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Title: PROCESS FOR COLORING DIAMONDS

Abstract

A process is given for coloring substantially colorless diamonds in the blue to blue-green range and comprises the steps of irradiating the colorless diamonds with electrons having an energy within the range 0.5 to 2 Mev to obtain an integrated electron flux of between 1 and 2 x 10/sup 18/ thc diamonds may be irradiated 1 hr when they take on a blue color with a slight green tint: After being heated at about 500 deg C for half an hour they become pure blue. Electrons within this energy range contam sufficient energy to displace the diamond atoms from their normal lattice sites into interstitial sites, thereby causing the color changes.

Inventors:
Issue Date:
Research Org.:
Originating Research Org. not identified
OSTI Identifier:
4131519
Patent Number(s):
2945793
Assignee:
U.S. Atomic Energy Commission
Patent Classifications (CPCs):
A - HUMAN NECESSITIES A44 - HABERDASHERY A44C - JEWELLERY
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY
NSA Number:
NSA-14-026023
Resource Type:
Patent
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-60
Country of Publication:
United States
Language:
English
Subject:
METALS, CERAMICS, AND OTHER MATERIALS; ATOMS; COLOR; CRYSTALS; DEFECTS; DIAMONDS; ELECTRONS; HEATING; INTERSTITIALS; IRRADIATION; LATTICES; RADIATION EFFECTS

Citation Formats

Dugdale, R A. PROCESS FOR COLORING DIAMONDS. United States: N. p., 1960. Web.
Dugdale, R A. PROCESS FOR COLORING DIAMONDS. United States.
Dugdale, R A. Tue . "PROCESS FOR COLORING DIAMONDS". United States.
@article{osti_4131519,
title = {PROCESS FOR COLORING DIAMONDS},
author = {Dugdale, R A},
abstractNote = {A process is given for coloring substantially colorless diamonds in the blue to blue-green range and comprises the steps of irradiating the colorless diamonds with electrons having an energy within the range 0.5 to 2 Mev to obtain an integrated electron flux of between 1 and 2 x 10/sup 18/ thc diamonds may be irradiated 1 hr when they take on a blue color with a slight green tint: After being heated at about 500 deg C for half an hour they become pure blue. Electrons within this energy range contam sufficient energy to displace the diamond atoms from their normal lattice sites into interstitial sites, thereby causing the color changes.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1960},
month = {7}
}

Patent:
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