A synthetic diamond or cubic boron nitride particle is characterised by containing two or more stable isotopes of an element present in a ratio which is different to the ratio in which the isotopes exist in nature. The diamond or cubic boron nitride particle thus has a fingerprint. A preferred example of the element is nitrogen.
申请公布号
DE69220320(T2)
申请公布日期
1998.01.15
申请号
DE1992620320T
申请日期
1992.10.13
申请人
DE BEERS INDUSTRIAL DIAMOND DIVISION (PROPRIETARY) LTD., JOHANNESBURG, TRANSVAAL, ZA
发明人
DYER, HENRY BROOKE, BRYANSTON, SANDTON, TRANSVAAL, ZA;DAVIES, GEOFFREY JOHN, RANDBURG, TRANSVAAL, ZA;BURNS, ROBERT CHARLES, NORTHCLIFF, TRANSVAAL, ZA
