Large-sized lab-grown diamond synthetic blocks

Abstract

This invention relates to the field of diamond synthesis technology and discloses a large-size lab-grown diamond synthesis block, comprising a pyrophyllite synthesis block with an outer liner tube inside. A nickel strip is wound around the outer liner tube. Pyrophyllite rings, dolomite rings, temperature-regulating rings, iron sheets, and molybdenum rings are symmetrically arranged on the upper and lower sides of the outer liner tube. The interiors of the pyrophyllite rings and the dolomite rings are connected to form a receiving cavity. The receiving cavity contains a steel ring, a graphite sheet, and a molybdenum sheet. An iron pillar is located within the temperature-regulating ring. A graphite tube is located within the outer liner tube, containing an upper BON sheet, an insulating tube, and a lower BON sheet. The insulating tube contains a nickel sheet, a samarium oxide sheet, a graphite sheet, a carbon ring, a catalyst sheet, a titanium sheet, a catalyst sheet, a graphite sheet, a catalyst sheet, a copper sheet, a crystal bed, and a nickel sheet. A fourth catalyst sheet is located within the carbon ring. A seed crystal is located on the crystal bed, and a platinum sheet covers the seed crystal. This invention can improve the quality and value of lab-grown diamonds and meet market demand.

Description

Technical Field

[0001] This invention relates to the field of diamond synthesis technology, and more particularly to a large-size cultured diamond synthesis block. Background Technology

[0002] When synthesizing diamonds using existing synthetic blocks, the resulting diamonds typically suffer from problems such as small size, poor color, low crystal aspect ratio, low yield of high-quality crystals, and poor product stability. This results in lower diamond quality and value, significantly limiting their application in various industries and fields, and failing to meet market demand for lab-grown diamonds. Therefore, based on the aforementioned technical problems, there is an urgent need for a large-size lab-grown diamond synthetic block. Summary of the Invention

[0003] To address the technical problems existing in the prior art, this invention provides a large-size synthetic block of lab-grown diamonds.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a large-size cultured diamond synthetic block, comprising a pyrophyllite synthetic block, wherein the pyrophyllite synthetic block is provided with an outer liner tube, the outer liner tube is wound with a nickel strip, and the upper and lower sides of the outer liner tube are symmetrically provided with a pyrophyllite ring, a dolomite ring, a temperature regulating ring, an iron sheet, and a molybdenum ring from the outside to the inside. The interior of the pyrophyllite ring and the interior of the dolomite ring are connected and form a receiving cavity, and a steel ring, a graphite sheet, etc. are arranged from the outside to the inside of the receiving cavity. The device comprises a molybdenum sheet, an iron pillar inside the temperature regulating ring, a graphite tube inside the outer liner tube, and an upper BON sheet, an insulating tube, and a lower BON sheet arranged sequentially from top to bottom inside the graphite tube. The insulating tube also contains, from top to bottom, a nickel sheet, a samarium oxide sheet, a graphite sheet, a carbon ring, a catalyst sheet, a titanium sheet, a catalyst sheet, a graphite sheet, a catalyst sheet, a copper sheet, a crystal bed, and another nickel sheet. A fourth catalyst sheet is located inside the carbon ring, and a seed crystal is located on the crystal bed, with a platinum sheet covering the seed crystal.

[0005] Preferably, the thickness of the nickel strip is 0.15 mm.

[0006] Preferably, the graphite sheet has a thickness of 2 mm, the molybdenum sheet has a thickness of 0.3 mm or 0.4 mm, the iron column has a diameter of 9-12 mm, the iron sheet has a thickness of 1 mm, the molybdenum ring has a thickness of 0.2 mm, and the inner diameter is 38-42 mm.

[0007] Preferably, the wall thickness of the outer liner tube is 2.5–3.0 mm, the wall thickness of the graphite tube is 1.0–1.2 mm, the wall thickness of the insulating tube is 1.8–2.2 mm, and the height of the graphite tube is 30–36 mm.

[0008] Preferably, the nickel sheet one has a thickness of 1 mm, the samarium oxide sheet has a thickness of 2-3 mm, the graphite sheet two has a thickness of 3.0 mm, the carbon ring has a thickness of 3 mm and an inner hole diameter of 25-28 mm, the catalyst sheet one has a thickness of 2.5 mm, the titanium sheet has a thickness of 0.09 mm, the catalyst sheet two has a thickness of 2.5 mm, the graphite sheet three has a thickness of 1 mm, the catalyst sheet three has a thickness of 2.5 mm, the copper sheet has a thickness of 0.1 mm, the platinum sheet has a thickness of 0.1 mm and a diameter of 3 mm.

[0009] Preferably, the nickel sheet has a purity of 99.99% or higher and a thickness of 2 mm.

[0010] Preferably, the thickness of the lower BON sheet is 1-2 mm less than the thickness of the upper BON sheet.

[0011] Preferably, catalyst sheet one, catalyst sheet two, catalyst sheet three, and catalyst sheet four are all iron-cobalt alloys and meet the following requirements:

[0012] The iron-cobalt content ratio is 50:50 to 70:30.

[0013] Oxygen content is less than 20 ppm, sulfur content is less than 10 ppm, and boron content is less than 5 ppm.

[0014] Preferably, graphite sheet one, graphite sheet two, and graphite sheet three all meet the following requirements:

[0015] Sulfur content less than 10 ppm, nitrogen content less than 20 ppm, boron content less than 1 ppm, and bulk density greater than 1.9 g / mm³. 3 .

[0016] This invention enables the synthesis of lab-grown diamonds with a size of 3-10 carats, color grade D-F, and clarity grade VVS or higher, thereby improving the quality and value of lab-grown diamonds and meeting market demands. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of this embodiment.

[0018] Figure 2 This is an exploded schematic diagram of the various parts within the pyrophyllite composite block in this embodiment.

[0019] Figure 3 This is an exploded view of the catalyst component in this embodiment.

[0020] Figure 4 This is a schematic diagram of the catalyst assembly and diamond crystal after diamond cultivation in this embodiment.

[0021] Figure 5 This is a schematic diagram of the crystal bed after diamond cultivation in this embodiment.

[0022] Figure 6 This is a schematic diagram of the diamond cultured in this embodiment. Figure 1 .

[0023] Figure 7 This is a schematic diagram of the diamond cultured in this embodiment. Figure 2 .

[0024] In the diagram: 1. Pyrophyllite composite block; 2. Outer liner tube; 3. Nickel strip; 4. Pyrophyllite ring; 5. Dolomite ring; 6. Temperature regulating ring; 7. Iron sheet; 8. Molybdenum ring; 9. Steel ring; 10. Graphite sheet one; 11. Molybdenum sheet; 12. Iron column; 13. Graphite tube; 14. Upper BON sheet; 15. Insulating tube; 16. Lower BON sheet; 17. Nickel sheet one; 18. Samarium oxide sheet; 19. Graphite sheet two; 20. Carbon ring; 21. Catalyst sheet one; 22. Titanium sheet; 23. Catalyst sheet two; 24. Graphite sheet three; 25. Catalyst sheet three; 26. Copper sheet; 27. Crystal bed; 28. Nickel sheet two; 29. ​​Catalyst sheet four. Detailed Implementation

[0025] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Example

[0027] See Figure 1-7 A large-size lab-grown diamond synthetic block includes a pyrophyllite synthetic block 1. The pyrophyllite synthetic block 1 has an outer liner tube 2. The outer liner tube 2 is wrapped with a nickel strip 3. Symmetrically arranged from the outside to the inside on the upper and lower sides of the outer liner tube 2 are a pyrophyllite ring 4, a dolomite ring 5, a temperature-regulating ring 6, an iron sheet 7, and a molybdenum ring 8. The interiors of the pyrophyllite ring 4 and the dolomite ring 5 are connected to form a receiving cavity. Inside the receiving cavity, from the outside to the inside, are a steel ring 9, a graphite sheet 10, and a molybdenum sheet 11. An iron pillar 12 is located inside the temperature-regulating ring 6. A stone... The graphite tube 13 contains, from top to bottom, an upper BON sheet 14, an insulating tube 15, and a lower BON sheet 16. The insulating tube 15 contains, from top to bottom, a nickel sheet 17, a samarium oxide sheet 18, a graphite sheet 19, a carbon ring 20, a catalyst sheet 21, a titanium sheet 22, a catalyst sheet 23, a graphite sheet 24, a catalyst sheet 25, a copper sheet 26, a crystal bed 27, and a nickel sheet 28. The carbon ring 20 contains a catalyst sheet 29. The crystal bed 27 has a seed crystal, and the seed crystal is covered with a platinum sheet (not shown in the figure).

[0028] The nickel strip has a thickness of 0.15 mm. The nickel strip serves to isolate harmful substances from entering the growth chamber and to mitigate pressure shocks.

[0029] The graphite sheet 10 has a thickness of 2 mm, the molybdenum sheet 11 has a thickness of 0.3 mm or 0.4 mm, the iron column 12 has a diameter of 9 to 12 mm, the iron sheet 7 has a thickness of 1 mm, the molybdenum ring 8 has a thickness of 0.2 mm, and the inner diameter is 38 to 42 mm.

[0030] The outer liner tube 2 has a wall thickness of 2.5–3.0 mm, the graphite tube 13 has a wall thickness of 1.0–1.2 mm, the insulating tube 15 has a wall thickness of 1.8–2.2 mm, and the graphite tube 13 has a height of 30–36 mm.

[0031] The nickel sheet 17 has a thickness of 1 mm, the samarium oxide sheet 18 has a thickness of 2-3 mm, the graphite sheet 19 has a thickness of 3.0 mm, the carbon ring 20 has a thickness of 3 mm and an inner hole diameter of 25-28 mm, the catalyst sheet 21 has a thickness of 2.5 mm, the titanium sheet 22 has a thickness of 0.09 mm, the catalyst sheet 23 has a thickness of 2.5 mm, the graphite sheet 24 has a thickness of 1 mm, the catalyst sheet 25 has a thickness of 2.5 mm, the copper sheet 26 has a thickness of 0.1 mm, the platinum sheet has a thickness of 0.1 mm and a diameter of 3 mm.

[0032] The nickel sheet has a purity of 99.99% or higher and a thickness of 2mm. The nickel sheet protects lab-grown diamonds from cracking during the decompression process.

[0033] The thickness of the lower BON sheet 16 is 1-2 mm less than the thickness of the upper BON sheet 14. This arrangement is to create a temperature gradient suitable for the growth of lab-grown diamonds.

[0034] Catalyst sheet 1, catalyst sheet 2, catalyst sheet 3, and catalyst sheet 4 are all iron-cobalt alloys and meet the following requirements:

[0035] The iron-cobalt content ratio is 50:50 to 70:30.

[0036] Oxygen content is less than 20 ppm, sulfur content is less than 10 ppm, and boron content is less than 5 ppm.

[0037] Graphite sheet one, graphite sheet two, and graphite sheet three all meet the following requirements:

[0038] Sulfur content less than 10 ppm, nitrogen content less than 20 ppm, boron content less than 1 ppm, and bulk density greater than 1.9 g / mm³. 3 .

[0039] In this embodiment, the graphite sheet is located at the junction of the pyrophyllite ring and the dolomite ring; the outer liner is made of magnesium oxide; the nickel strip 3 serves as an isolation layer to prevent impurities from entering the diamond growth cavity; the graphite tube is used for heating; both the upper and lower BON sheets are barium zirconate sheets (BON sheet is an abbreviation for barium zirconate); the platinum sheet is used to protect the seed crystals on the crystal bed.

[0040] Diamonds synthesized using the large-size lab-grown diamond synthetic blocks of Example 1 were compared with diamonds synthesized using conventional synthetic blocks. The results are shown in Table 1.

[0041] Table 1

[0042] Composite Block Type High crystal yield granularity Crystal aspect ratio waste block rate Production (carats) This composition block 90％ 3-10 carats 0.7 1.7％ 60 Traditional synthesis blocks 60％ 0.2-1 carat 0.5 10％ 40

[0043] The synthesis block of the present invention optimizes the temperature and pressure fields for crystal growth, making the crystal growth environment more stable and improving the ultimate growth rate of high-quality crystals.

[0044] The embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A large-size lab-grown diamond synthetic block, including a pyrophyllite synthetic block, characterized in that, The pyrophyllite composite block is equipped with an outer liner tube, and a nickel strip is wound around the outer liner tube. Symmetrically arranged from the outside to the inside on the upper and lower sides of the outer liner tube are a pyrophyllite ring, a dolomite ring, a temperature regulating ring, an iron sheet, and a molybdenum ring. The interiors of the pyrophyllite ring and the dolomite ring are connected to form a receiving cavity. Within the receiving cavity, from the outside to the inside, are arranged a steel ring, a graphite sheet I, and a molybdenum sheet. An iron column is located inside the temperature regulating ring. A graphite tube is located inside the outer liner tube. From top to bottom, an upper BON sheet, an insulating tube, and a lower BON sheet are arranged inside the graphite tube. From top to bottom, the insulating tube is arranged a nickel sheet I, a samarium oxide sheet, a graphite sheet II, a carbon ring, a catalyst sheet I, a titanium sheet, a catalyst sheet II, a graphite sheet III, a catalyst sheet III, a copper sheet, a crystal bed, and a nickel sheet II. A catalyst sheet IV is located inside the carbon ring. A seed crystal is located on the crystal bed, and a platinum sheet covers the seed crystal. Both the upper and lower BON sheets are barium zirconate sheets. The thickness of the nickel strip is 0.15 mm; The thickness of the lower BON sheet is 1-2 mm less than the thickness of the upper BON sheet; Catalyst sheet 1, catalyst sheet 2, catalyst sheet 3, and catalyst sheet 4 are all iron-cobalt alloys and meet the following requirements: The iron-cobalt content ratio is 50:50 to 70:

30. Oxygen content is less than 20 ppm, sulfur content is less than 10 ppm, and boron content is less than 5 ppm; Graphite sheet one, graphite sheet two, and graphite sheet three all meet the following requirements: Sulfur content less than 10 ppm, nitrogen content less than 20 ppm, boron content less than 1 ppm, and bulk density greater than 1.9 g / mm³. 3 ; The outer liner is made of magnesium oxide, the nickel strip is used to isolate impurities from entering the diamond growth chamber, and the platinum sheet is used to protect the seed crystal on the crystal bed.

2. The large-size lab-grown diamond synthetic block according to claim 1, characterized in that, The graphite sheet has a thickness of 2 mm, the molybdenum sheet has a thickness of 0.3 mm or 0.4 mm, the iron column has a diameter of 9-12 mm, the iron sheet has a thickness of 1 mm, the molybdenum ring has a thickness of 0.2 mm, and the inner diameter is 38-42 mm.

3. The large-size lab-grown diamond synthetic block according to claim 1, characterized in that, The outer liner tube has a wall thickness of 2.5~3.0mm, the graphite tube has a wall thickness of 1.0~1.2mm, the insulating tube has a wall thickness of 1.8~2.2mm, and the graphite tube has a height of 30~36mm.

4. The large-size lab-grown diamond synthetic block according to claim 1, characterized in that, The thickness of the first nickel sheet is 1 mm, the thickness of the samarium oxide sheet is 2-3 mm, the thickness of the second graphite sheet is 3.0 mm, the thickness of the carbon ring is 3 mm, the inner diameter is 25-28 mm, the thickness of the first catalyst sheet is 2.5 mm, the thickness of the first titanium sheet is 0.09 mm, the thickness of the second catalyst sheet is 2.5 mm, the thickness of the third graphite sheet is 1 mm, the thickness of the third catalyst sheet is 2.5 mm, the thickness of the first copper sheet is 0.1 mm, the thickness of the second platinum sheet is 0.1 mm, and the diameter is 3 mm.

5. The large-size lab-grown diamond synthetic block according to claim 1, characterized in that, The nickel sheet has a purity of over 99.99% and a thickness of 2mm.

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