of the sample holder fits with the supporting structure of the female holder to achieve thermal connection.

[0007] In some exemplary embodiments, when the needle is inserted into the groove, the sample holder and the female holder are fixed to each other by a first fixing device.

[0008] In some exemplary embodiments, the outer side of the shielding cover is plated with a first metal material.

[0009] In some exemplary embodiments, the female base has a first flange structure, the shielding cover has a second flange structure, and the first flange structure and the second flange structure are fixed to each other by a second fixing device.

[0010] In some exemplary embodiments, a gap between the first flange structure and the second flange structure is filled with a second metal material.

[0011] In some exemplary embodiments, the female seat has a protruding structure, the shielding cover has a concave structure, and the female seat and the shielding cover are fixed to each other by inserting the protruding structure into the concave structure.

[0012] In some exemplary embodiments, a vacuum sealant is filled between the protruding structure and the recessed structure.

[0013] In some exemplary embodiments, when the female holder and the sample holder are in a pulled-out state, the female holder is used to be electrically and thermally connected to another sample holder in a pluggable manner.

[0014] The above and other features and advantages of the present disclosure will become apparent from the following description of specific embodiments with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The structure of a device for heat transport measurement according to an exemplary embodiment of the present disclosure is schematically shown.

[0016] Figure 2 The structure diagram schematically shows a female base and a sample holder in an inserted state according to an exemplary embodiment of the present disclosure.

[0017] Figure 3 The structure diagram schematically shows a mother base and a sample holder in a pulled-out state according to an exemplary embodiment of the present disclosure.

[0018] Figure 4 The connection structure diagram of the shielding cover and the female socket according to the exemplary embodiment of the present disclosure is schematically shown.

[0019] Figure 5 Another connection structure diagram of the shielding cover and the female socket according to an exemplary embodiment of the present disclosure is schematically shown. DETAILED DESCRIPTION

[0020] Below, the example embodiments according to the present disclosure will be described in detail with reference to the accompanying drawings. Note that the accompanying drawings may not be drawn to scale. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments of the present disclosure, and the present disclosure is not limited to the example embodiments described here.

[0021] The exemplary embodiment of the present disclosure provides a highly adaptable pluggable device for heat transport measurement. The heat transport measurement device according to the exemplary embodiment of the present disclosure can efficiently measure the heat transport properties of a material sample (hereinafter referred to as "sample") in a low temperature and strong magnetic field environment. According to the scheme of the heat transport measurement device of the exemplary embodiment of the present disclosure, the mother seat is connected to the sample holder in a pluggable manner, which can realize the rapid plugging and unplugging of the sample holder, so that the sample can be quickly replaced, and different sample holders can be replaced according to different samples.

[0022] Figure 1 Schematically shows a structural diagram of a device for heat transport measurement according to an exemplary embodiment of the present disclosure. Figure 1 As shown, the heat transport measurement device includes a mother base 20 and a shielding cover 30. The mother base 20 can be used to be electrically and thermally connected to the sample holder 10 in a pluggable manner. The sample holder 10 can be electrically and thermally connected to the sample as the heat transport measurement object, and is used to carry the sample. The shielding cover 30 can be airtightly connected to the mother base 20, and is used to seal the sample holder 10 and the sample in a vacuum environment, and shield the heat radiation of the external environment to the sample, so it can be called a "vacuum heat shielding cover". The heat transport measurement device according to the exemplary embodiment of the present disclosure can replace different types of sample holders, so as to support samples of different sizes and different measurement functions.

[0023] The heat transport measurement device according to the exemplary embodiment of the present disclosure is made of materials compatible with the extreme environment of low temperature and strong magnetic field, so as to ensure normal use in the extreme environment of low temperature and strong magnetic field. For example, the heat transport measurement device according to the exemplary embodiment of the present disclosure can measure the heat transport of samples in the working environment of the temperature range of 30mK to 350K and the magnetic field strength range of 0 to 25T.

[0024] As described above, the female base 20 can be electrically and thermally connected to the sample holder 10 in a pluggable manner. Figure 2 The structure diagram of the female seat and the sample holder in the inserted state according to the exemplary embodiment of the present disclosure is schematically shown. Figure 2As shown, the sample holder 10 has a needle 11 and a support structure 12, and the mother base 20 has a groove 21 and a support structure 22. The groove 21 and the needle 11 can be made of conductive metal or other materials, and the groove 21 can accommodate the needle 11. When the needle 11 is inserted into the groove 21, the sample holder 10 and the mother base 20 can be electrically connected through the needle 11 and the groove 21. Those skilled in the art can recognize that the layout of the groove 21 can include the layout of the needle 11 to accommodate the needle 11, and can but does not necessarily correspond to the layout of the needle 11 one by one. In other words, the layout of the groove 21 can be more than the needle 11. The support structure 12 of the sample holder 10 and the support structure 22 of the mother base 20 can be made of materials such as metal copper or ceramics with high thermal conductivity and high machinability. When the mother base 20 and the sample holder 10 are in an inserted state, the support structure 12 and the support structure 22 can fit together to achieve thermal connection between the mother base 20 and the sample holder 10.

[0025] Since the sample holder 10 can be electrically and thermally connected to the sample when carrying the sample, when the mother holder 20 and the sample holder 10 are in an inserted state, the mother holder 20 can also be electrically and thermally connected to the sample, thereby enabling measurements of the sample's temperature, thermoelectric signals, heater circuits, etc.

[0026] In some exemplary embodiments, when the mother base 20 and the sample holder 10 are in an inserted state, the sample holder 10 and the mother base 20 can be fixed to each other by a first fixing device such as a screw, so that the sample holder 10 and the mother base 20 can be fixed together more tightly to prevent the sample holder 10 and the mother base 20 from losing contact in a low temperature and strong magnetic field environment.

[0027] Figure 3 The structure diagram schematically shows the mother seat and the sample holder in the pulled-out state according to the exemplary embodiment of the present disclosure. Figure 3 As shown in FIG. 1 , when the sample holder 10 and the female holder 20 are in the unplugged state, the two are out of electrical and thermal contact. Figure 3 In the unplugged state shown, the mother base 20 can be electrically and thermally connected to another sample holder in a pluggable manner. For example, the operator can insert another sample holder carrying a sample into the mother base 20 to continue measuring the thermal transport properties of another material sample, thereby improving the measurement efficiency. The sample holder 10 and the mother base 20 can be unplugged by the operator directly by hand or using an extractor.

[0028] The shielding cover 30 is used to ensure that the sample to be measured is placed in a vacuum environment for measurement, while shielding the environment from heat radiation to the sample to be measured. The shielding cover 30 and the base 20 need to be sealed, while ensuring that the vacuum can be maintained in a low temperature and strong magnetic field environment. The shielding cover 30 can be made of a material with high thermal conductivity, such as copper. In addition, the outer side of the shielding cover 30 can be plated with a first metal material to improve the reflection effect of external heat radiation.

[0029] Figure 4 The connection structure diagram of the shielding cover and the female base according to the exemplary embodiment of the present disclosure is schematically shown. Figure 4 As shown, in some exemplary embodiments, the female socket 20 may have a first flange structure 23, the shielding cover 30 may have a second flange structure 31, and the first flange structure 23 and the second flange structure 31 may be fixed to each other by a second fixing device (such as a screw 32).

[0030] In some exemplary embodiments, a small gap may be left between the first flange structure 23 and the second flange structure 31, and the second metal material may be filled in the gap. The second metal material may have good ductility, for example, may be metal indium, so that during the tightening process of the screw 32, the metal indium may fill the gap between the first flange structure 23 and the second flange structure 31.

[0031] Figure 5 Schematically shows another connection structure diagram of the shielding cover and the female base according to an exemplary embodiment of the present disclosure. Figure 5 As shown, in some exemplary embodiments, the female base 20 has a protruding structure 24, and the shielding cover 30 has a recessed structure 33. The structures of the protruding structure 24 and the recessed structure 33 correspond to each other, for example, the shapes of the two are complementary, so that the female base 20 and the shielding cover 30 can be fixed to each other by inserting the protruding structure 24 into the recessed structure 33.

[0032] In some exemplary embodiments, vacuum sealant may be filled between the protruding structure 24 and the recessed structure 33. When the shielding cover 30 is in a vacuum, the shielding cover 30 can continuously squeeze the female seat 20 under the action of atmospheric pressure, thereby achieving better vacuum sealing.

[0033] The heat transport measurement device according to the exemplary embodiment of the present disclosure can improve the efficiency of heat transport measurement of material samples in extreme environments, and can increase the scalability of the heat transport measurement device, and can expand a variety of sample holders for different material sample sizes and different measurement functions.

[0034] The basic principles of the present disclosure are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present disclosure are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present disclosure. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, and are not limitations. The above details do not limit the present disclosure to the necessity of adopting the above specific details to be implemented.

[0035] The block diagrams of the devices, apparatuses, equipment and systems involved in the present disclosure are only illustrative examples and are not intended to require or imply that they must be connected, arranged and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment and systems can be connected, arranged and configured in any manner. Each block shown in the figure can be subdivided into multiple sub-blocks, and each sub-block can implement related functions or steps, so that multiple sub-blocks can realize the functions realized by a large block before subdivision. Alternatively, the multiple blocks shown in the figure can also be merged into one block, which can realize the functions of multiple blocks before merging. In the present disclosure, words such as "including", "comprising", "having" and the like are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0036] It should be noted that in the apparatus, device and method of the present disclosure, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present disclosure.

[0037] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present disclosure. Therefore, the present disclosure is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0038] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present disclosure to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A device for heat transport measurement, comprising: a female base, used to be electrically and thermally connected to a sample holder in a pluggable manner, wherein the sample holder is electrically and thermally connected to a sample as a heat transport measurement object, and is used to carry the sample; and The shielding cover is airtightly connected to the mother seat and is used to seal the sample holder and the sample in a vacuum environment and shield the sample from heat radiation from the external environment.

2. The heat transport measuring device according to claim 1, wherein: The working environment of the heat transport measurement is a temperature range of 30mK to 350K and a magnetic field strength range of 0 to 25T.

3. The heat transport measurement device according to claim 1, wherein: The sample holder has a needle, and the female holder has a groove for receiving the needle. When the needle is inserted into the groove, the sample holder and the female holder are electrically connected through the needle and the groove. The supporting structure of the sample holder fits with the supporting structure of the female holder to achieve thermal connection.

4. The heat transport measurement device according to claim 3, wherein: When the needle is inserted into the groove, the sample holder and the female seat are fixed to each other by a first fixing device.

5. The heat transport measurement device according to claim 1, wherein: The outer side of the shielding cover is plated with a first metal material.

6. The heat transport measurement device according to any one of claims 1 to 5, wherein: The female base has a first flange structure, the shielding cover has a second flange structure, and the first flange structure and the second flange structure are fixed to each other via a second fixing device.

7. The heat transport measurement device according to claim 6, wherein: The gap between the first flange structure and the second flange structure is filled with a second metal material.

8. The heat transport measurement device according to any one of claims 1 to 5, wherein: The female base has a protruding structure, and the shielding cover has a concave structure. The female base and the shielding cover are fixed to each other by inserting the protruding structure into the concave structure.

9. The heat transport measurement device according to claim 8, wherein: A vacuum sealant is filled between the protruding structure and the recessed structure.

10. The heat transport measurement device according to any one of claims 1 to 5, wherein: When the female base and the sample holder are in a pulled-out state, the female base is used to be electrically and thermally connected to another sample holder in a pluggable manner.

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