Abstract:
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.
Abstract:
본 발명은 다이아몬드의 색상을 개선시키기 위해 변색된 천연 다이아몬드, 특히 IIa형 다이아몬드 및 IaA/B형 다이아몬드를 주로 B 중심을 질소로 처리하는 방법에 관한 것이다. 상기 방법은 고압/고온(HP/HT) 프레스내에서 변색된 천연 다이아몬드가 파쇄되지 않도록 예비블록킹 및 예비형상화시키고, 상기 변색된 천연 다이아몬드를 압력-전송 매질중에 위치시켜 구(pill)로 굳히는 것을 포함한다. 이어서, 상기 필을 다이아몬드의 색상을 개선시키기에 충분한 시간 동안 화강암-안정성 또는 다이아몬드-안정성 범위의 탄소 상 디이어그램내에서 승온 및 승압에서 HP/HT 프레스내에 위치시킨다. 최종적으로, 다이아몬드는 상기 프레스로부터 회수한다. 무색 및 장식 변색 다이아몬드는 상기 방법에 의해 제조될 수 있다.
Abstract:
High-pressure high-temperature presses are commonly employed to create superhard materials used in such fields as road milling, mining and trenching, to breakup tough materials such as asphalt, concrete and rock. Many such presses comprise a plurality of piston assemblies that may act in concert to pressurize a cell. Such a cell may comprise a body with at least three canisters disposed therein, each comprising an axis passing through a center of the body. Such a configuration may allow for maximum planes of symmetry within the cell.
Abstract:
An outer frame of a cubic press and a cubic press with the outer frame. The outer frame encloses a containing room, with the supporting planes for fixedly supporting the rare baffle of the hinged beam cylinders positioned on the inner wall of the four side surfaces, the upper surface and the lower surface of the outer frame, and the windows for installation, disassembly and maintenance of the press set between any two neighboring supporting planes. The outer frame may be in the shape of a cube, a butterfly, a basket, or a sphere. A press formed from six hinged beam piston parts linked by the rib plate or hinge ears and pins is placed inside the containing room enclosed by the outer frame to form the cubic press.
Abstract:
An improved high pressure apparatus (10) can include a plurality of complementary die segments (12, 14). The die segments can have inner surfaces (16) which are shaped to form a die chamber (20) upon assembly of the die segments (12, 14). A pair of anvils (70, 72) can be oriented such that an anvil is at each end of the die chamber (20). To prevent the die segments (12, 14) from being forced apart during movement of the anvils (70, 72), force members can be connected to the die segments (12, 14). The force members (21, 23) can apply discrete forces to the die segments (12, 14) sufficient to retain the die segments in substantially fixed positions relative to each other during application of force by the pair of anvils (70, 72). Using such a high pressure apparatus can achieve pressures as high as 10 GPa with improved useful die life and larger reaction volumes.
Abstract:
A method for producing a semiconductor diamond containing boron by the high pressure synthesis method, wherein a graphite material to be converted to the semiconductor diamond is mixed with boron or a boron compound, formed and fired, in such a way that the resultant graphite material contains a boron component uniformly dispersed therein and has an enhanced bulk density, a high purity and a reduced content of hydrogen.
Abstract:
An electrically conducting n-type ultrananocrystalline diamond (UNCD) having no less than 10 atoms/cm of nitrogen is disclosed. A method of making the n-doped UNCD. A method for predictably controlling the conductivity is also disclosed.
Abstract translation:公开了具有不小于10 19原子/ cm 3的氮的导电n型超微晶金刚石(UNCD)。 制造n掺杂UNCD的方法。 还公开了可预测地控制电导率的方法。