Graphite powder tabletting device

Abstract

The utility model discloses a graphite powder tabletting device. The graphite powder tabletting device comprises a tabletting machine upper sheet and a tabletting machine lower sheet, protective gaskets are arranged on the opposite surfaces of the tablet press upper piece and the tablet press lower piece; a to-be-tested sample I is arranged on the surface of the protective gasket, and a to-be-tested sample II to be pressed in is arranged on the surface of the to-be-tested sample I. According to the utility model, the tablet press upper sheet moves downwards, a graphite powder sample is pressed into the indium strip, a uniform and compact module is formed on the indium sheet for testing, and the introduction of pollution caused by adhesion of other materials on the surface of the tablet press upper sheet in the sample preparation process can be effectively reduced through the protection of the protective gasket, namely the tantalum block; and the accuracy and the efficiency of subsequent GDMS testing are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of sample preparation test, specifically relates to a graphite powder tablet press device. BACKGROUND

[0002] The glow discharge mass spectrometry (GDMS) uses a glow discharge source as an ion source, so that the sample is sputtered and ionized under the action of the glow discharge, and the generated ions are separated and detected by a mass analyzer. The glow discharge can produce stable plasma in a low-pressure inert gas atmosphere, the sample is sputtered and ionized as a cathode, forming an ion beam into a mass spectrometer for analysis.

[0003] When testing the graphite powder pressed into the indium bar, the graphite sample needs to be pressed into the indium bar, and a uniform and dense module is formed on the surface of the indium bar, so as to facilitate subsequent testing. At present, when the graphite powder is pressed into the indium bar, i.e. in the process of sample preparation, pollution is easily introduced, thereby affecting the accuracy and efficiency of subsequent testing. UTILITY MODEL CONTENT

[0004] The utility model discloses a graphite powder tablet press device.

[0005] The utility model discloses a graphite powder tablet press device.

[0006] A graphite powder tablet press device, comprising a tablet press upper piece and a tablet press lower piece;

[0007] The opposite surfaces of the tablet press upper piece and the tablet press lower piece are provided with protective gaskets;

[0008] The surface of the protective gasket is provided with a first sample to be tested, and the surface of the first sample to be tested is provided with a second sample to be tested.

[0009] As a further description of the above technical scheme, the protective gasket is a tantalum block.

[0010] As a further description of the above technical scheme, the size of the tantalum block is greater than the size of the second sample to be tested.

[0011] As a further description of the above technical scheme, the size of the tantalum block is not less than 3cm*3cm*1cm.

[0012] As a further description of the above technical scheme, the first sample to be tested is an indium bar, and the second sample to be tested is graphite powder.

[0013] As a further description of the above technical scheme, the surface of the tantalum block is polished and smoothed.

[0014] As a further description of the above technical solution, the tantalum block is pickled.

[0015] As a further description of the above technical solution, the thickness of the two tantalum sheets is the same

[0016] The beneficial effects of the utility model are as follows:

[0017] The utility model presses the graphite powder sample into the indium bar by moving the upper sheet of the tablet press downward, forming a uniform and dense module on the indium sheet for testing, wherein the protection of the protective gasket, that is, the tantalum block, can effectively reduce the adhesion of other materials on the surface of the upper sheet of the tablet press during the sample preparation process, thereby reducing the introduction of contamination, thereby improving the accuracy and efficiency of subsequent GDMS testing.

[0018] In order to more clearly illustrate the structural features and functions of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of a graphite powder tableting device.

[0020] Figure numerals: 1, lower tablet of tablet press; 2, upper tablet of tablet press; 3, indium bar; 4, graphite powder sample; 5, tantalum block 1; 6, tantalum block 2. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0022] like Figure 1 As shown, in one embodiment, a graphite powder tableting device includes an upper tablet press 2 and a lower tablet press 1. Protective gaskets are provided on opposing surfaces of the upper tablet press 2 and the lower tablet press. In this embodiment, the protective gaskets can be tantalum blocks. A tantalum block 1 5 is fixed to the lower surface of the upper tablet press 2, and a tantalum block 2 6 is fixed to the upper surface of the lower tablet press 1. The surfaces of the tantalum blocks 1 5 and 2 6 are both smooth and flat.

[0023] The first sample to be tested is placed on the surface of the protective gasket, and the second sample to be tested is set on the surface of the first sample to be tested to be pressed in. In some embodiments, the first sample to be tested is an indium bar 3, and the second sample to be tested is a graphite powder sample 4.

[0024] In use, the graphite powder sample 4 is pressed into the indium strip 3 by moving the tablet press upper punch 2 downward, forming a uniform and dense module on the indium tablet for testing, wherein the protection of the protective pad, i.e., the tantalum block, can effectively reduce the adhesion of other materials to the surface of the tablet press upper punch 2 during the sample preparation process, thereby reducing the introduction of contamination and improving the accuracy and efficiency of subsequent GDMS testing.

[0025] Alternatively, the tablet press upper punch 2 can be an upper punch of a single punch tablet press, which presses the material into a tablet under the action of a hydraulic rod or other power mechanism, and the tablet press lower punch 1 can be a workbench surface for carrying the material.

[0026] Alternatively, the size of the tantalum block is greater than the size of the second sample to be tested, specifically, the size of the tantalum block is not less than 3cm*3cm*1cm, so that the tantalum block can effectively support the first sample to be tested and the second sample to be tested, reducing the deviation of the indium strip 3 during the pressing of the graphite powder, thereby causing the experiment to fail.

[0027] Alternatively, the tantalum block is subjected to acid pickling treatment, i.e., the tantalum block is cleaned in a mixed solution of nitric acid and hydrofluoric acid, so that the surface impurities and wear residue impurities of the tantalum block are cleaned to ensure that the tantalum block does not bring other metal impurities to contaminate the sample during tablet pressing of the graphite powder.

[0028] Alternatively, the thickness of the two tantalum blocks can be the same, i.e., the thickness is 3cm. In some embodiments, the thickness of the two tantalum blocks can also be different, such as the thickness of the tantalum block 5 is 4cm and the thickness of the tantalum block 6 is 3cm. The thickness can be set according to actual needs.

[0029] Alternatively, the tantalum block, the tablet press upper punch 2 and the tablet press lower punch can be connected by bolts, i.e., threaded holes are formed at the edges of the tantalum block, and the bolts are inserted to fixedly connect the tantalum block with the tablet press upper punch 2 or the lower punch. Forming the threaded holes at the edges can avoid the adverse effects of the threaded holes on the pressing of the graphite powder into the indium strip 3.

[0030] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application should not be limited to the embodiments shown herein, but should be consistent with the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A graphite powder tableting device, characterized in that: Including tablet press loading and tablet press unloading; The opposing surfaces of the upper tablet of the tablet press and the lower tablet of the tablet press are both provided with protective pads; A first sample to be tested is provided on the surface of the protective gasket, and a second sample to be tested to be pressed is provided on the surface of the first sample to be tested.

2. The graphite powder tableting device according to claim 1, characterized in that The protective gasket is a tantalum block.

3. The graphite powder tableting device according to claim 2, characterized in that: The size of the tantalum block is larger than that of the second sample to be tested.

4. The graphite powder tableting device according to claim 2, characterized in that: The size of the tantalum block is not less than 3cm*3cm*1cm.

5. The graphite powder tableting device according to claim 1, characterized in that: The first test sample is an indium bar, and the second test sample is graphite powder.

6. The graphite powder tableting device according to claim 2, characterized in that: The surface of the tantalum block is polished and smoothed.

7. The graphite powder tableting device according to claim 2, characterized in that: The tantalum block is pickled.

8. The graphite powder tableting device according to claim 2, characterized in that: The two tantalum sheets have the same thickness.

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