Mass Production of Synthetic Diamond

  • Author: Xin Su
  • Published: 09 July 2014
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
  • Source / Publisher: Crystal Growth & Design/ACS Publications
  • Associated Societies: American Chemical Society (ACS), USA
thumbnail image: Mass Production of Synthetic Diamond

Chemical vapor deposition (CVD) is a major method for making synthetic diamonds that are grown from a hydrocarbon gas mixture. Microwave power can be used to assist the growing process by generating active radicals, which, on the other hand, set limits on the growth areas.

Qi Liang and Russell J. Hemley, Carnegie Institution of Washington, Washington D.C., USA, along with colleagues have successfully scaled up high-quality diamond production by introducing a 75 kW, 915 MHz microwave plasma-assisted CVD system. Using ultrapure hydrogen and methane gases, the system can grow single-crystal diamonds at a rate of up to 30 μm/h over a 300 mm diameter deposition area.

With an estimated production rate up to 100 grams per day, the researchers have achieved a major breakthrough in terms of growth area, growth rate and quality control, compared to existing CVD systems. They have also identified a growth-annealing co-process that improved the optical quality of CVD diamond.

Article Views: 3871

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

Bookmark and Share

If you would like to reuse any content, in print or online, from, please contact us first for permission. more

CONNECT: on Facebook on Twitter on YouTube on LinkedIn Sign up for our free newsletter

A product of ChemPubSoc Europe (16 European Chemical Societies)and Wiley-VCH