Graphite-catalyst charge assembly for the preparation of diamond

Claim 1

IN A GRAPHITE-CATALAYST CHARGE ELEMENT ARRAGEMENT FOR INSERTION IN HIGH PRESSURE APPARATUS FOR THE CONVERSION OF GRAPHITE TO DIAMOND BY APPLICATION THERETO OF HIGH PRESSURES AND HIGH TEMPERATURES ABOVE THE GRAPHITE-TODIAMOND EQUILIBRIUM LINE ON THE PHASE DIAGRAM OF CARBON WHEREIN SPECTROSCOPICALLY PURE GRAPHITE IS PARITALLY ENCLOSED IN AN OUTER THIN LAYER OF CATALYST METAL CHOSEN FROM THE GROUP CONSISTING OF ONE OF THE METALS OF GROUP VIII OF THE PERIODIC TABLE OF ELEMENTS, CHROMIUM, MANGANESE AND TANTALUM, AND A HARD CRYSTALLINE INCLUSION IS ENCLOSED WITHIN THE GRAPHITE, THE IMPROVEMENT WHICH COMPRISES: (A) THE CRYSTALLINE INCLUSION IN THE GRAPHITE BEING LOCATED OFFSET FROM THE CENTRAL AXIS OF THE CATLYST METAL ENCLOSURE AND SPACED BETWEEN ABOUT 50 AND ABOUT 100 MILS DISTANT FROM THE INNER SURFACE OF THE OUTER CATALYST METAL LAYER AT ITS CLOSEST POINT (1) SAID CRYSTALLINE INCLUSION BEING SELECTED FROM THE CLASS CONSISTING OF DIAMOND, CUBIC BORON NITRIDE, BORON CARBIDE, ZIRCONIA, THORIA, STISHOVITE SILICON DIOXIDE, COESITE SILICON DIOXIDE AND SAPPHIRE AND (B) A QUANTITY OF CATALYST METAL FROM THE ABOVERECITED GROUP BEING LOCATED ENTIRELY WITHIN SAID GRAPHITE, (1) SAID QUANTITY OF METAL BEING IN A VOLUMETRIC RATIO OF BETWEEN 1:10 AND 6:1 TO THE VOLUME OF CRYSTALLINE INCLUSION PRESENT AND BEING LOCALIZED ABOUT SAID CRYSTALINE ON AT LEAST TWO SIDES THEREOF HAVING GRAPHITE DISPOSED BETWEEN SAID QUANTITY OF CATALYST METAL AND SAID CATALYST METAL LAYER.