Open-hole thickened metal foil heating body for neutron scattering experiment

Abstract

The utility model relates to the technical field of neutron scattering experiments, in particular to a perforated thickened metal foil heating body for a neutron scattering experiment. Comprising a first electrode plate, a second electrode plate, a niobium tube cover, a ceramic tube sleeve, niobium foil, a niobium ring and a ceramic cover, wherein the niobium tube cover is in the shape of a vertical sleeve, and a first electrode plate is welded to the top of the niobium tube cover; the second electrode plate is arranged on the periphery of the niobium tube cover in a sleeving manner, is positioned below the first electrode plate and is connected with the first electrode plate through a bolt; a ceramic tube sleeve is arranged between the first electrode plate and the second electrode plate; a niobium foil is welded on the inner surface of the niobium tube cover, and a niobium ring is welded at the bottom of the niobium foil; the bottom of the niobium ring is connected with a ceramic cover through a bolt; the heating body aims to provide an ultrahigh-temperature sample environment, and meets the urgent demand of neutron scattering experiments on high-performance heat source equipment by optimizing the structural design, lowering the experimental background, improving the heating efficiency and prolonging the service life.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of neutron scattering experiment, especially point to a kind of for the opening thickening metal foil heating body of neutron scattering experiment. BACKGROUND

[0002] In neutron scattering experiment, in order to simulate and observe the behavior of matter under high temperature environment, it is often necessary to provide sample environment up to 1200-1600 ℃. Metal foil heating body, especially niobium foil heating body, because of its high efficiency, stable heating performance, becomes the key heat source to realize superhigh temperature sample environment in neutron scattering experiment. However, the traditional metal foil heating body has some limitations in design, such as high experimental background, and after long time under high temperature (especially more than 1400 ℃) and frequent cycle (about 20 cycles), it is easy to break down, resulting in reduced heating efficiency and shortened service life.

[0003] Therefore, an improved metal foil heating body design is needed to reduce the experimental background, improve the heating efficiency and significantly prolong its service life under high temperature. The improvement should optimize the structure of the heating body to enhance its high temperature resistance, reduce the risk of damage, while ensuring that the neutron beam can flow smoothly, without affecting the accuracy and precision of scattering experiment. SUMMARY

[0004] In view of the above problems, the present application aims to provide an opening thickening metal foil heating body for neutron scattering experiment, which aims to provide a superhigh temperature sample environment, and by optimizing the structural design, reduce the experimental background, improve the heating efficiency and prolong the service life, to meet the urgent needs of neutron scattering experiment for high-performance heat source equipment.

[0005] The technical scheme adopted by the present application is: an opening thickening metal foil heating body for neutron scattering experiment, the opening thickening metal foil heating body comprises a first electrode sheet, a second electrode sheet, a niobium tube cover, a ceramic tube sleeve, a niobium foil, a niobium ring and a ceramic cover; wherein the niobium tube cover is a vertical sleeve, and the first electrode sheet is welded on the top of the niobium tube cover; the second electrode sheet is sleeved on the outer periphery of the niobium tube cover and below the first electrode sheet, and is connected with the first electrode sheet by bolts; the ceramic tube sleeve is arranged between the first electrode sheet and the second electrode sheet; the inner surface of the niobium tube cover is welded with the niobium foil, and the bottom of the niobium foil is welded with the niobium ring; the bottom of the niobium ring is connected with the ceramic cover and connected by bolts.

[0006] The material of the first electrode sheet and the second electrode sheet is copper, the first electrode sheet is welded on the top of the niobium tube cover, and the second electrode sheet is connected with the first electrode sheet by bolts and nuts.

[0007] The material of the niobium tube cover is niobium, and it has an inner and outer two-layer structure.

[0008] The niobium tube cover has a thickness of 1-2 mm, an inner diameter of the inner layer of 50-55 mm, and an outer diameter of the outer layer of 60-65 mm.

[0009] The niobium foil has an inner diameter of 50-55 mm, an outer diameter of 60-65 mm, and a base thickness of 0.05-0.1 mm.

[0010] The niobium foil has an inner diameter of 50-55 mm, an outer diameter of 60-65 mm, and a base thickness of 0.05-0.1 mm.

[0011] The niobium foil has a total height of 200-250 mm, a thickness of 0.1-0.2 mm in the portion with a height of 82.5-147.5 mm, and two key-shaped holes in the middle, each hole having a length of 58-68 mm and a width of 18-24 mm.

[0012] The niobium ring has a thickness of 5-10 mm, an inner diameter of 50-55 mm, and an outer diameter of 60-65 mm.

[0013] The niobium foil is welded to the side of the niobium ring, and the bottom of the niobium ring is provided with four threaded through holes for connecting the ceramic cover.

[0014] The ceramic cover is made of silicon carbide (SiC), and the bottom of the ceramic cover is provided with threaded through holes for connecting the niobium ring.

[0015] The perforated thickened metal foil heating body is optimized for the special requirements of neutron scattering experiments, bringing significant benefits:

[0016] Improving heating efficiency and temperature uniformity: by adopting a double-layer niobium foil design and thickening the key parts, the heating body of the utility model can more effectively utilize the current heat effect to generate a large amount of heat. This design not only improves the heating efficiency, but also ensures the uniform distribution of sample temperature, providing a stable and high-temperature sample environment for neutron scattering experiments.

[0017] Extending the service life: the thickening design of the niobium foil, especially in the thermal stress concentration area prone to damage, significantly enhances the structural strength of the heating body and reduces the risk of damage caused by high-temperature cyclic work. In addition, the use of the ceramic cover also further protects the heating body, reducing oxidation and wear, thereby greatly extending the service life of the heating body.

[0018] Reducing experimental background: the key-shaped hole design in the middle of the heating body provides a channel for the neutron beam, reducing the interaction between neutrons and the heating body material, thereby effectively reducing the background noise during the experiment. This improves the signal-to-noise ratio of the neutron scattering signal, making the experimental data more accurate and reliable.

[0019] Improve experimental flexibility and safety: the heating body structure of the utility model is compact, easy to install and replace, and improves the flexibility of the experiment. At the same time, the high-temperature-resistant, heat-insulating ceramic material and the optimized current path design ensure the safety during the experiment, and reduce the potential safety hazards.

[0020] Promote the development of neutron scattering technology: the open hole thickened metal foil heating body provides an efficient, stable and long-life heat source equipment for neutron scattering experiments, which helps to promote the research progress of neutron scattering technology in the fields of material science, physics, chemistry and other fields. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a whole structure schematic view of the present application;

[0022] Figure 2 It is a front view structure schematic view of the present application;

[0023] Figure 3 It is a cross section structure and current motion direction schematic view of the present application.

[0024] The figure caption explains: 1-electrode sheet, 2-electrode sheet, 3-niobium tube cover, 4-ceramic tube cover, 5-niobium foil, 6-niobium ring, 7-ceramic cover. DETAILED DESCRIPTION

[0025] The preferred embodiments of the utility model will be described in detail below in combination with the drawings, but the utility model is not limited to the following embodiments.

[0026] As Figures 1-3 , an open hole thickened metal foil heating body for neutron scattering experiment, its overall structure is shown in Figure 1 . The heating body is mainly composed of first electrode sheet 1, second electrode sheet 2, niobium tube cover 3, ceramic tube cover 4, niobium foil 5, niobium ring 6 and ceramic cover 7.

[0027] Specifically, the niobium tube cover 3 is a vertical sleeve, and the first electrode sheet 1 is welded at the top of the niobium tube cover 3. The second electrode sheet 2 is sleeved on the outer periphery of the niobium tube cover 3 and is located below the first electrode sheet 1, and is connected with the first electrode sheet 1 through M6 bolt and nut. The ceramic tube cover 4 is arranged between the first electrode sheet 1 and the second electrode sheet 2 to play the role of insulation and heat insulation.

[0028] The inner surface of the niobium tube cover 3 is welded with the niobium foil 5, and the bottom of the niobium foil 5 is welded with the niobium ring 6. The bottom of the niobium ring 6 is connected with the ceramic cover 7, and is connected through M3 bolt. The material of the ceramic cover 7 is silicon carbide SiC, which has good high-temperature-resistant characteristics and heat insulation capacity, can reduce the heat leakage of the heating body and the sample, and improve the efficiency of radiant heating.

[0029] The material of the first electrode sheet 1 and the second electrode sheet 2 is copper, so as to ensure good conductivity. The material of the niobium tube cover 3 is niobium, and the niobium tube cover 3 has an inner-outer structure, and the thickness is 1-2 mm, the inner diameter of the inner layer is 50-55 mm, and the inner diameter of the outer layer is 60-65 mm.

[0030] The material of the niobium foil 5 is also niobium, and the niobium foil 5 has an inner-outer structure. The total height of the niobium foil 5 is 200-250 mm, and the basic thickness is 0.03-0.1 mm. In the middle part of the niobium foil, the thickness of the niobium foil 5 is increased to 0.1-0.2 mm, so as to enhance the structural strength of the region and reduce thermal stress. In addition, the niobium foil 5 is provided with two key-shaped holes in the middle part, and the length of each hole is 58-68 mm, and the width is 18-24 mm, so as to pass the neutron beam and reduce the experimental background.

[0031] The material of the niobium ring 6 is also niobium, and the thickness is 5-10 mm, the inner diameter is 50-55 mm, and the outer diameter is 60-65 mm. The niobium foil 5 is welded on the side of the niobium ring 6, and the bottom of the niobium ring 6 is provided with four M3 threaded through holes, which are used for connecting the ceramic cover 7.

[0032] In actual work, the heating body is loaded into a neutron scattering high-temperature furnace, and a sample is hung on the central axis of the heating body through a sample rod, and the sample height is aligned with the height of the opening of the niobium foil 5. Before work, the high-temperature furnace needs to be sealed and treated, and vacuum is extracted to below 10^-9 Kpa or an inert gas atmosphere is added, so as to prevent the heating body from being oxidized and damaged at high temperature.

[0033] Then, the first electrode sheet 1 and the second electrode sheet 2 are connected with cables to provide high current. The current enters from the second electrode sheet 2, flows through the outer layer of the niobium tube cover 3, the outer layer of the niobium foil 5, the bottom niobium ring 6, and then flows from bottom to top through the inner layer of the niobium foil 5, the inner layer of the niobium tube cover 3, and finally flows out from the first electrode sheet 1. Due to the current heat effect, the electrons generate damping heat in the migration process, so that a large amount of heat is generated in the niobium foil 5, and the heat is transmitted to the sample in the form of heat radiation, so as to heat the sample.

[0034] The neutron beam passes through the neutron beam window of the high-temperature furnace and the opening of the niobium foil 5, and hits the sample to occur neutron scattering. The scattered neutrons directly pass through the heating body and the high-temperature furnace, and are collected by an external detector. Through processing and analysis of the detected energy and wave vector, such as signal correction, normalization and fitting, the microstructure and dynamic characteristics of the sample can be explained.

[0035] In summary, the opening thickening metal foil heating body has the advantages of high heating efficiency, long service life, low experimental background, and can meet the needs of neutron scattering experiments on ultra-high temperature sample environment equipment.

[0036] The utility model is not limited to the above specific implementation, for the technical personnel of the utility model belongs to technical field, according to the thought of the utility model, still can make several simple deduction, deformation or replacement. Without deviating from the spirit of the utility model or beyond the range defined by the attached claims, all are within the scope of the utility model claimed.

Claims

1. An open-cell thickened metal foil heat generator for neutron scattering experiments, characterized by: The open-hole thickened metal foil heating body comprises a first electrode sheet (1), a second electrode sheet (2), a niobium tube cover (3), a ceramic tube sleeve (4), a niobium foil (5), a niobium ring (6) and a ceramic cover (7); wherein the niobium tube cover (3) is a vertical sleeve, the first electrode sheet (1) is welded on the top of the niobium tube cover (3); the second electrode sheet (2) is sleeved on the outer periphery of the niobium tube cover (3) and is below the first electrode sheet (1), and is connected with the first electrode sheet (1) by bolts; the ceramic tube sleeve (4) is arranged between the first electrode sheet (1) and the second electrode sheet (2); the inner surface of the niobium tube cover (3) is welded with the niobium foil (5), and the bottom of the niobium foil (5) is welded with the niobium ring (6); the bottom of the niobium ring (6) is connected with the ceramic cover (7) and is connected by bolts.

2. The open-hole thickened metal foil heat generator for neutron scattering experiments according to claim 1, characterized in that: The material of the first electrode sheet (1) and the second electrode sheet (2) is copper, the first electrode sheet (1) is welded on the top of the niobium tube cover (3), and the second electrode sheet (2) is connected with the first electrode sheet (1) by bolts and nuts.

3. The open-hole thickened metal foil heat generator for neutron scattering experiments according to claim 1, characterized in that: The material of the niobium tube cover (3) is niobium, and the niobium tube cover (3) has an inner-outer two-layer structure.

4. The open-hole thickened metal foil heat generator for neutron scattering experiments according to claim 3, characterized in that: The thickness of the niobium tube cover (3) is 1-2mm, the inner diameter of the inner layer is 50-55mm, and the inner diameter of the outer layer is 60-65mm.

5. The open-hole thickened metal foil heat generator for neutron scattering experiments according to claim 1, characterized in that: The material of the niobium foil (5) is niobium, and the niobium foil (5) has an inner-outer two-layer structure, and two key-shaped holes are formed in the middle of the niobium foil (5).

6. The open-hole thickened metal foil heat generator for neutron scattering experiments according to claim 5, characterized in that: The inner diameter of the inner layer of the niobium foil (5) is 50-55mm, the inner diameter of the outer layer is 60-65mm, and the basic thickness is 0.05-0.1mm.

7. The open-hole thickened metal foil heat generator for neutron scattering experiments according to claim 5, characterized in that: The total height of the niobium foil (5) is 200-250mm, the thickness of the part with a height of 82.5mm-147.5mm is 0.1-0.2mm, and two key-shaped holes are formed in the middle of the niobium foil (5), each hole has a length of 58-68mm and a width of 18-24mm.

8. The open-hole thickened metal foil heat generator for neutron scattering experiments according to claim 1, characterized in that: The material of the niobium ring (6) is niobium, the thickness is 5-10mm, the inner diameter is 50-55mm, and the outer diameter is 60-65mm.

9. The open-hole thickened metal foil heat generator for neutron scattering experiments according to claim 5, characterized in that: The niobium foil (5) is welded on the side of the niobium ring (6), four threaded through holes are formed in the bottom of the niobium ring (6) for connecting the ceramic cover (7).

10. The open-cell thickened metal foil heat generator for neutron scattering experiments according to claim 1, characterized in that: The material of the ceramic cover (7) is silicon carbide, and threaded through holes are formed in the bottom of the ceramic cover (7) for connecting the niobium ring (6).

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