THE TRANSFORMATION OF THE STATE OF NITROGEN IN DIAMOND
THE TRANSFORMATION OF THE STATE OF NITROGEN IN DIAMOND作者机构：Shanghai Institute of Ceramics Academia Sinica University of Reading England
出 版 物：《Science in China,Ser.B》 (中国科学B辑(英文版))
年 卷 期：1985年第10期
页 面：1009-1021页
学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学]
主 题：THE TRANSFORMATION OF THE STATE OF NITROGEN IN DIAMOND
摘 要：Synthetic type Ib diamonds have been treated in the temperature range of 1500℃—2500℃ under stabilizing pressures of 6.5 GPa and 9.5 GPa. All nitrogen aggregates found in natural type Ia diamonds have been produeed. The single substitutional nitrogen was converted into A-centres, B-centres and N3-centres. The 7,3 μm peak of the infrared absorption spectrum and the associated platelets have been farmed. The synthetic type Ib diamonds have become much harder after heat treatment at above 2000℃ under a stabilizing pressure of about 9.5 GPa. Natural type Ia diamonds have been treated up to 2700℃ under a stabilizing pressure of about 9.5 GPa. The 7.3μm, 7.8μm, 8.5μm, 9.1μm, 9.9μm absorption peaks in infrared absorption spectrum have been changed. A-centres have been converted into B-centres and broken up into single nitrogen atoms, forming N3-centres.
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