Synthesis of diamond with the highest nitrogen concentration
Synthesis of diamond with the highest nitrogen concentration
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DOI：
10.1016/s0925-9635(99)00022-9
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发表时间：
1999-08-01
影响因子：
4.1
通讯作者：
Yamaoka, S
中科院分区：
文献类型：
--
作者：
Kanda, H;Akaishi, M;Yamaoka, S
本文用红外吸收显微镜测量了用非金属溶剂-催化剂Na_2CO_3和Na_2SO_4生长的金刚石中的氮浓度。发现当使用由氮化硼制成的样品容器时，1200至1900原子ppm的氮原子结合在晶体中，尽管当使用NaCl容器代替BN时存在几百ppm的氮。当使用传统的金属溶剂催化剂时，在合成金刚石中尚未发现如此高浓度的氮。这项研究的结果与天然金刚石的推断一致，其中通常存在高浓度的氮，从熔融岩石中生长出来，即，非金属催化剂。(C)1999年Elsevier Science S.A. All rights reserved.
Nitrogen concentrations in diamond grown from non-metallic solvent-catalysts such as Na2CO3 and Na2SO4 have been measured using infrared absorption microscopy. It was found that 1200 to 1900 atomic ppm of nitrogen atoms are incorporated in the crystals when a sample container made of boron nitride was used, although a few hundred ppm of nitrogen were present when an NaCl container was used instead of BN. Such high concentrations of nitrogen have not been found in synthetic diamonds when conventional metallic solvent-catalysts are used. The result of this study is consistent with the inference that natural diamond, in which high concentrations of nitrogen are usually present, grew from molten rocks, i.e., non-metallic catalysts. (C) 1999 Elsevier Science S.A. All rights reserved.