Affiliation:
1. KINIK Company
2. National Taiwan University
Abstract
Diamond grits synthesized under ultrahigh pressure have been commercially
manufactured since 1957. Most of the diamond grits are for sawing rocks (granite, marble) and
concrete. In 2004, more than 4 billion carats (800 tons) of diamond saw grits were produced
worldwide. About 3/4 of total production was made in China, but the Chinese diamond grits tend
to be smaller in size (<40 mesh) and with inferior quality, so their total value accounts for only 1/4
of the world sales (about $600 millions).
The ultrahigh pressure process for synthesizing diamond grits is due to make a quantum leap:
the raw materials will incorporate diamond seeds with a predetermined pattern. The result is
doubling the diamond yield with a narrower size distribution. Moreover, the shape of diamond
crystals can be precisely tuned. For example, diamond octahedra or diamond cubes, that are not
available today, can be mass-produced. The new technology is now being implemented
worldwide so the future diamond grits will have improved quality at reduced prices.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Reference13 articles.
1. Chien-Min Sung, A Century of Progress in the Development of Very High Pressure Apparatus for Scientific Research and Diamond Synthesis, High Temperatures-High Pressures, Vol. 29, pp.253-293. (1997).
2. Chien-Min Sung, Optimized Cell Design for High-Pressure Synthesis of Diamond, High Temperatures-High Pressures, Vol. 33, pp.489-501. (2001).
3. Chien-Min Sung, U.S. Patent 6, 286, 498. (2001).
4. Chien-Min Sung, Superabrasives and Diamond Synthesis, 600 pages book. (2003).
5. Chien-Min Sung, Diamond Films and Diamond-Like Carbon, 600 pages book. (2003).
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