Method for manufacturing cubic diamond nanocrystals

摘要

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.

主权项

1. A method for manufacturing cubic diamond nanocrystals comprising the following successive steps:
(a) providing crystalline diamond powder where the maximum particle size of the diamond powder is equal or more than 2 μm and equal or less than 1 mm and where the particles of the diamond powder have a cubo-octahedral shape; (b) milling said crystalline micron diamond powder using nitrogen jet milling micronization so as to manufacture a fine powder where the maximum particle size of the said fine powder is less than 2 μm; (c) nanomilling the fine powder of step b) using a planetary tungsten carbide ball mill so as to manufacture a nanomilled powder comprising particles which maximum size is equal or less to 100 nm; (d) acid treating the nanomilled powder of step c) so as to dissolve possible tungsten carbide particles that may have been produced in step c); (e) extracting the cubic diamond nanocrystals by centrifugation, wherein the cubic diamond nanocrystals have a rounded shape.