Low-energy-consumption high-temperature high-pressure optimized CVD culture diamond device

Abstract

The utility model discloses a kind of low-energy-consumption high temperature high pressure optimization CVD cultivation diamond device, belong to superhard material processing field.Device includes talc schist composite block, talc schist ring one, steel cap one, dolomite filling core one, porcelain sheet one, graphite sheet one, temperature ring one, small graphite sheet one, dolomite ring one, mixed heat source one, outer insulation tube, graphite tube, inner insulation tube, filling sheet one, filling medium CVD cultivation diamond, filling sheet two, mixed heat source two, dolomite ring two, small graphite sheet two, temperature ring two, graphite sheet two, porcelain sheet two, dolomite filling core two, steel cap two, talc schist ring two.Due to the use of relatively large steel cap can effectively reduce synthesis pressure, while using mixed heat source resistance value is high, heating rate is high, temperature distribution is more uniform, assembly adjustment is more convenient, effectively reduce the energy consumption of synthesis diamond large single crystal.

Description

Technical Field

[0001] This utility model relates to a low-energy-consumption, high-temperature and high-pressure optimized CVD grown diamond device, belonging to the field of superhard material processing. Background Technology

[0002] For CVD diamonds to grow white directly, they need to grow slowly at a rate of 4-5 micrometers per hour, and a 1-carat diamond would take approximately 40 days to grow. If the growth rate is doubled, it can be grown in about 20 days, but it will have a light brown tint. This light brown tint will be eliminated after high temperature and pressure (HTHP) color modification.

[0003] High-temperature, high-pressure (HTHP) treatment of CVD-grown diamonds can eliminate or reduce undesirable colors such as brown. For example, the brown tinge in fast-growing CVD diamonds can be improved through HPHT color modification. In terms of cost, it is lower than the cost of directly growing white diamonds at a very slow rate; rapid growth followed by color modification is relatively more economical and efficient. Regarding color stability, CVD-grown diamonds treated with HPHT maintain a stable color over the long term without changing, and will not affect the wearer's color, such as fading or yellowing. In terms of safety, HPHT-treated lab-grown diamonds pose no harm to the wearer and will not cause any adverse changes to the quality or value of the diamond itself.

[0004] As the number of CVD-grown diamonds undergoing optimization increases, the optimization chambers of the synthetic blocks also grow larger, leading to higher pressure losses and energy consumption. Consequently, heating methods using small steel caps and ordinary heat sources suffer from low resistance, low heat generation rate, high pressure losses, and high energy consumption, and are also cumbersome to assemble and adjust. These factors contribute to the high energy consumption of high-temperature, high-pressure optimized CVD-grown diamonds. Summary of the Invention

[0005] The purpose of this invention is to provide a low-energy-consumption, high-temperature and high-pressure optimized CVD diamond growing device. This device uses a relatively large steel cap and ceramic plate in combination and a mixed heat source for auxiliary heating, which can reduce the energy consumption used in high-temperature and high-pressure optimized CVD diamond growing and thus reduce the synthesis cost.

[0006] This utility model is achieved according to the following technical solution:

[0007] A low-energy, high-temperature, high-pressure optimized CVD diamond growing device includes:

[0008] A pyrophyllite composite block, with a through hole in the middle that runs through its upper and lower surfaces;

[0009] An insulating tube assembly is placed in the through hole of the pyrophyllite composite block, and a CVD-grown diamond is placed at the center of the through hole of the insulating tube assembly.

[0010] A filling component, placed in the through-hole of the insulating tube assembly, is used to encapsulate the CVD-grown diamond;

[0011] A mixed heat source is placed at the upper end and the lower end of the through hole of the insulating tube assembly, respectively;

[0012] The stone ring assembly is respectively placed at the upper end and the lower end of the through hole of the pyrophyllite composite block;

[0013] Steel caps are placed at the upper end of the through hole of the upper stone ring assembly and at the lower end of the through hole of the lower stone ring assembly, respectively.

[0014] The ceramic pieces were placed in the upper and lower steel caps, respectively.

[0015] Temperature-changing rings are respectively placed at the lower end of the through hole of the upper stone ring assembly and the upper end of the through hole of the lower stone ring assembly;

[0016] The graphite sheet assemblies are respectively placed between the upper steel cap and the temperature-changing ring, and between the lower steel cap and the temperature-changing ring.

[0017] In some embodiments, the insulating tube assembly comprises an inner insulating tube, an outer insulating tube, and a graphite tube located between the inner and outer insulating tubes.

[0018] In some embodiments, the filling assembly includes a first filling sheet, a second filling sheet, and a filling medium; the first filling sheet is placed at the upper end of the through-hole of the inner insulating tube, the second filling sheet is placed at the lower end of the through-hole of the inner insulating tube, and the filling medium is placed in the through-hole of the inner insulating tube, located between the first filling sheet and the second filling sheet; the CVD-grown diamond is placed in the filling medium.

[0019] In some embodiments, both the upper and lower steel caps have inward openings, the ceramic tile is located at the opening of the steel cap, and a dolomite core is provided in the steel cap.

[0020] In some embodiments, the stone ring assembly placed at the upper end of the through hole of the pyrophyllite composite block consists of a pyrophyllite ring one and a dolomite ring one placed at the lower end of the pyrophyllite ring; the stone ring assembly placed at the lower end of the through hole of the pyrophyllite composite block consists of a pyrophyllite ring two and a dolomite ring two placed at the lower end of the pyrophyllite ring two.

[0021] In some embodiments, the upper graphite sheet assembly and the temperature-changing ring are both placed in a first dolomite ring; the lower graphite sheet assembly and the temperature-changing ring are both placed in a second dolomite ring.

[0022] In some embodiments, the graphite sheet assembly comprises a graphite sheet and a small graphite sheet; wherein the graphite sheet is placed between the steel cap and the temperature-changing ring, and the small graphite sheet is placed inside the temperature-changing ring.

[0023] In some embodiments, the diameter of the steel cap is 28 mm.

[0024] In some embodiments, the mixed heat source is a mixture of ceramic powder and graphite powder; wherein the graphite content of the mixed heat source is 10%-12%.

[0025] The advantages of this utility model over the prior art are:

[0026] The use of a relatively large steel cap with added ceramic plates effectively reduces the synthesis pressure. At the same time, the use of a mixed heat source with high resistance, high heating rate, more uniform temperature distribution, and easier assembly and adjustment effectively reduces the energy consumption of high-temperature and high-pressure optimized CVD grown diamonds. Attached Figure Description

[0027] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0028] In the attached diagram:

[0029] Figure 1 This is a schematic diagram of a low-energy-consumption, high-temperature, and high-pressure optimized CVD diamond growing device according to this utility model.

[0030] Figure labels: 1. Pyrophyllite composite block; 2. Dolomite ring; 3. Pyrophyllite ring; 4. Steel cap; 5. Dolomite core filler; 6. Ceramic sheet; 7. Graphite sheet; 8. Small graphite sheet; 9. Variable temperature ring; 10. Mixed heat source; 11. Outer insulation tube; 12. Graphite tube; 13. Inner insulation tube; 14. Mixed heat source II; 15. Variable temperature ring II; 16. Small graphite sheet II; 17. Graphite sheet II; 18. Ceramic sheet II; 19. Dolomite core filler II; 20. Steel cap II; 21. Pyrophyllite ring II; 22. Dolomite ring II; 23. Filler sheet II; 24. Filler medium; 25. CVD cultured diamond; 26. Filler sheet I.

[0031] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0033] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] like Figure 1 As shown, this utility model provides a low-energy-consumption, high-temperature, and high-pressure optimized CVD-grown diamond device, including a pyrophyllite composite block 1, a dolomite ring 2, a pyrophyllite ring 3, a steel cap 4, a dolomite core filler 5, a ceramic sheet 6, a graphite sheet 7, a small graphite sheet 8, a variable-temperature ring 9, a mixed heat source 10, an outer insulating tube 11, a graphite tube 12, an inner insulating tube 13, a mixed heat source 2 14, a variable-temperature ring 2 15, a small graphite sheet 2 16, a graphite sheet 2 17, a ceramic sheet 2 18, a dolomite core filler 2 19, a steel cap 20, a pyrophyllite ring 2 21, a dolomite ring 2 22, a filler sheet 2 23, a filler medium 24, a CVD-grown diamond 25, and a filler sheet 26.

[0036] The connection relationships of the above components are given below:

[0037] Continue to refer to Figure 1As shown, the pyrophyllite composite block 1 has a through hole in the middle, penetrating the upper and lower surfaces of the pyrophyllite composite block 1. Pyrophyllite ring 3 is placed at the upper end of the through hole in the middle of the pyrophyllite composite block 1, pyrophyllite ring 21 is placed at the lower end of the through hole in the middle of the pyrophyllite composite block 1, steel cap 4 is placed in pyrophyllite ring 3, steel cap 20 is placed in pyrophyllite ring 21, dolomite core 5 is placed in steel cap 4, and dolomite core 19 is placed in... Within steel cap 20, ceramic piece 6 is placed at the lower end of dolomite core 5 within steel cap 4; ceramic piece 218 is placed at the upper end of dolomite core 19 within steel cap 20; dolomite ring 2 is placed at the lower end of pyrophyllite ring 3; dolomite ring 22 is placed at the upper end of pyrophyllite ring 21; graphite piece 7 is placed at the lower end of steel cap 4 within dolomite ring 2; and graphite piece 217 is placed at the upper end of steel cap 20 within dolomite ring 22. Temperature-changing ring 19 is placed at the lower end of graphite sheet 7 in dolomite ring 2; temperature-changing ring 215 is placed at the upper end of graphite sheet 17 in dolomite ring 22; small graphite sheet 8 is placed in temperature-changing ring 19; small graphite sheet 16 is placed in temperature-changing ring 215; outer insulating tube 11 is placed at the upper end of dolomite ring 22 in the through hole of pyrophyllite composite block 1; mixed heat source 10 is placed at the upper end of the through hole of outer insulating tube 11; mixed heat source 24 is placed at the lower end of the through hole of outer insulating tube 11; graphite tube 12 is placed at the upper end of mixed heat source 24 in outer insulating tube 11; inner insulating tube 13 is placed in graphite tube 12; filler sheet 126 is placed at the upper end of the through hole of inner insulating tube 13; filler sheet 23 is placed at the lower end of the through hole of inner insulating tube 13; filling medium 24 is placed at the upper end of filler sheet 23 in inner insulating tube 13; and CVD cultured diamond 25 is placed in filling medium 24.

[0038] Further options: Continue to refer to Figure 1 As shown, both steel cap 14 and steel cap 20 are filled with dolomite core 15, dolomite core 29 and ceramic tile 16 and ceramic tile 28.

[0039] Further options: Continue to refer to Figure 1 As shown, the diameters of steel cap 1 (4) and steel cap 2 (20) are both 28 mm. The use of relatively large steel caps can effectively reduce the synthesis pressure.

[0040] Further options: Continue to refer to Figure 1 As shown, CVD-grown diamond 25 is placed in filling medium 24.

[0041] Further options: Continue to refer to Figure 1 As shown, the graphite content in both mixed heat source 10 and mixed heat source 2 14 is 10%-12%. The manufacturing process is as follows: ceramic powder (magnesium oxide, zirconium oxide, aluminum oxide) is added to graphite powder and ball-milled for 6-12 hours. After pressing and molding, it is fired at 1000℃-1500℃ in vacuum for 2-4 hours.

[0042] The advantages of a hybrid heat source are: high resistance and high heat generation rate, which can effectively reduce power consumption. When adjusting the growth process, only the graphite content needs to be adjusted, and the height of the assembly does not need to be adjusted. There is no local overheating phenomenon, and the temperature distribution is uniform.

[0043] In summary, this utility model provides a low-energy-consumption, high-temperature, and high-pressure optimized CVD diamond cultivation device. Pyrophyllite rings one and two are placed at the upper and lower ends of the through-hole of the pyrophyllite composite block. Steel caps one and two are placed inside pyrophyllite rings one and two. Dolomite rings one and two are placed at the upper and lower ends of pyrophyllite rings one and two in the through-hole of the pyrophyllite block. Dolomite core fillers one and two and ceramic plates one and two are placed inside steel caps one and two. Graphite plates one and two are placed at the upper and lower ends of steel caps one and two. Small graphite plates one and two are placed inside temperature-changing rings one and two. Temperature-changing rings one and two are placed at the upper and lower ends of graphite plates one and two. An outer insulating tube is located at the lower end of dolomite ring two. Mixing heat sources one and two are placed at the upper and lower ends of the through-hole of the outer insulating tube. A graphite tube is placed at the upper end of mixing heat source two in the through-hole of the outer insulating tube. An inner insulating tube is placed in the graphite tube. Filler plates one and two are placed at the upper and lower ends of the through-hole of the graphite tube. A filling medium is placed at the upper end of filler plate two in the inner insulating tube. CVD-grown diamonds are placed in the filling medium. This invention is used to optimize CVD-grown diamonds under high temperature and high pressure. The use of a relatively large steel cap can effectively reduce the synthesis pressure. At the same time, the use of a mixed heat source with high resistance, high heating rate, more uniform temperature distribution, and more convenient assembly and adjustment can effectively reduce the energy consumption of synthesizing large single crystal diamonds.

[0044] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0045] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features found in other embodiments but not others, combinations of features from different embodiments are also within the scope of protection of this invention and form different embodiments. For example, in the embodiments described above, those skilled in the art can use them in combination based on known technical solutions and the technical problems to be solved by this application.

[0046] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A low-energy-consumption, high-temperature, and high-pressure optimized CVD diamond growing device, characterized in that, include: A pyrophyllite composite block, with a through hole in the middle that runs through its upper and lower surfaces; An insulating tube assembly is placed in the through hole of the pyrophyllite composite block, and a CVD-grown diamond is placed at the center of the through hole of the insulating tube assembly. A filling component, placed in the through-hole of the insulating tube assembly, is used to encapsulate the CVD-grown diamond; A mixed heat source is placed at the upper end and the lower end of the through hole of the insulating tube assembly, respectively; The stone ring assembly is respectively placed at the upper end and the lower end of the through hole of the pyrophyllite composite block; Steel caps are placed at the upper end of the through hole of the upper stone ring assembly and at the lower end of the through hole of the lower stone ring assembly, respectively. The ceramic pieces were placed in the upper and lower steel caps, respectively. Temperature-changing rings are respectively placed at the lower end of the through hole of the upper stone ring assembly and the upper end of the through hole of the lower stone ring assembly; The graphite sheet assemblies are respectively placed between the upper steel cap and the temperature-changing ring, and between the lower steel cap and the temperature-changing ring.

2. The low-energy-consumption, high-temperature, high-pressure optimized CVD diamond growing device according to claim 1, characterized in that: The insulating tube assembly consists of an inner insulating tube, an outer insulating tube, and a graphite tube located between the inner and outer insulating tubes.

3. The low-energy-consumption, high-temperature, high-pressure optimized CVD diamond growing device according to claim 2, characterized in that: The filling assembly includes a first filling sheet, a second filling sheet, and a filling medium; the first filling sheet is placed at the upper end of the through hole of the inner insulating tube, the second filling sheet is placed at the lower end of the through hole of the inner insulating tube, and the filling medium is placed in the through hole of the inner insulating tube and located between the first filling sheet and the second filling sheet; the CVD grown diamond is placed in the filling medium.

4. The low-energy-consumption, high-temperature, high-pressure optimized CVD diamond growing device according to claim 1, characterized in that: Both the upper and lower steel caps have inward openings, and the ceramic tile is located at the opening of the steel cap. A dolomite core is provided in the steel cap.

5. The low-energy-consumption, high-temperature, high-pressure optimized CVD diamond growing device according to claim 1, characterized in that: The stone ring assembly placed at the upper end of the through hole of the pyrophyllite composite block consists of a pyrophyllite ring one and a dolomite ring one placed at the lower end of the pyrophyllite ring; the stone ring assembly placed at the lower end of the through hole of the pyrophyllite composite block consists of a pyrophyllite ring two and a dolomite ring two placed at the lower end of the pyrophyllite ring two.

6. The low-energy-consumption, high-temperature, high-pressure optimized CVD diamond growing device according to claim 5, characterized in that: The upper graphite sheet assembly and the temperature-changing ring are both placed in dolomite ring one; the lower graphite sheet assembly and the temperature-changing ring are both placed in dolomite ring two.

7. The low-energy-consumption, high-temperature, high-pressure optimized CVD diamond growing device according to claim 5, characterized in that: The graphite sheet assembly consists of a graphite sheet and small graphite sheets; wherein the graphite sheet is placed between the steel cap and the temperature-changing ring, and the small graphite sheet is placed inside the temperature-changing ring.

8. The low-energy-consumption, high-temperature, high-pressure optimized CVD diamond growing device according to claim 1, characterized in that: The diameter of the steel cap is 28mm.

9. The low-energy-consumption, high-temperature, high-pressure optimized CVD diamond growing device according to claim 1, characterized in that: The mixed heat source is a mixture of ceramic powder and graphite powder; wherein the graphite content of the mixed heat source is 10%-12%.

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