PROCESS FOR SYNTHESIZING DIAMOND

A process for synthesizing a colorless and transparent diamond crystal which is useful as the material of ornaments and optical parts economically by the temperature difference method, characterized by using at least one metal selected from the group consisting of Fe, Co, Ni, Mn and Cr as the solven...

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Main Authors SUMIYA, H., ITAMI WORKS OF SUMITOMO EL. IND. LTD, SATOH, SH., ITAMI WORKS OF SUMITOMO ELE. IND. LTD, GOUDA, Y., ITAMI WORKS OF SUMITOMO EL. IND. LTD, TSUJI, K. ITAMI WORKS OF SUMITOMO EL. IND. LTD
Format Patent
LanguageEnglish
Published 21.07.1993
Edition5
Subjects
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
THEIR RELEVANT APPARATUS
TRANSPORTING
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Summary:A process for synthesizing a colorless and transparent diamond crystal which is useful as the material of ornaments and optical parts economically by the temperature difference method, characterized by using at least one metal selected from the group consisting of Fe, Co, Ni, Mn and Cr as the solvent for crystal growth, provided that it is necessary to use at least two metals when Fe is used, and using at least one metal selected from the group consisting of Al, Ti, Zr, Hf, V, Nb and Ta as the nitrogen getter for removing nitrogen present in the solvent in an amount of 0.5 to 7 wt% based on the total amount of the solvent, provided that this amount should be 2 wt% or less when Al is used alone.
Bibliography:Application Number: EP19920905002