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Diamond surface directional etching method

A technology of diamond and diamond particles, applied in the field of diamond surface directional etching, can solve the problems of pollution, time-consuming, complicated process, etc., and achieve the effects of simple operation method, increased surface roughness and low cost

Pending Publication Date: 2022-05-13
山东昌润钻石股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing surface-etched diamond is synthesized by high-temperature and high-pressure method and then subjected to surface oxidation treatment and acid treatment. This diamond surface etching method is time-consuming, complicated and polluting, and cannot fully meet industrial needs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] see Figure 1-3 , the present invention provides a technical solution: a diamond surface directional etching method, comprising the following steps:

[0028] Step 1). Prepare etching powder, take metal powder and MnO 2 One or more of the three compound powders of , SiC and TiC are mixed to obtain etching powder;

[0029] Step 2). The etching powder obtained in step 1) is mixed with diamond particles, and the ratio of the etching powder and diamond particles is (0.5~3):1;

[0030] Step 3). Add the raw materials obtained in step 2) into the three-dimensional mixer to obtain a uniformly mixed mixture;

[0031] Step 4). Add the mixture obtained in step 3) into an iron metal mold, level the mixture and then compact it into a prefabricated block with a thickness ≤ 1CM;

[0032] Step 5). Place the prefabricated block obtained in step 4) in a high-temperature furnace for reaction. The high-temperature furnace is heated to a set temperature of 600-850° C., kept for 0.5-10 hou...

Embodiment 2

[0044] The surface of the diamond treated by this method is uniformly corroded, the average depth of the pits is 0.1 μm, the crystal grains maintain the original crystal form, and the diamond indicators are the same as those before treatment.

[0045] Specifically, the processing method is the same as in Example 1, except that:

[0046] Step 1) The weight percentage of each component of the etching powder is as follows: Ni: 15%, Co: 16%, Ti: 6%, Al: 1.5%, MnO 2 : 6%, SiC: 1.2%; TiC: 1%, the balance is Fe;

[0047] Step 2) mixing an appropriate proportion of etching powder and diamond particles. The ratio of etching powder to diamond is 2.5:1;

[0048] Step 5) The high-temperature furnace is set to heat up to a set temperature of 700°C for 2 hours: keep warm for 5 hours to stop heating, and then naturally cool to room temperature;

[0049] In the step 1), the meshes of the metal raw materials used in the etching powder are all less than 3000 mesh, and the oxygen content of t...

Embodiment 3

[0051]The diamond surface treated by this method is evenly corroded, and the {111} plane is more severely corroded than the {100} plane, and {111} forms corrosion pits with a triangular or hexagonal outline, with an average pit depth of 0.1 μm, while the {100} plane has only Slightly corroded, the indicators of the diamond are the same as those before treatment.

[0052] Specifically, the processing method is the same as that in Embodiment 2, except that:

[0053] Step 1) The weight percentage of each component of the etching powder is as follows: Ni: 8%, Co: 4%, Ti: 10%, Al: 0.4%, Fe: 12%, SiC: 3%; TiC: 0.5% , the balance being MnO 2 ;

[0054] Step 2) mixing an appropriate proportion of etching powder and diamond particles. The ratio of etching powder to diamond is 1.2:1;

[0055] Step 5) The high-temperature furnace is set to heat up to the set temperature of 800°C for 1.5 hours: keep warm for 4 hours to stop heating, and then naturally cool to room temperature;

[005...

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Abstract

The invention discloses a directional etching method for a diamond surface, which comprises the following steps: respectively taking one or more of five metals of Fe, Ni, Co, Ti and Al and one or more of three compounds of MnO2, SiC and TiC as raw materials of etching powder, mixing the metals with the compounds in proportion, then proportioning the mixed etching powder with diamond particles, and carrying out directional etching on the diamond surface, the preparation method comprises the following steps: adding the proportioned etching powder and diamond particles into a three-dimensional mixer, uniformly mixing, compacting into a prefabricated material block with the thickness of less than or equal to 1cm, reacting in a high-temperature furnace at 600-800 DEG C, and purifying to obtain the surface-etched diamond particles. According to the diamond particles treated through the method, under the condition that various indexes of the diamond particles are guaranteed, the surface roughness of the diamond particles is increased, crystal face corrosion is uniform, different etching powder is selected according to different etching requirements of the diamond particles, the etching degree is accurately controlled by controlling the reaction time and the reaction temperature, and large-scale production can be completely achieved to meet the requirement.

Description

technical field [0001] The invention relates to the technical field of artificial diamond surface treatment, in particular to a diamond surface directional etching method. Background technique [0002] Diamond has excellent physical and chemical properties, such as high hardness, high strength, wear resistance, corrosion resistance and good insulation, making it useful in many fields such as electronic devices, biomedical carriers, biosensors, high-performance electrodes, and chemical analysis sensors. Wide range of applications. However, the surface of natural and synthetic diamonds is very smooth, with high surface energy, and it is difficult to react with other materials. The combination with the binder when making abrasive tools is generally a weak physical combination. Therefore, increasing the reactivity or surface roughness of the diamond surface to reduce its surface energy and increasing its reaction or combination with other substances is an important method to ex...

Claims

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Application Information

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IPC IPC(8): B22F1/12C09K13/00C22C29/00C22C29/12C22C38/06C22C38/10C22C38/14
CPCC22C38/105C22C38/14C22C38/06C22C29/12C22C29/005C09K13/00
Inventor 陈卫民黄灵利杨西滨王力群
Owner 山东昌润钻石股份有限公司
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