Two-sided diamond deposition structure sharing graphite column

Abstract

The utility model belongs to the technical field of synthetic cultivation of diamonds or novel artificial synthesis of diamonds, and particularly relates to a two-sided diamond deposition structure sharing a graphite column, which comprises an internal synthetic body, composite pyrophyllite outer cavities positioned at the upper part and the lower part of the internal synthetic body, and heat-insulating conductive heating components positioned at the left side and the right side of the internal synthetic body, the internal synthesis body comprises a flaky graphite column in the center, catalyst layers on the left side and the right side of the graphite column, insulating deposition sheets on the outer sides of the catalyst layers and insulating shielding tubes; the heat preservation conductive assembly comprises a conductive carbon sheet, a graphite pipe, a heating resistance sheet and a magnesium oxide ring, and further comprises a cylindrical metal chromium sheet and a conductive steel ring arranged outside the cylindrical metal chromium sheet in a sleeving mode. The graphite column serving as a shared carbon source is located in a high-temperature area in the structural block, the deposition insulating sheets inlaid with the seed crystals are located in low-temperature areas at two ends, the structure is simple, the number of accessories is small, and practicability is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of synthetic cultured diamonds or novel artificial synthetic diamonds, and particularly relates to a double-sided diamond deposition structure sharing a graphite column. Background Art

[0002] In recent years, the market for synthetic diamonds has developed rapidly, with the domestic annual output value and economic benefits of approximately 1-2 billion. With the gradual improvement of technology and the intensification of market competition, the price of diamond blanks began to fall continuously in the second half of 2022, resulting in a significant reduction in corporate profits and even losses. The industry technology needs a major change. The existing diamond building blocks are designed with a temperature difference in the vertical direction of the heating tube, and half of the space inside the building block cavity is filled with insulation materials. The low utilization rate and low single-block output are the main reasons for the losses. How to make full use of the space occupied by the filling piece and grow diamonds is the key to increasing block production and benefits. Therefore, it is an urgent problem to reasonably design the internal space of the building block, adjust the new temperature field, increase the single-block output of diamonds, and invent a new diamond deposition block. Summary of the invention

[0003] The purpose of the utility model is to provide a double-sided diamond deposition structure of a common graphite column. Through the temperature difference generated by lateral heating, the carbon atoms in the graphite column in the central high-temperature area are better deposited as diamonds at both ends. The graphite column is in the high-temperature area of ​​the building block as a common carbon source, and the deposition insulation sheet embedded with the seed crystal is in the low-temperature area at both ends. The structure is simple, the number of accessories is small, the practicality is strong, the stability is good during the production process, and the growth rate of diamond and the quality of the crystal are easy to control. The output is increased by about 50% compared with the existing single layer, and the quality is increased by about 30% compared with the existing traditional multi-layer synthesis block. The economic benefits have been significantly enhanced. Reasonable setting of the working parameters of the six-sided top press can synthesize 1-5 carats of high-quality double-sided diamond deposition cakes.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A double-sided diamond deposition structure with a common graphite column, comprising an internal synthesis body and a composite pyrophyllite outer cavity located at the upper and lower parts of the internal synthesis body, and a heat-insulating conductive heating component located on the left and right sides thereof; the internal synthesis body comprises a flaky graphite column vertically arranged at the center, a catalyst layer located on the left and right sides of the graphite column, and an insulating deposition sheet located outside each catalyst layer, seed crystals are pre-embedded on the surface of the insulating deposition sheet to guide the conversion of diamond deposition, the insulating deposition sheet, the catalyst layer, and the flaky graphite column are of the same height and are covered by a transversely arranged insulating shielding tube on the outside; the heat-insulating conductive component comprises a conductive carbon sheet, a graphite tube, a heating resistor sheet, and a magnesium oxide ring, the left and right ends of the insulating shielding tube are blocked by conductive carbon sheets and the periphery is covered by a transversely arranged graphite tube, the periphery of the conductive carbon sheet is surrounded by a vertically arranged annular heating resistor sheet, the heating resistor sheet is located at the center of the conductive carbon sheet and the height is lower than the heating resistor sheet. The heating resistor is provided with a magnesium oxide ring at the upper and lower ends respectively; compared with the traditional upper and lower heating structure, the temperature gradient generated by lateral heating can be transmitted to both ends, so that the graphite column placed in the center is driven by the temperature gradient to deposit diamonds on two insulating sheets embedded with seed crystals placed at both ends. The seed crystals are in the low-temperature areas at both ends, and the catalyst graphite column is in the high-temperature area in the center. The temperature gradient generated by lateral heating better promotes the conversion and deposition of the carbon atoms in the center to the diamonds at both ends; the two catalysts are placed at both ends of the graphite column, and the width of the catalysts at both ends can be flexibly changed to adjust the growth space of the growing diamond (i.e., the growth time, which affects the particle size of the cultivated diamond). The graphite column can be customized according to the growth time of the diamond. The heating resistor can adjust the size without affecting the substantial changes of the overall building block. The resistor is mixed and pressed by graphite and ceramic powder, and the heat generation can be adjusted to control the lateral temperature difference to control the deposition rate of diamonds at each end of the building block.

[0006] Furthermore, the thermal insulation and conductive component also includes a cylindrical metal chromium sheet vertically arranged and sleeved outside the internal synthetic body. The chromium sheet has a thickness of 1-2 mm and is resistant to high temperature and corrosion. It can protect the new steel ring from resistance fluctuations and shutdown during the production of cultured diamonds. It also includes a conductive steel ring sleeved outside the cylindrical metal chromium sheet. The height of the conductive steel ring and the cylindrical metal chromium sheet is the same as the outer diameter of the graphite tube.

[0007] Furthermore, the composite pyrophyllite includes pyrophyllite sheets, dolomite sheets and magnesium oxide sheets arranged in sequence from top to bottom. The outer diameters of the dolomite sheets and the magnesium oxide sheets are the same as those of the magnesium oxide rings. A circular groove is provided in the center of the pyrophyllite sheet for placing the dolomite sheets and the magnesium oxide sheets. The outer diameter of the pyrophyllite sheet is the same as that of the conductive steel ring. The composite pyrophyllite includes an inner sleeve magnesium oxide layer, a middle sleeve dolomite layer and an outer pyrophyllite. Compared with traditional pyrophyllite, it has better thermal insulation, pressure transmission and stability.

[0008] Furthermore, the conductive steel ring is filled with magnesium oxide, and the catalyst layer is an alloy catalyst made of iron-cobalt-nickel-titanium-copper composite material smelted at high temperature. The alloy catalyst uses iron-cobalt-nickel-titanium-copper composite material as a catalyst, with iron-cobalt-nickel accounting for 99-98% and titanium-copper accounting for 1-2%; the insulating shielding tube is made of a mixture of magnesium oxide and cesium chloride through granulation, pressing and sintering.

[0009] The above device is matched with a domestic six-sided top press with a cylinder of φ800. When the top hammer has a hammer face of 62*62mm, the pressure is set to 75-78Mpa, and the power is 6.2-6.5 kilowatts. The heated end of the structural block is placed horizontally on the top hammer face of the six-sided top press. After 48-144 hours, a 1-5 carat high-quality double-sided diamond deposition cake can be synthesized.

[0010] The utility model has the following advantages: compared with the traditional diamond structural block, the invention has fewer types of internal materials, the assembly can be flexibly changed, the structure is stable, and one deposition block can produce double-sided diamond cakes, the output is greatly improved, and in actual industrial production, it is easy to control the particle size and growth rate of diamonds, the applicability is strong, the application value is high, and the economic benefits can be increased by 30-50%. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model. DETAILED DESCRIPTION

[0012] like Figure 1As shown, a double-sided diamond deposition structure of a common graphite column comprises an internal synthesis body and a composite pyrophyllite outer cavity located at the upper and lower parts of the internal synthesis body and a heat-insulating conductive heating component located on the left and right sides thereof; the internal synthesis body comprises a flaky graphite column 1 vertically arranged at the center, a catalyst layer 2 located on the left and right sides of the graphite column, and an insulating deposition sheet 3 located outside each catalyst layer, the surface of the insulating deposition sheet is pre-embedded with seed crystals to guide the conversion diamond deposition, the insulating deposition sheet, the catalyst layer, and the flaky graphite column are of the same height and are covered by a horizontally arranged insulating shielding tube 4 on the outside; the heat-insulating conductive component comprises a conductive carbon sheet 5, a graphite tube 6 , a heating resistor 7 and a magnesium oxide ring 8, the left and right ends of the insulating shielding tube are blocked by conductive carbon sheets and the periphery is covered by a horizontally arranged graphite tube, the periphery of the conductive carbon sheet is surrounded by a vertically arranged annular heating resistor, the heating resistor is located in the center of the conductive carbon sheet and is lower than the heating resistor, and a magnesium oxide ring is provided at the upper and lower ends of the heating resistor; the thermal insulation conductive component also includes a cylindrical metal chromium sheet 8 vertically arranged and sleeved on the internal synthetic body, the chromium sheet has a thickness of 1-2mm, is resistant to high temperature and corrosion, and can protect the new steel ring from resistance fluctuations and shutdown during the production of cultivated diamonds, and also includes a cylindrical metal chromium sheet sleeved on the cylindrical metal chromium The conductive steel ring 9 outside the sheet is filled with magnesium oxide. The catalyst layer is an alloy catalyst made of iron, cobalt, nickel, titanium and copper composite materials smelted at high temperature. The alloy catalyst uses iron, cobalt, nickel, titanium and copper composite materials as catalysts, with iron, cobalt and nickel accounting for 99-98% and titanium and copper accounting for 1-2%; the insulating shielding tube is made of a mixture of magnesium oxide and cesium chloride through granulation, pressing and sintering; the height of the conductive steel ring and the cylindrical metal chromium sheet is the same as the outer diameter of the graphite tube; compared with the traditional upper and lower heating structure, the temperature gradient generated by lateral heating can be transmitted to both ends, so that the graphite column placed in the center is driven by the temperature gradient to Two insulating sheets embedded with seed crystals are placed at both ends to deposit diamonds. The seed crystals are in the low-temperature areas at both ends, and the catalyst graphite column is in the high-temperature area in the center. The temperature gradient generated by lateral heating better promotes the conversion and deposition of carbon atoms in the center to diamonds at both ends. The two catalysts are placed at both ends of the graphite column, and the width of the catalysts at both ends can be flexibly changed to adjust the growth space of the growing diamonds (that is, the growth time, which affects the particle size of the cultivated diamonds). The graphite column can be customized in width according to the growth time of the diamonds, and the size of the heating resistor can be adjusted without affecting the substantial changes in the overall structural blocks.The resistance sheet is mixed and pressed by graphite and ceramic powder, and the heat generation can be adjusted to control the lateral temperature difference, which is used to control the deposition rate of diamond at each end of the building block; the composite pyrophyllite includes a pyrophyllite sheet 10, a dolomite sheet 11 and a magnesium oxide sheet 12 arranged in sequence from top to bottom, the outer diameters of the dolomite sheet and the magnesium oxide sheet are the same as those of the magnesium oxide ring, and a circular groove for placing the dolomite sheet and the magnesium oxide sheet is provided in the center of the pyrophyllite sheet. The outer diameter of the pyrophyllite sheet is the same as that of the conductive steel ring. The composite pyrophyllite includes an inner bushing magnesium oxide layer, a middle bushing dolomite layer, and an outer pyrophyllite. Compared with traditional pyrophyllite, it has better thermal insulation, pressure transmission and stability.

[0013] The structural block of the present invention uses a set of composite pyrophyllite blocks, two conductive steel rings, two metal chromium sheets, two magnesium oxide rings, two heating resistance sheets, two conductive carbon sheets, one graphite tube, one shielding tube, two alloy catalysts, one natural flaky graphite column, and two insulating deposition sheets, a total of 18 accessories (11 types). By adjusting the thickness of the graphite column and the alloy catalyst, high-grade diamond cakes of different particle sizes can be grown. After assembly, the synthetic block is placed on a domestic six-sided top press φ800 cylinder press, the top hammer has a hammer face of 62*62mm, the pressure is set to 75-78Mpa, the power is 6.2-6.5 kilowatts, and after 48-144 hours, double-sided diamond cakes of different particle sizes can be deposited.

Claims

1. A double-sided diamond deposition structure sharing a graphite column, characterized in that: It includes an internal synthesis body and a composite pyrophyllite outer cavity located at the upper and lower parts of the internal synthesis body, and a thermal insulation conductive heating component located on the left and right sides thereof; the internal synthesis body includes a flaky graphite column vertically arranged in the center, a catalyst layer located on the left and right sides of the graphite column, and an insulating deposition sheet located on the outside of each catalyst layer, seed crystals are embedded on the surface of the insulating deposition sheet, and the insulating deposition sheet, the catalyst layer, and the flaky graphite column have the same height and are covered by a horizontally arranged insulating shielding tube on the outside; the thermal insulation conductive component includes a conductive carbon sheet, a graphite tube, a heating resistor sheet and a magnesium oxide ring, the left and right ends of the insulating shielding tube are blocked by conductive carbon sheets and the outer periphery is covered by a horizontally arranged graphite tube, the outer periphery of the conductive carbon sheet is surrounded by a vertically arranged annular heating resistor sheet, the heating resistor sheet is located in the center of the conductive carbon sheet and is lower than the heating resistor sheet, and a magnesium oxide ring is provided at the upper and lower ends of the heating resistor sheet.

2. The double-sided diamond deposition structure of a common graphite column as claimed in claim 1, characterized in that: The thermal insulation and conductive assembly also includes a vertically arranged cylindrical metal chromium sheet sleeved on the internal synthetic body and a conductive steel ring sleeved outside the cylindrical metal chromium sheet. The heights of the conductive steel ring and the cylindrical metal chromium sheet are the same as the outer diameter of the graphite tube.

3. The double-sided diamond deposition structure of a common graphite column as claimed in claim 2, characterized in that: The composite pyrophyllite comprises pyrophyllite sheets, dolomite sheets and magnesium oxide sheets arranged in sequence from top to bottom. The outer diameters of the dolomite sheets and magnesium oxide sheets are the same as those of the magnesium oxide rings. A circular groove is provided in the center of the pyrophyllite sheet for placing the dolomite sheets and magnesium oxide sheets. The outer diameter of the pyrophyllite sheet is the same as that of the conductive steel ring.

4. The double-sided diamond deposition structure of a common graphite column as claimed in claim 3, characterized in that: The conductive steel ring is filled with magnesium oxide, the catalyst layer is an alloy catalyst made of iron, cobalt, nickel, titanium and copper composite materials smelted at high temperature, and the insulating shielding tube is made of a mixture of magnesium oxide and cesium chloride through granulation, pressing and sintering.

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