Electron microscope sample table for soil in-situ observation
By designing an electron microscope sample stage for in-situ observation of soil, and using the edge support of the holding tank and the auxiliary positioning of positioning marks, the problem of easy collapse of soil particles during the freezing and thawing process was solved, and in-situ observation of soil before and after freezing and thawing was achieved. Scanning electron microscopy.
Patent Information
- Application Number
- CN202421187635.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-05-28
AI Technical Summary
Soil particles are prone to collapse during freeze-thawing, making it difficult to maintain in situ on the scanning electron microscope sample stage, limiting the in-situ scanning electron microscope observation before and after freeze-thawing of soil.
A type of electron microscopic sample table contains the capacity groove for loading samples and fixing parts for connecting the loading table. The edge of the capacity groove provides support, and the positioning logo assistance quickly positions soil samples in the micro -field.
It effectively avoids the massive collapse of soil particles, ensures the structural integrity of soil samples during the freezing and thawing process, and improves the timeliness and accuracy of in-situ scanning observations.
Smart Images
Figure CN222380545U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of soil sample atlas collection, in particular to an electron microscope sample stage used for in-situ soil observation. Background Art
[0002] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.
[0003] Soil freeze-thaw is common in northern my country. The freeze-thaw process will cause repeated changes in soil water and heat conditions, which will affect the physical, chemical and biological properties of soil and other environmental media. The alternating contraction and expansion produced by the freeze-thaw process can change the soil structure, morphology, and water distribution characteristics, especially reducing the stability of soil aggregates. Studying the structural changes of frozen-thawed soils in different regions in the laboratory is of great significance for agricultural production, effective utilization of soil resources, and ecological climate.
[0004] The observation of soil morphology during the freeze-thaw process requires scanning observation using a scanning electron microscope. However, the freeze-thaw cycle will cause the collapse of soil particles, which makes it difficult to keep the soil sample on the scanning electron microscope sample stage. Even if it is maintained, it is difficult to keep it in the original position, which makes it very difficult to use a scanning electron microscope to perform in-situ scanning observation of soil samples. After the soil particles collapse and the morphology changes significantly, it is difficult to find the original observation position. Therefore, it is impossible to achieve in-situ scanning electron microscope observation of soil samples before and after freeze-thaw, which limits the research progress of freeze-thaw soil.
[0005] Therefore, there is an urgent need for a structure that can keep soil samples intact before and after the experiment, so as to realize in-situ scanning observation of the soil before and after freezing and thawing. Utility Model Content
[0006] The purpose of the utility model is to provide an electron microscope sample stage for in-situ observation of soil in view of the difficulty in in-situ scanning electron microscope observation before and after soil freezing and thawing, which can maintain the structure of soil particles before and after freezing and thawing, avoid the situation where the position cannot be confirmed due to the large collapse of soil particles, and at the same time assist in confirming the original observation position, thereby assisting in in-situ scanning observation of soil.
[0007] The technical solution of the utility model is as follows:
[0008] An electron microscope sample stage for in-situ observation of soil, wherein the sample stage is mounted on a stage of an electron microscope.
[0009] The sample stage comprises a receiving groove for loading the sample and a fixing member for connecting the stage, wherein the fixing member is connected to the receiving groove;
[0010] The receiving groove has an opening, and the sample stage is provided with a positioning mark on a side surface of the opening, and the positioning mark is connected to the receiving groove;
[0011] The conductor coefficient of the fixing part and the receiving groove is greater than 35×10 6 The soil sample is placed in the holding tank, and the soil sample at the edge of the holding tank provides support to prevent the soil particles from collapsing significantly. At the same time, based on the setting of the positioning mark, the technicians can quickly locate the soil sample under the microscopic field of view, thereby reducing the soil positioning time, improving the accuracy of in-situ observation, and ensuring the timeliness of the observation.
[0012] According to a preferred embodiment, the connection position of the positioning mark is arranged so that the positioning mark and the sample in the receiving groove can be seen simultaneously in the microscopic field of view.
[0013] According to a preferred embodiment, the positioning mark is configured to be detachably connected to the receiving groove, and the positioning mark is, for example, a detachable marking ring.
[0014] According to a preferred embodiment, the positioning mark is configured to be fixedly connected to the receiving groove.
[0015] According to a preferred embodiment, the positioning mark is set as an angle mark with the center of the receiving groove as the center of the circle. For example, the angle mark is an angle scale with 60 equal divisions and numbers marked every 5 scales to assist in soil sample positioning.
[0016] According to a preferred embodiment, the positioning mark can also be a coordinate mark, a shape mark, or the like that can assist in determining the position of the sample.
[0017] According to a preferred embodiment, the shape of the receiving groove is set to be hemispherical or cylindrical.
[0018] According to a preferred embodiment, the volume of the receiving tank is at least 3.14 cm 3 , in order to accommodate enough soil samples for observation.
[0019] According to a preferred embodiment, the fixing member is, for example, a leg nail, which is inserted into the stage to achieve connection between the sample stage and the stage. The fixing member can also be set as other connecting members to adapt to the connection mode of the stage.
[0020] According to a preferred embodiment, the ratio of the depth to the width of the receiving groove is in the range of 1:2-1:4, so as to be more conducive to the observation of the soil structure.
[0021] Compared with the existing technology, the beneficial effects of the utility model are:
[0022] 1. An electron microscope sample stage for in-situ observation of soil, wherein a holding groove is provided to hold the soil sample in the holding groove, and when the soil structure changes during repeated freezing and thawing, the edge and bottom of the holding groove can provide support for the soil sample, thereby preventing the problem of large-scale collapse of soil particles and inability to confirm the in-situ state, which is beneficial to improving the timeliness of in-situ observation of soil and avoiding damage to the electron microscope caused by repeated vacuuming;
[0023] 2. An electron microscope sample stage for in-situ observation of soil, which can assist in locating soil samples under the microscopic field of view by setting positioning marks, thereby facilitating rapid confirmation of the area to be observed before and after soil freezing and thawing, thereby improving timeliness and accuracy of observation;
[0024] 3. An electron microscope sample stage for in-situ observation of soil, wherein the fixing parts can quickly fix the sample stage and improve scanning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 A left view of an electron microscope sample stage for in-situ observation of soil provided in Example 1 of the present application;
[0026] Figure 2 A top view of an electron microscope sample stage for in-situ observation of soil provided in Example 1 of the present application;
[0027] Figure 3 Another top view of an electron microscope sample stage for in-situ observation of soil provided in Example 1 of the present application.
[0028] Figure numerals: 1-accommodating groove, 2-fixing piece, 3-positioning mark. DETAILED DESCRIPTION
[0029] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0030] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.
[0031] Example 1
[0032] like Figure 1 As shown, this embodiment provides an electron microscope sample stage for in-situ observation of soil, the sample stage is installed on the stage of the electron microscope, and the sample stage includes a receiving tank 1 for loading samples. In the experiment, the soil sample can be placed in the receiving tank 1, and then repeated freeze-thaw tests are carried out. A fixing part 2 for connecting to the stage of the electron microscope is also provided, and the fixing part 2 is connected to the receiving tank 1 and electrically connected to the receiving tank 1. The receiving tank 1 has an opening, and the sample stage is provided with a positioning mark 3 on one side of the opening, and the positioning mark 3 is connected to the receiving tank 1 so that the soil in the receiving tank 1 can be quickly positioned by the positioning mark 3; the fixing part 2 and the receiving tank 1 adopt a conductor coefficient greater than 35×10 6 The material of the receiving groove 1 is S / m, so as to obtain a clear microscopic image of the sample. The edge of the receiving groove 1 can provide support for the soil sample, thereby preventing the soil particles from collapsing drastically, improving the accuracy of the structural observation of the soil before and after freezing and thawing, and facilitating the positioning of the soil before and after. Combined with the positioning mark 3, the technician can quickly locate the soil sample to be observed under the microscopic field of view, assist in the in-situ observation of the soil, improve the detection efficiency, and ensure the timeliness of the observation.
[0033] Preferably, the fixing member 2 and the receiving groove 1 are made of conductive metals such as iron, copper or aluminum.
[0034] According to a preferred embodiment, the connection position of the positioning mark 3 is set so that the positioning mark 3 and the sample in the receiving groove 1 can be seen simultaneously in the microscopic field of view.
[0035] According to a preferred embodiment, the positioning mark 3 is configured to be fixedly connected to the receiving groove 1. Figure 2 As shown, the positioning mark 3 is set as an angle mark with the center of the receiving groove 1 as the center of the circle. The angle mark is, for example, an angle scale, which adopts 60 equal divisions, and every 5 scales are marked with numbers to assist in soil sample positioning. Preferably, the positioning mark 3 can also be set to be detachably connected to the receiving groove 1. The positioning mark 3 is, for example, an identification ring detachably connected to the outer edge of the receiving groove 1 by a buckle or a thread. It can be installed when needed and removed when not needed, thereby improving the flexibility of the device. The positioning mark 3 also adopts a conductor coefficient greater than 35×10 6 Made of S / m material.
[0036] According to a preferred embodiment, the positioning mark 3 can also be a coordinate mark, a digital mark or a Figure 3 The shape marks shown, etc., can assist in identifying the sample location.
[0037] According to a preferred embodiment, the shape of the receiving tank 1 is set to be hemispherical or cylindrical. Preferably, the volume of the receiving tank 1 is at least 3.14 cm 3 , in order to accommodate enough soil samples for observation.
[0038] According to a preferred embodiment, the ratio of the depth to the width of the receiving groove 1 is in the range of 1:2-1:4, so as to be more conducive to the observation of the soil structure.
[0039] According to a preferred embodiment, the fixing member 2 is, for example, a leg nail, which is inserted into the stage to achieve the connection between the sample stage and the stage. The fixing member 2 can also be adapted to the stage connection mode to be set as other connecting members, such as screws, slides, etc.
[0040] The above-mentioned embodiments only express the specific implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the present application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the technical solution concept of the present application, and these all belong to the protection scope of the present application.
Claims
1. An electron microscope sample stage for in-situ observation of soil, characterized in that: The sample stage is mounted on the stage of the electron microscope. The sample stage comprises a receiving groove (1) for loading a sample and a fixing member (2) for connecting the stage, wherein the fixing member (2) is connected to the receiving groove (1); The receiving groove (1) has an opening, and the sample stage is provided with a positioning mark (3) on a side surface of the opening, and the positioning mark (3) is connected to the receiving groove (1). The fixing member (2) and the receiving groove (1) use a conductor coefficient greater than 35×10 6 Made of S / M material.
2. The electron microscope sample stage for in-situ observation of soil according to claim 1, characterized in that: The connection position of the positioning mark (3) is arranged so that the positioning mark (3) and the sample in the containing groove (1) can be seen simultaneously in the microscopic field of view.
3. The electron microscope sample stage for in-situ observation of soil according to claim 2, characterized in that: The positioning mark (3) is configured to be detachably connected to the containing groove (1).
4. The electron microscope sample stage for in-situ observation of soil according to claim 2, characterized in that: The positioning mark (3) is arranged to be fixedly connected to the containing groove (1).
5. The electron microscope sample stage for in-situ observation of soil according to claim 4, characterized in that: The positioning mark (3) is arranged at the opening edge of the containing groove (1), and the positioning mark (3) is arranged to adopt a conductive coefficient greater than 35×10 6 Made of S / M material.
6. The electron microscope sample stage for in-situ observation of soil according to claim 5, characterized in that: The positioning mark (3) is set as an angle mark with the center of the accommodating groove (1) as the center of the circle.
7. The electron microscope sample stage for in-situ observation of soil according to claim 2, characterized in that: The positioning mark (3) can be a coordinate mark or a shape mark.
8. The electron microscope sample stage for in-situ observation of soil according to claim 1, characterized in that: The shape of the receiving groove (1) is set to be hemispherical or cylindrical.
9. The electron microscope sample stage for in-situ observation of soil according to claim 8, characterized in that: The volume of the receiving tank (1) is at least 3.14 cm 3 , making it possible to accommodate enough soil samples for observation.
10. The electron microscope sample stage for in-situ observation of soil according to claim 9, characterized in that: The ratio of the depth to the width of the containing groove (1) is in the range of 1:2-1:4.