LUMINESCENT DIAMOND AND METHOD OF MAKING THE SAME

Luminescent diamond is made subjecting a volume of diamond grains and catalyst material to high-pressure/high-temperature (HPHT) conditions. A pressure apparatus and/or a pressure cell is specially configured to impose a differential or asymmetric pressure onto the diamond volume during the HPHT con...

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Bibliographic Details
Main Authors BELNAP, J, BAO, Yahua
Format Patent
LanguageEnglish
Published 27.06.2024
Subjects
ADHESIVES
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
CHEMISTRY
COMPOUNDS THEREOF
DYES
INORGANIC CHEMISTRY
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
NON-METALLIC ELEMENTS
PAINTS
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
POLISHES
THEIR RELEVANT APPARATUS
TRANSPORTING
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Summary:Luminescent diamond is made subjecting a volume of diamond grains and catalyst material to high-pressure/high-temperature (HPHT) conditions. A pressure apparatus and/or a pressure cell is specially configured to impose a differential or asymmetric pressure onto the diamond volume during the HPHT conditions. This subjects the diamond grains to differential strain that increases the degree of plastic deformation of the diamond grains to increase the formation of nitrogen vacancy centers. Diamond pellets formed by such process and subjected to differential pressure can have an aspect ratio, or an aspect ratio change, of greater than one. The temperature of the HPHT process is 1,800°C or less to facilitate desired nitrogen migration to preferentially promote formation of NV centers over NVN and N3 centers in the diamond pellets to provide a degree of luminescence in a red wavelength spectrum greater than diamond pellets formed by some other HPHT processes.
Bibliography:Application Number: AU20220407038