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Method for manufacturing cubic diamond nanocrystals

A technology of cubic nano and nano crystals, applied in the field of preparing diamond cubic nano crystals, which can solve the problems of uneven shape of nano diamonds and poor reliability of production methods

Inactive Publication Date: 2015-01-28
INST NAT DE LA SANTE & DE LA RECHERCHE MEDICALE (INSERM) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The main obstacles to the practical use of known nanodiamonds, such as detonation nanodiamonds, are the poor reliability of the production method and the inhomogeneous shape of the nanodiamonds

Method used

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  • Method for manufacturing cubic diamond nanocrystals
  • Method for manufacturing cubic diamond nanocrystals
  • Method for manufacturing cubic diamond nanocrystals

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Experimental program
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Embodiment Construction

[0048] According to an embodiment of the method of the invention, diamond cubic nanocrystals are obtained as follows:

[0049] - The starting material is highly crystalline synthetic micro-diamond powder (trade name "Element Six PDA999 80-100") comprising massive, very uniform cubo-octahedral shaped diamond crystals of 80-100 mesh (187-150 μm) , with extremely high hardness, thermal stability and impact strength;

[0050] - For the conversion of these micro-diamonds into smaller particles, the self-micronization method of nitrogen jet milling is used, and is superior to planetary mills with stainless steel beads, which are heavily polluted by iron compounds;

[0051] - at a nitrogen flow rate of 60m 3 A 250 g sample of the starting raw material was first micronized to a fine pure powder over a period of 2 h in a 100AFG fluidized bed opposed jet mill (marketed by Hosokawa-Alpine, Germany) with high grinding pressure (8 bar). After this step, a fine pure gray powder is obtaine...

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Abstract

A method for manufacturing cubic diamond nanocrystals (10) comprising the following successive steps: (a) providing crystalline diamond powder where the maximum particle size of the powder is equal or more than 2 um and equal or less than 1 mm; (b) milling said crystalline micron diamond powder using nitrogen jet milling micronization so as to manufacture a fine powder; (c) nanomilling the fine powder of step b) using a planetary tungsten carbide ball mill; (d) acid treating the nanomilled powder of step c); (e) extracting the cubic diamond nanocrystals (10) by centrifugation. Advantageously round-shaped cubic diamond nanocrystals are manufactured.

Description

technical field [0001] The invention relates to a method for preparing diamond cubic nanocrystals. The invention also relates to diamond cubic nanocrystals which can be prepared according to the method of the invention. Background technique [0002] Nanodiamonds are ultra-small highly crystalline c-diamonds. The size of the nanodiamonds is generally equal to or less than 100 nm, and may be equal to or less than about 10 nm, such as about 5 nm. [0003] Due to the intrinsic fluorescence associated with optically active defects, nanodiamonds have recently attracted increasing attention for applications in physics, chemistry, and biology. [0004] Depending on the implementation, they can be used as follows: [0005] - Individual diamond color centers are used in physics as single-photon sources for quantum computing and quantum cryptography, and NV (nitrogen vacancy)-doped nanodiamonds can also be used as magnetic field sensors, enabling novel nanoscale imaging Atomic (sub...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/06C09K11/00C01B32/384
CPCB01J2/00Y10T428/2991C01B31/065C01B31/14C01B31/06C01B31/083B82Y40/00Y10S977/773B82Y30/00C01B32/15C01B32/28C01B32/384Y10T428/2982Y10T436/143333Y10S977/775C01B32/26C01P2004/64G01N33/582
Inventor 帕特里克·屈尔米让-保罗·布杜阿兰·托雷尔费尔多·热勒佐科莫汉姆德·塞努尔
Owner INST NAT DE LA SANTE & DE LA RECHERCHE MEDICALE (INSERM)