Unique chemical properties of ultradiamond particles

Measurements of the unique chemical properties of ultradiamond particles

Particle zones

Chemical composition of typical particle, weight %

Zone	ultradiamond50	ultradiamond90
Diamond (center)	50 %	90 % or more *
Graphite (middle)	20 %	10 % or less
Porous carbon (outer)	30 %
		* more than 90 % available on a custom basis

Relative sizes (approximate) of particle zones
drawing of zones in ultradiamond particles

(Pores in carbon not shown)

Chemical groups on porous surface of
ultradiamond50

The porous surface
includes a wide spectrum of functional chemical groups with directly linked carbon structures. This opens up great possibilities for chemical reactions on the surface.

Functional groups
Methyl, nitrile, hydroxy, oxycarboxylic (10 - 20 number %).

Carbon structures
Carbon atoms with non-compensated links (1 - 2 number %).

Temperature stability

ultradiamond50
can be heated up to 550 - 600 K (277 - 327 deg. C) before oxidation in air occurs.

ultradiamond90
can be heated up to 700 - 750 K (427 - 477 deg. C) before oxidation in air occurs. It can be heated up to 1,300 K (1,027 deg. C) in an inert gas, before graphitization occurs.