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6. 发明专利

BE767211A 未知
公开(公告)号：BE767211A
公开(公告)日：1971-10-01
申请号：BE767211
申请日：1971-05-14
申请人： UK NI KT I SINT SVERKHTVERDYKH
发明人： SHULZHENKO A A , GETMAN A F
IPC分类号： B01J3/06 , B01J
摘要： 1320844 Synthetic diamonds UKRAINSKY NAUCHNO-ISSLEDOVATELSKY KONSTRUKTORSKO-TEKHNOLOGICHESKY INSTITUT SINTETICHE-SKIKH SVERKHTVERDYKH MATERIALOV I INSTRUMENTA GOSPLANA UKRAINSKOI SSR 14 May 1971 [18 May 1970] 14926/71 Heading C1A In the preparation of diamond, a carboniferous material i.e. a material which, under the conditions of the process liberates carbon, is placed in direct contact with a mercury supplying and/or a lead supplying material i.e. a material which under the conditions of the process of the invention, is able to liberate or exist as free lead or free mercury, respectively, and subjected to a temperature of at least 2000‹ C. and a pressure within the diamond stable region of the diamond/graphite phase diagram corresponding to this temperature. A suitable mercury supplying material is mercury oxide, and a lead supplying material is lead oxide. The carboniferous material may be graphite particularly spectrally pure graphite. When the above mentioned oxides of lead and mercury are used, the volume ratio of graphite to said mercury oxide and/or lead oxide is from 1 : 1 to 2 : 1. The pressure may be at least 90 kilobars.

9. 发明专利

BE759626A Diamond synthesis from graphite and a cata- - lytic metal 未知
公开(公告)号：BE759626A
公开(公告)日：1971-06-01
申请号：BE759626D
申请人： UK NI KT I SINT SVERKHTVERDYKH
发明人： PRIKHNA A I , SHULZHENKO A A , KATSAI M Y
IPC分类号： B01J3/06 , C01B
摘要： Diamonds are synthesised by subjecting a reaction mixture of graphite and a catalytic metal or alloy contg. inclusions of graphite crystals, to a temp. of at least 1150 degrees C, and a pressure of at least 40 kilobars. Pref. the catalyst is prepd. by cooling a molten bath of the metal or alloy, which is satd. with carbon. The initial rate of cooling of the bath is at least 50 degrees C/min. A considerable number of diamond monocrystals with well defined faces are obtained during a relatively short time. The diamonds have a high abrasive power.

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