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CN-224221286-U - Assembly structure for synthesizing diamond by high-temperature high-pressure method

CN224221286UCN 224221286 UCN224221286 UCN 224221286UCN-224221286-U

Abstract

The utility model discloses an assembly structure for synthesizing diamond by a high-temperature high-pressure method, which relates to the technical field of diamond synthesis and comprises an outer layer structure, a middle layer heating and insulating system, a core reaction layer and a top covering layer which are sequentially arranged from outside to inside, wherein the outer layer structure comprises a pyrophyllite composite block, a pyrophyllite ring encircling the outer side of the pyrophyllite composite block and a conductive steel cap fixed at the top, the middle layer heating and insulating system comprises a heating sleeve embedded into the pyrophyllite composite block, a heating sheet is arranged in the heating sleeve, a magnesia insulating sleeve is wrapped in the heating sleeve, a zirconia thick column which is vertically supported is arranged below the heating sleeve, the core reaction layer comprises a magnesia crystal bed, a carbon source is placed on the magnesia crystal bed, alloy is distributed around the carbon source, and the top covering layer comprises zirconia Bao Zhu covered above the core reaction layer. Solves the problems of the prior art that the seeds with a large amount of carbon grow fast, but have weak impurity removing capability and poor quality, and the seeds with a small amount of carbon have better quality, small size and low economic benefit.

Inventors

  • WANG CHUN
  • HONG YOUREN
  • WANG WENXIANG
  • SHEN RUSONG
  • LI CHENGCHUN

Assignees

  • 安徽宏晶新材料股份有限公司

Dates

Publication Date
20260512
Application Date
20250402

Claims (7)

  1. 1. The assembly structure for synthesizing the diamond by the high-temperature high-pressure method is characterized by comprising an outer layer structure, a middle layer heating and insulating system, a core reaction layer and a top covering layer which are sequentially arranged from outside to inside, wherein the outer layer structure comprises a pyrophyllite composite block (1), a pyrophyllite ring (2) encircling the outer side of the pyrophyllite composite block (1) and a conductive steel cap (3) fixed on the top, the middle layer heating and insulating system comprises a heating sleeve (5) embedded into the pyrophyllite composite block (1), a heating sheet (4) is arranged in the heating sleeve (5), the heating sleeve (5) is externally wrapped with a magnesium oxide insulating sleeve (6), a zirconium oxide thick column (7) which is vertically supported is arranged below the heating sleeve (5), the core reaction layer comprises a magnesium oxide crystal bed (10), a carbon source (8) is placed on the magnesium oxide crystal bed (10), an alloy (9) is distributed around the carbon source (8), and the top covering layer comprises zirconium oxide Bao Zhu (11) covering above the core reaction layer.
  2. 2. The assembly structure for synthesizing diamond by a high-temperature high-pressure method according to claim 1, wherein the alloy (9) is six equal-size fan-shaped iron-nickel alloy blocks, and a gap of 1.0mm is reserved between every two adjacent blocks.
  3. 3. The assembly structure for synthesizing diamond by high temperature and high pressure method according to claim 1, wherein six equal-divided seed positioning holes are arranged on the surface of the magnesia crystal bed (10), the aperture is slightly smaller than the diameter of the seeds, and the depth is consistent with the height of the seeds.
  4. 4. The assembly structure for synthesizing diamond by a high-temperature high-pressure method according to claim 1, wherein the carbon source (8) is six fan-shaped high-purity graphite sheets which are in one-to-one correspondence with the alloy blocks.
  5. 5. The assembly structure for synthesizing diamond by high temperature and high pressure method according to claim 1, wherein the pyrophyllite composite block (1) and the pyrophyllite ring (2) are tightly attached through a high temperature adhesive to form a sealed cavity.
  6. 6. The assembly structure for synthesizing diamond by high temperature and high pressure method according to claim 1, wherein the conductive steel cap (3) is made of copper alloy, is electrically connected with the heating sleeve (5) and is used for transmitting current to the heating plate (4).
  7. 7. The assembly structure for synthesizing diamond by a high-temperature high-pressure method according to claim 1, wherein the thickness of the magnesium oxide insulating sleeve (6) is 3-5mm, and the inner wall of the magnesium oxide insulating sleeve is in clearance fit with the outer wall of the heating sleeve (5) to form a heat insulation layer.

Description

Assembly structure for synthesizing diamond by high-temperature high-pressure method Technical Field The utility model relates to the technical field of diamond synthesis, in particular to an assembly structure for synthesizing diamond by a high-temperature high-pressure method. Background Conventional diamond synthesis, in which a plurality of seeds are distributed in the same synthesis block to simultaneously grow a plurality of diamonds, the difference is caused by different heating values of the heating body and different distances between the seeds and the heating body due to the difference of temperature uniformity in the synthesis cavity, so that the difference is difficult to eliminate, the carbon amount obtained by each seed in the same cavity is different, the sizes of the grown diamonds are different, and the quality difference is also larger. The obtained carbon has the advantages of faster growth, reduced impurity removal capability, poor quality, less carbon, smaller size and poor economic benefit, and does not meet the primary faith of a producer, and the defects of crystals are increased and the purity of diamond is reduced due to uneven distribution of the carbon. The prior art has difficulty in thoroughly solving the above problems, and thus there is a need for an assembly structure for synthesizing diamond by a high temperature and high pressure method, which can ensure independent growth of a plurality of seeds and uniform distribution of carbon amount. Disclosure of utility model The utility model aims to provide an assembly structure for synthesizing diamond by a high-temperature high-pressure method, which solves the problems of the prior art that the obtained carbon amount is large, the growth is faster, the impurity removing capability is reduced, the quality is poor, the obtained carbon is less, the quality is available, the size is smaller, the economic benefit is poor, the two are not in line with the initial loyalty of a producer, the crystal defects are increased due to uneven carbon amount distribution, and the purity of the diamond is reduced. The utility model provides an assembled structure for synthesizing diamond by high temperature high pressure method, includes outer layer structure, middle level heating and insulating system, core reaction layer and the top overburden that from outside to interior set gradually, outer layer structure includes pyrophyllite composite block, encircles the pyrophyllite ring in the pyrophyllite composite block outside to and be fixed in the conductive steel cap at top, middle level heating and insulating system is including the inside heating sleeve of embedding pyrophyllite composite block, the intraductal heating plate that is equipped with of heating sleeve, the heating sleeve wraps up magnesia insulating sleeve outward, and is equipped with the thick post of zirconia of vertical support below the heating sleeve, the core reaction layer includes the magnesium oxide crystal bed, places the carbon source on the magnesium oxide crystal bed, distributes around the carbon source has the alloy, the top overburden is including covering the zirconia Bao Zhu in core reaction layer top. Preferably, the thickness of the magnesium oxide separation sheet is 1.0mm, and the height is equal to the total thickness of the alloy and the carbon source. Preferably, the alloy is six equal-size fan-shaped iron-nickel alloy blocks, and a gap of 1.0mm is reserved between adjacent blocks. Preferably, the surface of the magnesium oxide crystal bed is provided with six equal-divided seed positioning holes, the aperture is slightly smaller than the diameter of the seeds, and the depth is consistent with the height of the seeds. Preferably, the carbon source is six fan-shaped high-purity graphite sheets, which are in one-to-one correspondence with the alloy blocks. Preferably, the pyrophyllite composite block and the pyrophyllite ring are tightly attached through a high-temperature adhesive to form a sealed cavity. Preferably, the conductive steel cap is made of copper alloy, is electrically connected with the heating sleeve and is used for transmitting current to the heating plate. Preferably, the thickness of the magnesium oxide insulating sleeve is 3-5mm, and the inner wall of the magnesium oxide insulating sleeve is in clearance fit with the outer wall of the heating sleeve to form a heat insulation layer. The utility model has the advantages that: the assembled structure for synthesizing diamond by high-temperature high-pressure method uses magnesia to completely separate each seed and alloy and carbon source required by growth, and has the advantages that as long as the temperature is within the range required by diamond growth, each seed grows independently, the problem of carbon quantity of each seed is fundamentally solved, the size of diamond in the same synthesized block is ensured to be consistent, and the growth speed of diamond is controlled, thereby pr