Powder sample preparation mold of photoelectron spectrometer

Abstract

The invention discloses a powder sample preparation mold of a photoelectron spectrometer. The powder sample preparation mold comprises a sample groove and a base, the sample groove is made of a compressible material, has compressibility and is used for synchronously compressing and compacting the sample groove together with a sample; the base is a perforated plate with a plurality of holes, the holes are matched with the sample grooves in an embedded mode, the sample grooves are higher than the holes before compression, and the sample grooves are flush with the holes after compression. The sample preparation mold can be used for pressing powder samples in batches, the powder sample preparation process of the photoelectron spectrometer is simplified, the sample preparation time is shortened, the convenience of powder sample preparation can be effectively improved, sample pollution is avoided, and the sample preparation efficiency is greatly improved. Compared with a traditional mode of preparing a sample by using an adhesive tape, the sample preparation mold disclosed by the invention can be used for preventing glue on the adhesive tape from immersing into a powder sample to cause pollution, the sample can be recycled after a test is completed, the prepared sample does not need to be cut, powder cannot be generated to pollute a sample chamber, the exposed surface of the sample is relatively large and relatively flat, and the detection signal intensity is favorably improved.

Description

Technical Field

[0001] The invention belongs to the technical field of sample preparation molds, and in particular relates to a powder sample preparation mold for a photoelectron spectrometer, and specifically relates to a powder sample preparation mold for an X-ray photoelectron spectrometer. Background Art

[0002] X-ray photoelectron spectrometer is a semi-quantitative analysis and detection device that uses the characteristic electron binding energy of the photoelectric effect to analyze the type, content, valence and chemical bond of elements within 10nm of the material surface. It is used to analyze solid block and powder samples, and the number of powder samples accounts for a relatively high proportion. In order to improve the signal strength, the sample needs to have a flat test surface. Therefore, when preparing the sample, the powder sample is usually sprinkled on the tape for stamping, and then cut to a suitable size and pasted on the sample table. However, this process is time-consuming and cumbersome, and the bottom tape may immerse the sample and cause contamination. At present, some molds have been developed to improve the efficiency of powder sample preparation. However, these molds have complex structures. In order to compact specific sites, it is usually necessary to design concave and convex structures, and it is difficult to prepare and compact batch samples. In particular, when preparing batch samples, it is difficult to ensure that all samples are compacted when the compaction density of the samples is inconsistent. In addition, it is difficult to clean, and there is a risk of cross contamination when reused, which affects the practicality of the mold. Furthermore, these molds have a large demand for samples, and it is difficult to recycle the samples after testing, resulting in sample waste. There is no sample-making mold that can effectively realize batch pressing of powder samples in the prior art, and there is no report on a sample-making mold that can batch press samples of different compaction densities. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a powder sample preparation mold for a photoelectron spectrometer which is convenient for batch sample preparation and has good sample preparation effect in view of the deficiencies in the prior art.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A powder sample preparation mold for a photoelectron spectrometer comprises a sample slot and a base; the sample slot is made of a compressible material and has compressibility; the base is a porous plate with a plurality of holes, the holes are nested with the sample slot, the sample slot is higher than the holes before compression, and the sample slot is flush with the holes after compression.

[0006] The powder sample preparation mold for the photoelectron spectrometer is further improved in that the sample slot includes a groove and a support portion located below the groove, and both the groove and the support portion are compressible.

[0007] The powder sample preparation mold for the photoelectron spectrometer is further improved in that the diameter of the sample groove gradually decreases from both ends to the middle.

[0008] The powder sample preparation mold for the photoelectron spectrometer is further improved in that the groove is a tapered groove that is larger at the top and smaller at the bottom, and the depth of the tapered groove is less than or equal to half the height of the sample groove.

[0009] The powder sample preparation mold for the photoelectron spectrometer is further improved in that the sample slot is made of a polymer material, and the polymer material is one or more of PVC, PE, PP and rubber.

[0010] The powder sample preparation mold for the above-mentioned photoelectron spectrometer is further improved, wherein the holes include concentrically stacked upper holes and lower holes, the diameter of the upper holes is larger than the diameter of the lower holes, and the upper holes are nested with the sample slots.

[0011] The powder sample preparation mold of the above-mentioned photoelectron spectrometer is further improved and also includes a separation frame, which includes a base plate, and a plurality of columns are vertically arranged on the base plate. The positions of the columns correspond to the positions of the holes on the base, and the diameter of the columns is less than or equal to the diameter of the lower layer holes.

[0012] The above-mentioned powder sample preparation mold for the photoelectron spectrometer is further improved, and the separation frame also includes a top cover, and a plurality of support beams are arranged on the top cover at intervals, the height of the support beams is greater than or equal to the height of the upper holes, the width of the support beams is less than or equal to the spacing between the outer peripheries of two adjacent holes, and the length of the support beams is greater than or equal to the length of the base.

[0013] The above-mentioned powder sample preparation mold for the photoelectron spectrometer is further improved, wherein the material of the base is one or more of aluminum, copper and aluminum-copper alloy; the material of the bottom plate is one or more of aluminum, copper, iron and their alloys, and stainless steel; the material of the top cover is one or more of aluminum, copper, iron and their alloys, and stainless steel.

[0014] The powder sample preparation mold for the photoelectron spectrometer described above is further improved in that the sample slot, base and separation frame are integrally formed by mold processing or made by 3D printing.

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] (1) The powder sample preparation mold of the photoelectron spectrometer of the present invention integrates and fixes multiple sample slots through a base with multiple holes, which is convenient for batch pressing of samples. Since the sample slots are compressible, they can be compressed and compacted synchronously with the increase of sample preparation pressure. The sample slots will not break when subjected to vertical and uniform downward pressure, and the open end of the slot body will not be skewed. It will only be compressed and shortened in height and become thicker in the radial direction. When preparing the sample, the sample slots are pressed to be completely embedded in the holes to ensure that the sample is compacted. Due to the limitation of the holes, the sample slots can be prevented from being overly flattened and causing the sample to be too dispersed. The sample is fully compacted in a limited space, which can better guarantee the sample preparation effect. In addition, the sample slots of the present invention are very small in size, only a few millimeters, with less consumables. They are designed as disposable molds, which can avoid tedious cleaning work and thus avoid cross contamination caused by unclean cleaning; and the overall design of integrating multiple sample slots through the bottom plate can avoid the problem that a single sample slot is too small and easy to be scattered, and it is time-consuming and labor-intensive to arrange and arrange scattered sample slots, which is not conducive to improving the efficiency of sample preparation. The sample preparation mold of the present invention can be used to press powder samples in batches, which can effectively improve the convenience of powder sample preparation, avoid sample contamination, and greatly improve sample preparation efficiency. Compared with the traditional method of using tape to prepare samples, the sample preparation mold of the present invention can avoid the contamination of the powder sample by the glue on the tape, and the sample can be recycled again after the test is completed. The prepared sample does not need to be cut, and powder will not contaminate the sample chamber. The sample exposure surface is larger and flatter, which helps to improve the detection signal strength.

[0017] (2) The present invention designs the sample groove into a groove and a support portion, and makes the groove and the support portion compressible. The groove is used to accommodate the sample, and the support portion is used to support the groove and play a buffering role during compression. During the sample preparation and pressing process, if the powder sample is loose, the sample and the groove are compressed and compacted first, and then the height of the support portion is compressed, and the sample groove becomes thicker radially until it is limited by the holes of the base; if the powder sample is dense, the height of the support portion is compressed first, and the sample groove becomes thicker radially until it is limited by the holes of the base, and then the sample and the groove are compressed and compacted. In this way, powder samples of different densities can be compacted at the same time, and batch compression and compaction of samples of different densities can be achieved. The mold of the present invention can not only prepare samples in batches, but also press powder samples of different densities at the same time, simplifying the time-consuming and cumbersome operation of the sample preparation process of the powder sample, without the need for cutting and cleaning, greatly shortening the sample preparation time, saving manpower, and avoiding contamination between samples and penetration contamination of the tape to the sample, thereby improving the accuracy of the sample test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the sample slot in the sample preparation mold according to a specific embodiment of the present invention.

[0019] Figure 2 It is a schematic structural diagram of the bottom plate in the sample making mold according to a specific embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the principle of the sample preparation mold of a specific embodiment of the present invention for simultaneously pressing powder samples of different densities.

[0021] Figure 4 It is a schematic structural diagram of a separation frame in a sample preparation mold according to a specific embodiment of the present invention.

[0022] Figure 5 It is a schematic diagram of separating the sample slots after the sample preparation and testing of the sample preparation mold in a specific embodiment of the present invention is completed.

[0023] Figure 6 This is a physical picture of the sample preparation mold of a specific embodiment of the present invention simultaneously pressing powder samples of different densities.

[0024] Figure 7 This is a physical comparison diagram of the sample preparation mold of a specific embodiment of the present invention simultaneously pressing powder samples of different densities and the traditional method of sample preparation.

[0025] Figure 8 This is an actual enlarged comparison diagram of the sample preparation mold of a specific embodiment of the present invention simultaneously pressing powder samples of different densities and the sample preparation method of the traditional method.

[0026] Fig. 9 This is an XPS comparison chart of the sample preparation mold of a specific embodiment of the present invention simultaneously pressing powder samples of different densities and the sample preparation method of the traditional method, wherein Figure (a) is graphite, Figure (b) is slag, and Figure (c) is magnesium oxide.

[0027] Legend: 1. Sample slot; 11. Groove; 12. Support part; 2. Base; 21. Hole; 211. Upper hole; 212. Lower hole; 3. Separation rack; 31. Bottom plate; 311. Column; 32. Top cover; 321. Support beam. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings and specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0029] Figure 1 and Figure 2 The present invention shows a powder sample preparation mold for a photoelectron spectrometer, comprising a sample slot 1 and a base 2; the sample slot 1 is made of a compressible material and has compressibility, so as to achieve synchronous compression and compaction of the sample slot 1 and the sample; the base 2 is a porous plate with a plurality of holes 21, the holes 21 are nested with the sample slot 1, the sample slot 1 is higher than the holes 21 before compression, and is flush with the holes 21 after compression.

[0030] In this embodiment, the sample slot 1 in the sample preparation mold is made into a compressible slot body by using a density compressible material such as a polymer material, and then the base 2 is designed as a porous plate, so that the sample slot 1 can be nested and fixed in the hole 21 on the porous plate, and the sample slot 1 is higher than the hole 21 before sample preparation compression, and is flush with the hole 21 after sample preparation compression. The sample preparation mold of this embodiment integrates and fixes multiple sample slots 1 through the base 2 with multiple holes 21, which is convenient for batch compression of samples. Since the sample slot 1 is compressible, it can be compressed and compacted synchronously with the increase of sample preparation pressure. The sample slot 1 will not break when subjected to vertical and uniform downward pressure, and the open end of the slot body will not be skewed. It will only be compressed and shortened in height and become thicker in the radial direction. When preparing the sample, the sample slot 1 is pressed to be completely embedded in the hole 21 to ensure that the sample is compacted. Due to the limitation of the hole 21, it can be avoided that the sample slot 1 is overly flattened to cause the sample to be too dispersed, and the sample is fully compacted in a limited space, which can better guarantee the sample preparation effect. In addition, the sample slot 1 of this embodiment is very small, only a few millimeters, with less consumables, and is designed as a disposable mold, which can avoid tedious cleaning work and thus avoid cross contamination caused by unclean cleaning; and the overall design of integrating multiple sample slots 1 through the bottom plate 31 can avoid the problem that a single sample slot 1 is too small and easy to be scattered, and it is time-consuming and laborious to arrange and arrange scattered sample slots 1, which is not conducive to improving sample preparation efficiency. The sample preparation mold of this embodiment can press powder samples in batches, effectively improve the convenience of powder sample preparation, avoid sample contamination, and greatly improve sample preparation efficiency.

[0031] The sample preparation process of the powder sample preparation mold of the photoelectron spectrometer of this embodiment is as follows: first take a sample slot 1, take a small amount of powder sample to fill the groove 11 at the top of the sample slot 1, place the sample slot 1 filled with samples in the hole 21 of the base 2, and repeat the above steps to complete the filling and placement of all samples. To ensure uniform force, the sample slots 1 should be distributed as evenly and symmetrically as possible on the base 2. Move the placed base 2 to the tablet press, press the sample slots 1 with the tablet press, and stop pressing when all the sample slots 1 are completely pressed into the hole 21 of the base 2, and complete the batch preparation of powder samples.

[0032] In this embodiment, the sample slot 1 includes a groove 11 and a support portion 12 located below the groove 11. Both the groove 11 and the support portion 12 are compressible. The groove 11 is used to accommodate the sample, and the support portion 12 is used to support the groove 11 and play a buffering role during compression. This design allows powder samples of different densities to be compacted at the same time, thereby achieving batch compression and compaction of samples of different densities.

[0033] like Figure 3As shown, during the sample preparation and pressing process, if the powder sample is loose, the sample and the groove 11 at the top of the sample slot 1 are compressed and compacted first, and then the height of the sample slot 1, especially the support portion 12, is compressed, and the sample slot 1 becomes radially thicker until it is limited by the hole 21 of the base 2; if the powder sample is dense, the height of the sample slot 1, especially the support portion 12, is compressed first, and the sample slot 1 becomes radially thicker until it is limited by the hole 21 of the base 2, and then the sample and the groove 11 at the top of the sample slot 1 are compressed and compacted. The pressure applied by the press on the sample slot 1 is uniform and vertically downward. When the sample slot 1 is subjected to the vertical uniform downward pressure, the height is compressed and the diameter is slightly enlarged. In addition, since the radial deformation is limited by the diameter of the hole 21 of the base 2, it will not be further enlarged. At this time, the sample and the sample slot 1 are compressed and compacted by great pressure, thereby obtaining a flat surface. Figure 3 In the figure, compared with the hard sample on the left (such as magnesium oxide), the soft sample on the right (such as graphite) has a smaller final thickness after pressing and the exposed surface is relatively reduced.

[0034] In this embodiment, the diameter of the sample slot 1 gradually decreases from both ends to the middle, so that the overall structure is thick at both ends and thin in the middle, that is, the middle of the outer side of the sample slot 1 is concave inward, so as to achieve the compressibility of the structure of the sample slot 1, thereby alleviating the radial deformation of the sample slot 1. The sample slot 1 of this embodiment has both structural compressibility and density compressibility, and can be better compressed and deformed according to predetermined conditions, reducing the probability of adverse deformation of the sample slot 1, which is conducive to ensuring a better sample preparation and compaction effect.

[0035] In this embodiment, the groove 11 is a tapered groove that is larger at the top and smaller at the bottom. The depth of the tapered groove is less than or equal to half the height of the sample groove 1. Assuming the height of the sample groove 1 is H and the depth of the tapered groove 11 is h, then h≤1 / 2H. The tapered groove is specifically in the shape of a truncated cone and is used to fill the sample. The large opening at the top helps to quickly add the sample and increase the sample test surface, and the narrow bottom helps to reduce the amount of sample added. By adjusting the height of the sample groove 1 and the depth of the groove 11, the surface flatness and compaction density of the final sample can be improved, and the amount of sample added can be saved.

[0036] In this embodiment, the hole 21 includes an upper hole 211 and a lower hole 212 stacked concentrically, the diameter of the upper hole 211 is larger than the diameter of the lower hole 212, and the upper hole 211 is nested with the sample slot 1. The purpose of designing the hole 21 as a double-layer hole is that the upper hole 211 is mainly used to place the sample slot 1 before sample preparation and to limit the sample slot 1 radially during the sample preparation process, and the lower hole 212 is used to support the sample slot 1 to ensure that the sample slot 1 will not leak from the bottom of the hole 21. After the test is completed, the sample slot 1 can be pushed out of the upper hole 211 from the bottom of the lower hole 212, which is convenient for cleaning the base 2 and sample recovery.

[0037] like Figure 4As shown, in this embodiment, the powder sample preparation mold of the photoelectron spectrometer also includes a separation rack 3, which includes a bottom plate 31, on which a plurality of columns 311 are vertically arranged, and the positions of the columns 311 correspond to the positions of the holes 21 on the base 2, and the diameter of the columns 311 is less than or equal to the diameter of the lower hole 212. The bottom plate 31 with a plurality of columns 311 is used to separate the sample slot 1 and the base 2 after testing. When in use, the bottom plate 31 is placed under the base 2, so that the columns 311 are aligned with the center of the lower hole 212, and force is applied to push the columns 311 out of the sample slot 1 from the bottom of the lower hole 212.

[0038] In this embodiment, the separation frame 3 further includes a top cover 32, on which a plurality of support beams 321 are arranged at intervals, the height of the support beams 321 is greater than or equal to the height of the upper hole 211, the width of the support beams 321 is less than or equal to the distance between the outer peripheries of two adjacent holes 21, and the length of the support beams 321 is greater than or equal to the length of the base 2. Specifically, as Figure 5 As shown, the support beams 321 of this embodiment are rectangular parallelepiped, with a total of three beams, which are respectively located at the edges and the middle of the top cover 32 on both sides. After the test is completed, the bottom plate 31 is placed under the base 2, and the top cover 32 is placed above the base 2. Pressure is applied to the base 2 through the top cover 32, so that the column 311 on the bottom plate 31 can smoothly push the sample slot 1 out of the upper hole 211. The top cover 32 cooperates with the bottom plate 31 to make it easy to separate the sample slot 1 from the bottom plate 31. More importantly, the top cover 32 applies force to prevent hands from contacting the sample, and can also play a dust-proof role. Pushing the sample from the bottom up can avoid cross contamination between different samples. In short, the top cover 32 not only helps to separate the sample slot 1 from the base 2, but also can protect the sample from contamination in all directions during the separation process, so as to achieve clean recovery.

[0039] In this embodiment, the sample slot 1 and the separation rack 3 are respectively made by 3D printing, and the base 2 is made by machining an aluminum plate. Of course, in other embodiments, they can also be integrally formed by mold processing.

[0040] Since the mold size is very small, the longitudinal and transverse dimensions of the sample slot 1 are generally no more than 10mm, and the pressure used when the sample is pressed is often above 10MPa (equivalent to 98.7 atmospheres, or 102 kilograms of pressure), so the material selection range for the sample slot 1 is relatively large, and the solution of this embodiment can be realized as long as it has a certain compressibility. For example, the material of the sample slot 1 can be a polymer material with compression elasticity such as PVC plastic, PP plastic, PE plastic or rubber. In addition, the X-ray photoelectron spectrometer is sensitive to magnetic materials, and the sample slot 1 and the base 2 should avoid using magnetic materials. The material of the base 2 can be aluminum, copper, aluminum-copper alloy or other non-magnetic materials with high strength, such as high-strength glass, high-strength plastic, etc. The separation frame 3 does not need to be considered too much, and can use materials that are easy to process and have high strength, such as aluminum, copper, iron and their alloys, or stainless steel, etc. The researchers of the present invention further explored the mold material with better sample preparation effect. Specifically, the sample slot 1 is made of PVC plastic, the base 2 is made of aluminum, and the separation frame 3 is made of stainless steel.

[0041] Furthermore, the researchers of the present invention further explored the mold size with better sample preparation effect. Specifically, the diameter of the sample slot 1 is 8mm and the height is 5mm. The diameter of the open end of the top groove 11 is 5mm, the bottom diameter is 2mm, and the maximum cutting depth of the side of the sample slot 1 is 1mm. The length and width of the base 2 are both 60mm and the height is 5mm. The diameter of the upper hole 211 is 8mm and the height is 3.5mm. The diameter of the lower hole 212 is 3mm and the height is 1.5mm. The center distance between two adjacent holes 21 is 10mm. The length and width of the bottom plate 31 are both 60mm and the height is 2mm. The column 311 is a cylinder with a height of 5mm and a diameter of 3mm. The length and width of the top cover 32 are both 60mm and the height is 2mm. The support beam 321 is 60mm long, 1mm wide and 5mm high.

[0042] In order to verify the batch sample preparation effect of the powder sample preparation mold of the photoelectron spectrometer of this embodiment, especially the effect of batch pressing samples of different densities, the following test was conducted:

[0043] Select soft material graphite, hard material magnesium oxide and medium hardness material slag, and use the sample making mold of this embodiment and the traditional method to make samples respectively, such as Figure 6 , Figure 7 , Figure 8 As shown, Figure 6 This is a physical picture of the sample preparation mold of this embodiment simultaneously pressing powder samples of different densities. Figure 7 This is a comparison diagram of the sample preparation mold of this embodiment simultaneously pressing powder samples of different densities and the sample preparation method of the traditional method. Figure 8 This is an enlarged comparison of the actual object of the sample preparation mold of this embodiment pressing powder samples of different densities at the same time and the sample preparation method of the traditional method. Figure 8It can be clearly seen that, whether it is a soft material, a medium hardness material, or a hard material, the surface flatness of the samples pressed simultaneously using the mold of this embodiment is better than that pressed by the traditional method, and for the soft material graphite, the samples made by the traditional method have obvious cracks, which may cause sample preparation abnormalities.

[0044] X-ray photoelectron spectroscopy analysis was performed on the graphite, slag and magnesium oxide samples pressed simultaneously by the sample preparation mold of this embodiment and the graphite, slag and magnesium oxide samples pressed by the traditional method. The results are as follows: Fig. 9 As shown, Fig. 9 (a) in the graphite is graphite, Fig. 9 (b) is slag, Fig. 9 (c) in the formula is magnesium oxide. Fig. 9 It can be seen from the XPS spectrum that for powder samples of different densities, the test results of the samples batch pressed by the mold of this embodiment are consistent with those of the samples made by the traditional method, and from the detection signal intensity, for soft and hard materials, the samples prepared by the mold of this embodiment are slightly better than the traditional sample preparation method.

[0045] The following is an analysis and comparison of the traditional sample making method, the sample making method of the existing conventional mold and the sample making method of the sample making mold of this embodiment from different perspectives, as shown in Table 1:

[0046] Table 1 - Comparative analysis of traditional method sample preparation, existing mold sample preparation, and mold sample preparation of this embodiment

[0047]

[0048] As can be seen from the above table, the sample preparation using the mold of this embodiment greatly shortens the sample preparation time, which is only 1 / 8 of the traditional method. More importantly, the mold of this embodiment can be used for batch sample preparation, and even batch pressing of powder samples of different densities. The sample surface prepared by the mold sample preparation of this embodiment is smoother, the XPS detection signal is equivalent to the sample preparation by the traditional method, the test strength of soft and hard materials is even better, and there is no pollution. After the test is completed, the sample can be separated from the base in batches through the separation frame, which is convenient for recovery, and the sample recovery rate is >90%. The mold structure is simple and easy to use.

[0049] Although the present invention is disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any technician familiar with the art can use the above disclosed methods and technical contents to make many possible changes and modifications to the technical solutions of the present invention without departing from the spirit and technical solutions of the present invention, or modify them into equivalent embodiments of equivalent changes. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solutions of the present invention still fall within the scope of protection of the technical solutions of the present invention.

Claims

1. A powder sample preparation mold for a photoelectron spectrometer, characterized in that: The invention comprises a sample slot (1) and a base (2); the sample slot (1) is made of a compressible material and has compressibility; the base (2) is a porous plate having a plurality of holes (21), the holes (21) and the sample slot (1) are nested and matched; before compression, the sample slot (1) is higher than the holes (21), and after compression, the sample slot (1) and the holes (21) are flush.

2. The powder sample preparation mold for photoelectron spectrometer according to claim 1, characterized in that: The sample slot (1) comprises a groove (11) and a support portion (12) located below the groove (11); the groove (11) and the support portion (12) are both compressible.

3. The powder sample preparation mold for photoelectron spectrometer according to claim 2, characterized in that: The diameter of the sample tank (1) gradually decreases from both ends to the middle.

4. The powder sample preparation mold for photoelectron spectrometer according to claim 2, characterized in that: The groove (11) is a tapered groove that is larger at the top and smaller at the bottom, and the depth of the tapered groove is less than or equal to half the height of the sample groove (1).

5. The powder sample preparation mold for photoelectron spectrometer according to any one of claims 1 to 4, characterized in that: The sample tank (1) is made of a polymer material, and the polymer material is one or more of PVC, PE, PP and rubber.

6. The powder sample preparation mold for photoelectron spectrometer according to claim 1, characterized in that: The hole (21) comprises an upper hole (211) and a lower hole (212) stacked concentrically, the diameter of the upper hole (211) is larger than the diameter of the lower hole (212), and the upper hole (211) is nested with the sample slot (1).

7. The powder sample preparation mold for photoelectron spectrometer according to claim 1, characterized in that: The separation rack (3) also includes a separation rack (3), the separation rack (3) including a bottom plate (31), a plurality of columns (311) vertically arranged on the bottom plate (31), the positions of the columns (311) corresponding to the positions of the holes (21) on the base (2), and the diameter of the columns (311) being less than or equal to the diameter of the lower layer holes (212).

8. The powder sample preparation mold for photoelectron spectrometer according to claim 7, characterized in that: The separation frame (3) further comprises a top cover (32), on which a plurality of support beams (321) are arranged at intervals, the height of the support beams (321) being greater than or equal to the height of the upper hole (211), the width of the support beams (321) being less than or equal to the spacing between the peripheries of two adjacent holes (21), and the length of the support beams (321) being greater than or equal to the length of the base (2).

9. The powder sample preparation mold for photoelectron spectrometer according to claim 8, characterized in that: The base (2) is made of one or more of aluminum, copper and aluminum-copper alloy; the bottom plate (31) is made of one or more of aluminum, copper, iron and alloys thereof, and stainless steel; the top cover (32) is made of one or more of aluminum, copper, iron and alloys thereof, and stainless steel.

10. The powder sample preparation mold for photoelectron spectrometer according to any one of claims 7 to 9, characterized in that: The sample tank (1), the base (2) and the separation frame (3) are respectively integrally formed by mold processing or manufactured by 3D printing.

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