发明名称 |
High pressure and high temperature production of diamonds |
摘要 |
The present invention is directed to a method for treating discolored natural diamond, especially Type IIa diamond and Type IaA/B diamond with nitrogen as predominantly B centers, for improving its color. The method includes preblocking and preshaping a discolored natural diamond to prevent its breakage in a high pressure/high temperature (HP/HT) press, placing said discolored natural diamond in a pressure transmitting medium which is consolidated into a pill. Next, the pill is placed into a HP/HT press at elevated pressure and elevated temperature within the graphite-stable or diamond-stable range of the carbon phase diagram for a time sufficient to improve the color of said diamond. Finally, the diamond is recovered from said press. Colorless and fancy colored diamonds can be made by this method.
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申请公布号 |
US7241434(B2) |
申请公布日期 |
2007.07.10 |
申请号 |
US20030344249 |
申请日期 |
2003.03.28 |
申请人 |
BELLATAIRE INTERNATIONAL, LLC |
发明人 |
ANTHONY THOMAS R.;KADIOGLU YAVUZ;VAGARALI SURESH S.;WEBB STEVEN W.;JACKSON WILLIAM E.;BANHOLZER WILLIAM F.;CASEY JOHN K.;SMITH ALAN C. |
分类号 |
C01B31/06;B01J3/06;B24B1/00;B24B19/16;B30B11/00 |
主分类号 |
C01B31/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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