CVD Micron Diamond Powders

T. Zhang; F.H. Sun; Bin Shen; Z.M. Zhang

doi:10.4028/www.scientific.net/AMR.797.495

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 797CVD Micron Diamond Powders

CVD Micron Diamond Powders

Abstract:

The conventional diamond powders (< 10 μm) are generally produced from crushing the large-sized diamonds synthesized by high-pressure and high-temperature (HPHT) technique, whereas they have many morphological imperfections. In the present work, the hot filament chemical vapour deposition (HFCVD) technique is employed for synthesizing such diamond powders. A great many of micron diamonds are grown simultaneously but independently onto a large-area substrate. First, the seeds with an appropriate density approximately 1.3×10¹⁰m^-2 are dispersed evenly onto a mirror-polished silicon wafer by using a spin coater machine. Afterwards, the regrowth mechanism of seeds is mainly discussed. The results demonstrate that the unwanted spontaneous and secondary nucleation play a determinant role in keeping well in the morphology of crystals and inhibiting the poly-crystals growth.

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Periodical:

Advanced Materials Research (Volume 797)

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495-499

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.797.495

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Online since:

September 2013

Authors:

T. Zhang, F.H. Sun, Bin Shen, Z.M. Zhang

Keywords:

Diamond Seed, Hot Filament CVD, Micron Diamond

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