General
- Diamond is the
hardest natural material. The Mohs hardness scale, on which diamond is
a corundum (sapphire) is adequately attest to
this incredible hardness, as diamond is exponentially harder than
corundum.
- Synthetic
industrial diamonds are produced the process of High Pressure High
Temperature Synthesis (HPHT). In HPHT synthesis, graphite and a
metallic catalyst are placed in a hydraulic press under high
temperatures and pressures.
- Man made diamond’
is also known as synthetic diamond and this ‘man made diamond’ or the
‘lab created diamond’ undergoes a chemical and physical process in the
diamond mines. The main difference between ‘Man made diamond’ and the
natural diamond is the composition of three dimensional carbon
crystals.
Process
- The mixture of
products contains relatively large grains of diamond. Electron
microscopy reveals well-crystallized mini-diamonds with diameters
reaching up to 0.5 mm. The diamond yield depends strongly on the exact
reaction conditions. Under 500 °C, only graphite is produced. Under
optimal conditions, a diamond yield of 6.6 % is obtained
- The process o
synthesis and sinterization of industrial diamonds is performed under
high pressure and temperatures (HPHT) up to 8,0GPa and 1800ºC in high pressure apparatus (HPA) capable of sustaining
these values for determined periods of time using special hydraulic
clasps.
Technology
- Diamonds that are
not sold as fine gems have been used in various industrial
applications for years - including machining tools and abrasives. At
Pure Spin TM Golf, we have developed a breakthrough technology for
integrating "industrial diamonds" in golf club design.
- All VFT models work
with the highly precise fast tool technology – an innovative single
point turning process utilizing PCD or diamond tools. The fast-tool
technology produces ready-to polish lenses for all organic materials –
toric, spheric, free-form, convex or concave surfaces with highest
surface quality and form accuracy.
Market
- World demand for
diamond is strong. The annual US$0.7 billion market for industrial
diamond is now almost exclusively supplied by synthetic production of
about 1000 million carats; 1 carat (ct) = 0.2 grams. Gem quality
synthetics remain inferior and expensive to produce, so the diamond
jewelry trade is supplied by mining natural diamond, derived from
kimberlites, lamproites, and placer deposits.
- The import of
rough diamonds is prohibited unless the goods are imported in a tamper
resistant container from a country which is a participant in the
Kimberley Process and the shipment is accompanied by a valid Kimberley
Process Certificate (KPC).
Application
-
Industrial use of CVD diamond
has been economics; the coatings were simply too expensive compared
with existing alternatives. Lowering the cost of CVD diamond coating
will make the use of CVD diamond much more economically and finally
allow engineers the opportunity to exploit the large array of
outstanding diamond’s properties in a wide variety of industrial and
scientific applications.
-
The company plans to
manufacture this material at its industrial diamond production
facility in South Africa. ScD has already proven its use in a broad
range of applications such as a thermal management substrate for the
higher powered silicon-based electronic devices such as processors
used in network servers and industrial PCs. The diamond composite is
also extremely wear-resistant and the manufacturing technology lends
itself to making complex three dimensional shapes. The inert nature
of silicon carbide and the biocompatibility of diamond may lend itself
to medical implant applications.
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