Diamond Knowledge: Diamond is a symbol of love and an indispensable element in industry. Diamond is one of the top five precious stones, do you know enough about it? Let Honway take you through all aspects of the diamond, from how it is created to how to select it!
In 1994, Thomas R. Anthony et al. of GE filed U.S. Patent 5,437,891 (issued in 1995) stating that the growth rate of cubic facets (100) of polycrystalline diamonds can be increased by chemical vapor deposition (CVD). In particular, if a small amount (e.g., 1%) of air (78% nitrogen, 21% oxygen, 1% argon) is added to …
chemical vapor deposition of diamond monocrystalline Read More »
Natural diamonds are produced at depths of over 130 kilometers. It has a unique cubic crystal structure. Each carbon atom in a diamond is bonded to four other carbon atoms, making it the hardest natural substance known in the world. How are diamonds formed? Let’s find out!
How to make diamonds by chemical vapor deposition? Chemical vapor deposition (CVD) produces pure, high-performance solid materials. A small diamond, which serves as the “core”, is placed in a vacuum environment to remove impurities and injected with high temperature gases – methane and hydrogen – at 3,000 degrees Celsius, which cracks to form electrically charged …
Diamond Synthesis Method – Chemical Vapor Deposition Read More »
Diamond Synthesis Method Diamonds can be synthesized by gas-phase methods (e.g., PVD or CVD), liquid-phase methods (e.g., hydrostatic, catalytic, or CVD liquid-phase methods), or solid-phase methods. The solid-phase method is the synthesis of diamonds in a material with no fluid. The solid carbon atoms cannot diffuse through the fluid to reorganize into the structure of …
Subtlety Comparison Table of Diamond Micro Powder Standards JB/T7990-1979 GB6966-86 JB/T7990-1998 QB/HH1801-04 Corresponding number 0-0.25 W0.5 0-0.05 M0/0.5 0-0.5 W1 0-1 M0/1 0-1 M0.5/1 0.5-1 0.5-1 M0.5/1.5 0.5-1.5 0.5-1.5 M0/2 0-2 W1.5 0-2 M1/2 1-2 0.5-3 12000 W2.5 1.5-3 M1.5/3 1-3 10000 1.5-3 8000 2-3 7000 W3.5 2-4 M2/4 2-4 6000 W5 2.5-5 M2.5/5 2-5 …
Subtlety Comparison Table of Diamond Micro Powder Standards Read More »
Subtlety Comparison Table of Synthetic Diamond with Foreign Standards China ISO FEPA America ANSI B74.16-1971 Japan JIS4130-1988 Germany DIN848-1988 Russia OCT9206-80 grit Size Microstructure Ⅰ Microstructure Ⅱ Size Grit Size grit Size Grit Size Microstructure Size Grit Size 40/45 425/355 426 —- 425/355 D426 425/355 40/50 425/300 40/50 425/300 D426 425/355 630/500 630/500 45/50 355/300 …
Subtlety Comparison Table of Synthetic Diamond with Foreign Standards Read More »
Subtlety Comparison Table of Synthetic Diamond with Foreign Standards China ISO FEPA America ANSI B74.16-1971 Japan JIS4130-1988 Germany DIN848-1988 Russia OCT9206-80 Grit Size Subtlety Ⅰ Subtlety Ⅱ Size Grit Size Grit Size Grit Size Subtlety Size Grit Size 40/45 425/355 426 —- 425/355 D426 425/355 40/50 425/300 40/50 425/300 D426 425/355 630/500 630/500 45/50 355/300 …
Subtlety Comparison Table of Synthetic Diamond with Foreign Standards Read More »
The surface of diamond is generally covered with a layer of hydrophobic C-H bonding, but after the diamond powder has been cleaned and decontaminated with strong acid and alkali for many times, the surface functional groups will be removed during the cleaning process. Diamond is a very stable material and does not react with other …
Introduction to Diamond Dispersion and Surface Modification Methods Read More »
During the manufacturing process, nanodiamonds, like other nanoparticles, can be divided into two types: button up and top down. Nanodiamonds produced by the explosive method are a prime example of the “bottom-up” approach. These nanodiamonds are rounder in appearance compared to diamonds produced by grinding, which tend to have more defined edges. The appearance is …
Nano Diamond Production Methods and Characteristics Instruction Read More »
