With the advancement of technology, the domestic abrasive grade diamond production capacity has increased exponentially in recent years, but the market demand for diamond has increased linearly, and the growth rate is obviously lower than the growth of production capacity. This supply and demand pattern will inevitably have a profound impact on the profitability of the diamond industry. 
Two yellow large single crystal diamonds, weight and size are 7.56 carats, 9.0*9.5*5.0 mm 3 ; 5.30 carats, 8.5*8.0*4.5 mm 3 
Colorless transparent large single crystal diamond after cutting, weighing 0.2-0.6 carats, color E grade, clarity VS2 
The yellow diamond after processing, the largest one weighs 0.9 carats. According to the diamond division's rating, the crystal clarity reaches VVS1, and the color LY diamond industry must find a new direction for development. CVD diamond films, large single crystal diamonds, and polycrystalline diamonds represent this direction of development. Large single crystal diamond turning tools combined with high-precision lathes have achieved mirror processing with a minimum surface roughness of Ra0.02 μm. Single crystal diamond turning tools play an important role in precision or ultra-precision machining, and are widely used to process nuclear reactors and precision. Ultra-precision mirror parts such as mirrors for optical instruments, computer hard disks, navigation gyros and accelerator electron guns for missiles or spacecraft, can also be used for processing daily office or daily necessities such as copier rollers, contact lenses, large single crystal diamond scalpels, Precision surgery in the eyes and brain. Diamond has high electron and hole mobility, high breakdown voltage, high thermal conductivity, and can be semiconductorized. It is a promising high temperature semiconductor material in the 21st century. On December 24, 2011, the Provincial Science and Technology Department organized the Project Experts Acceptance Committee to conduct on-site acceptance of the “1–10 mm Large Single Crystal Diamond Synthesis†(No.) of the Henan Provincial Outstanding Talent Fund Project implemented by the Yellow River Cyclone. The acceptance committee heard the report of the project undertaker Dr. Wang Yuchang on the implementation of the project, visited the experimental site, reviewed the project acceptance materials, and questioned the technical issues. The participating experts agreed that the project has completed the use of seven key technologies, including precision measurement and control of temperature and pressure, material and structural design techniques of high-stability and high-precision synthetic cavities, and component design and preparation of catalysts. As a pressure-transmitting/insulating medium, the metal oxide mixed powder was classified according to the resistance value, four kinds of catalysts were developed, and seven innovations such as adjustment of the color tone and saturation of the diamond were changed by the catalyst component, and the synthesis was successfully synthesized. 1-2 mm yellow single crystal, yellow large single crystal diamond with side length up to 10 mm (weight 6.03 carats) and 6 mm blue and colorless large single crystal diamond were synthesized, and 9 patents were granted (one invention, There are 8 utility models), 23 talented science and technology personnel, 3 project technology industrialization promotion, and indirect sales income of 1.068 billion yuan. At present, there is no authoritative organization in China to propose relevant quality standards and testing methods. In the future, it is necessary to continue to contact with relevant international organizations to complete the formulation of artificial large single crystal rating standards, and continue to improve project-related production technologies and solve problems in project industrialization. Localization of some raw materials. Through the unremitting efforts of the research team, the objectives and tasks of the plan application commitment have been achieved, and the comprehensive technical level has reached the international advanced level. The expert committee agreed that the project of "1-10 mm large single crystal diamond synthesis" agreed to pass the acceptance test.
Two yellow large single crystal diamonds, weight and size are 7.56 carats, 9.0*9.5*5.0 mm 3 ; 5.30 carats, 8.5*8.0*4.5 mm 3 Colorless transparent large single crystal diamond after cutting, weighing 0.2-0.6 carats, color E grade, clarity VS2 The yellow diamond after processing, the largest one weighs 0.9 carats. According to the diamond division's rating, the crystal clarity reaches VVS1, and the color LY diamond industry must find a new direction for development. CVD diamond films, large single crystal diamonds, and polycrystalline diamonds represent this direction of development. Large single crystal diamond turning tools combined with high-precision lathes have achieved mirror processing with a minimum surface roughness of Ra0.02 μm. Single crystal diamond turning tools play an important role in precision or ultra-precision machining, and are widely used to process nuclear reactors and precision. Ultra-precision mirror parts such as mirrors for optical instruments, computer hard disks, navigation gyros and accelerator electron guns for missiles or spacecraft, can also be used for processing daily office or daily necessities such as copier rollers, contact lenses, large single crystal diamond scalpels, Precision surgery in the eyes and brain. Diamond has high electron and hole mobility, high breakdown voltage, high thermal conductivity, and can be semiconductorized. It is a promising high temperature semiconductor material in the 21st century. On December 24, 2011, the Provincial Science and Technology Department organized the Project Experts Acceptance Committee to conduct on-site acceptance of the “1–10 mm Large Single Crystal Diamond Synthesis†(No.) of the Henan Provincial Outstanding Talent Fund Project implemented by the Yellow River Cyclone. The acceptance committee heard the report of the project undertaker Dr. Wang Yuchang on the implementation of the project, visited the experimental site, reviewed the project acceptance materials, and questioned the technical issues. The participating experts agreed that the project has completed the use of seven key technologies, including precision measurement and control of temperature and pressure, material and structural design techniques of high-stability and high-precision synthetic cavities, and component design and preparation of catalysts. As a pressure-transmitting/insulating medium, the metal oxide mixed powder was classified according to the resistance value, four kinds of catalysts were developed, and seven innovations such as adjustment of the color tone and saturation of the diamond were changed by the catalyst component, and the synthesis was successfully synthesized. 1-2 mm yellow single crystal, yellow large single crystal diamond with side length up to 10 mm (weight 6.03 carats) and 6 mm blue and colorless large single crystal diamond were synthesized, and 9 patents were granted (one invention, There are 8 utility models), 23 talented science and technology personnel, 3 project technology industrialization promotion, and indirect sales income of 1.068 billion yuan. At present, there is no authoritative organization in China to propose relevant quality standards and testing methods. In the future, it is necessary to continue to contact with relevant international organizations to complete the formulation of artificial large single crystal rating standards, and continue to improve project-related production technologies and solve problems in project industrialization. Localization of some raw materials. Through the unremitting efforts of the research team, the objectives and tasks of the plan application commitment have been achieved, and the comprehensive technical level has reached the international advanced level. The expert committee agreed that the project of "1-10 mm large single crystal diamond synthesis" agreed to pass the acceptance test.Stainless Steel Wine Rack/holder
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