A sample introduction device for GDMS testing of silica powder
By designing a sample introduction device composed of indium conductive sheets, the problems of sample introduction and discharge instability of silica powder in GDMS testing were solved, achieving stable sample introduction and efficient testing of silica powder.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YONGJIANG LAB
- Filing Date
- 2025-08-19
- Publication Date
- 2026-07-21
AI Technical Summary
Silica powder is non-conductive, which makes it impossible for traditional sample introduction devices to directly introduce samples. Furthermore, it is prone to charge accumulation during glow discharge, resulting in unstable discharge and affecting the accuracy and efficiency of test results.
The sample introduction device, which consists of a first conductive sheet and a second conductive sheet made of indium material, forms a receiving cavity through grooves and bosses. The through hole is connected to the receiving cavity to achieve stable sample introduction of silicon dioxide powder and to remove surface charge through the conductive sheet to maintain electrical neutrality.
This method enables direct injection of silica powder, avoiding discharge instability caused by charge accumulation and improving the accuracy and efficiency of testing.
Smart Images
Figure CN224535993U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of sample testing, specifically relating to a sample introduction device for GDMS testing of silica powder. Background Technology
[0002] In glow discharge mass spectrometry (GDMS), silica powder, as an important inorganic material, plays a crucial role in material performance evaluation and quality control through compositional analysis. However, silica powder is a non-conductive material, posing significant technical challenges in existing GDMS testing techniques.
[0003] On the one hand, since silica is non-conductive, traditional sample introduction devices cannot meet the requirements for direct sample introduction, making it difficult to directly test silica powder samples by GDMS. They need to rely on complex pretreatment or indirect testing methods, which are cumbersome and inefficient.
[0004] On the other hand, even if sample introduction is achieved through certain methods, a large amount of charge accumulates on the non-conductive silicon dioxide surface during glow discharge. This charge is difficult to dissipate autonomously, easily causing instability in the discharge process and resulting in drastic fluctuations in the signals of the main element (such as silicon) and impurity elements, severely affecting the accuracy of the test results. Simultaneously, charge accumulation also reduces the signal intensity of the main element and increases the detection limit of impurity elements, further limiting test accuracy and efficiency. Utility Model Content
[0005] The purpose of this invention is to provide a sample introduction device for GDMS testing of silica powder, which solves the problems of sample introduction and discharge instability of silica powder in GDMS testing.
[0006] Therefore, this utility model provides a sample introduction device for GDMS testing of silica powder, comprising:
[0007] A first conductive sheet and a second conductive sheet are attached together, and a receiving cavity is provided between the first conductive sheet and the second conductive sheet for placing silicon dioxide powder.
[0008] Preferably, the first conductive sheet and the second conductive sheet are circular.
[0009] Preferably, the first conductive sheet and the second conductive sheet have the same outer diameter.
[0010] Preferably, one side of the first conductive sheet is provided with a groove, and the other side is provided with a corresponding boss, the groove and the surface of the second conductive sheet forming a receiving cavity.
[0011] Preferably, the boss is provided with a through hole, which communicates with the receiving cavity.
[0012] Preferably, multiple through holes are provided.
[0013] Preferably, the through holes are evenly distributed in a matrix or evenly distributed along the circumference on the boss.
[0014] Preferably, the materials of the first conductive sheet and the second conductive sheet are indium.
[0015] Preferably, the thickness of the first conductive sheet and the second conductive sheet is 0.1mm-1mm.
[0016] Preferably, the first conductive sheet and the second conductive sheet are fixedly connected.
[0017] Beneficial effects:
[0018] This utility model discloses a sample introduction device for GDMS testing of silica powder. With the assistance of a first conductive sheet and a second conductive sheet, it enables the direct introduction of non-conductive silica powder, breaking through the limitations of traditional sample introduction methods. At the same time, it avoids discharge instability and signal fluctuation caused by charge accumulation, thus improving the accuracy of the test. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a schematic diagram of the structure of an embodiment 1 of the GDMS sample introduction device for testing silica powder provided by this utility model.
[0021] Figure 2 A cross-sectional view of Embodiment 1 of a GDMS sample introduction device for testing silica powder provided by this utility model.
[0022] In the figure, 1-first conductive sheet, 11-groove, 12-protrusion, 13-through hole, 2-second conductive sheet, 3-accommodating cavity. Detailed Implementation
[0023] The following detailed description of preferred embodiments of the present invention, along with the included examples, will make the content of the present invention more readily understood. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. In case of any conflict, the definitions in this specification shall prevail.
[0024] Provided such as Figure 1-2 The GDMS sample introduction device for testing silica powder includes: a first conductive sheet 1 and a second conductive sheet 2, the first conductive sheet 1 and the second conductive sheet 2 are attached together, and a receiving cavity 3 is provided between the first conductive sheet 1 and the second conductive sheet 2 for placing silica powder.
[0025] The first conductive sheet 1 and the second conductive sheet 2 are made of indium and are circular with the same outer diameter. This design ensures a tight seal when the two conductive sheets are bonded together, preventing silica powder leakage, and also allows for compatibility with the circular sample inlet of the GDMS equipment, improving the compatibility of the device with the testing equipment.
[0026] One side of the first conductive sheet 1 has a groove 11, and the other side has a corresponding boss 12. The groove 11 and the surface of the second conductive sheet 2 form a receiving cavity 3. The boss 12 has through holes 13 that communicate with the receiving cavity 3. Multiple through holes 13 are provided. The through holes 13 are evenly distributed in a matrix or along the circumference on the boss 12. The receiving cavity 3 can more stably fix the sample, avoiding signal fluctuations caused by sample displacement during testing, and further improving sample introduction stability. The through holes 13 provide a channel for the plasma generated by glow discharge to contact the silica powder inside the receiving cavity 3, ensuring that the plasma can act uniformly on the sample surface and avoiding insufficient signal strength due to the sample being completely sealed. Simultaneously, the multiple through holes 13 evenly distributed in a matrix or along the circumference ensure more uniform contact between the plasma and the sample, reducing local charge accumulation and further stabilizing the discharge process.
[0027] The thickness of the first conductive sheet 1 and the second conductive sheet 2 is 0.1 mm to 1 mm. If the thickness is too thin, it will affect the structural strength and conductivity stability; if it is too thick, it may hinder the contact between the plasma and the sample during the glow discharge process. This range is an optimized choice that balances structural stability and testing efficiency.
[0028] The first conductive sheet 1 and the second conductive sheet 2 are fixedly connected, which can be done by pressing, welding or other methods, to ensure that the two conductive sheets will not shift relative to each other during the test. This ensures the sealing of the cavity 3 and prevents powder leakage, while maintaining the continuity of the charge discharge path. The indium conductive sheets form a complete conductive path through close contact, which efficiently discharges excess charge from the sample surface and maintains the sample's electrical neutrality.
[0029] Working principle: Both the first conductive sheet 1 and the second conductive sheet 2 are made of indium, which has good conductivity. The groove 11 of the first conductive sheet 1 and the surface of the second conductive sheet 2 together form a receiving cavity 3, which is used to place the silica powder sample and achieve stable sample support. During testing, the plasma generated by glow discharge enters the receiving cavity 3 through the through hole 13 on the protrusion 12 of the first conductive sheet 1 and comes into contact with the silica powder sample, satisfying the basic conditions for plasma-sample interaction in GDMS testing. Since silica powder is non-conductive, it is easy for charge to accumulate on its surface under the action of plasma. However, the first conductive sheet 1 and the second conductive sheet 2 are made of indium and are tightly attached to form a continuous conductive path, which can quickly remove the excess charge accumulated on the sample surface and maintain the charge neutrality of the sample surface.
[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. A sample introduction device for GDMS testing of silica powder, characterized in that, include: A first conductive sheet and a second conductive sheet are attached together, and a receiving cavity is provided between the first conductive sheet and the second conductive sheet for placing silicon dioxide powder.
2. The sample introduction device for GDMS testing of silica powder according to claim 1, characterized in that, The first conductive sheet and the second conductive sheet are circular.
3. The sample introduction device for GDMS testing of silica powder according to claim 2, characterized in that, The first conductive sheet and the second conductive sheet have the same outer diameter.
4. The sample introduction device for GDMS testing of silica powder according to claim 1, characterized in that, One side of the first conductive sheet is provided with a groove, and the other side is provided with a corresponding boss. The groove and the surface of the second conductive sheet form a receiving cavity.
5. The sample introduction device for GDMS testing of silica powder according to claim 4, characterized in that, The boss is provided with a through hole, which communicates with the receiving cavity.
6. The sample introduction device for GDMS testing of silica powder according to claim 5, characterized in that, Multiple through holes are provided.
7. The sample introduction device for GDMS testing of silica powder according to claim 6, characterized in that, The through holes are evenly distributed in a matrix or evenly distributed along the circumference on the boss.
8. The sample introduction device for GDMS testing of silica powder according to claim 1, characterized in that, The first conductive sheet and the second conductive sheet are made of indium.
9. The sample introduction device for GDMS testing of silica powder according to claim 1, characterized in that, The thickness of the first conductive sheet and the second conductive sheet is 0.1mm-1mm.
10. The sample introduction device for GDMS testing of silica powder according to claim 1, characterized in that, The first conductive sheet and the second conductive sheet are fixedly connected.