The Influence of Zinc Doping on the Grain Size and Productivity of Diamond Synthesis in the Ni-Mn-C System at High Pressure and High Temperature

2012 ◽  
Vol 727-728 ◽  
pp. 56-60
Author(s):  
Ana Lúcia Diegues Skury ◽  
Sérgio Neves Monteiro ◽  
Simone S.S. Oliveira
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Diamond Crystal ◽  
Diamond Powder ◽  
Diamond Synthesis ◽  
Doping Agent ◽  
High Temperature Synthesis ◽  
Zn Content ◽  
Zinc Doping ◽  
Reactive Mixture

The development of technological processes for obtaining small size diamond powder is of industrial interest as basic products for roughing and finishing surfaces, like in the polishing of ornamental rocks. Therefore, this work investigates the influence of zinc, as a doping agent, in association with the graphite to diamond transformation, which occurs during high pressure and high temperature synthesis in the presence of Ni-Mn as a catalyst-solvent metallic alloy. Diamond synthesis was carried out at 4.7 GPa of pressure and 1300°C using a reactive mixture with 1:1 ratio of graphite and Ni-Mn alloy powders doped with up to 6% of Zn. The results indicated that the highest diamond yield was obtained for 0.5% while the lowest yield for 6% of Zn. Regardless the Zn content , the diamond crystal were produced with 212/150 μm of granulometry.

Diamond radiation detector made of an ultrahigh-purity type IIa diamond crystal grown by high-pressure and high-temperature synthesis

2001 ◽  
Vol 72 (2) ◽  
pp. 1406 ◽  
Author(s):  
Teruya Tanaka ◽  
Junichi Kaneko ◽  
Daisuke Takeuchi ◽  
Hitoshi Sumiya ◽  
Masaki Katagiri ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Diamond Crystal ◽  
Radiation Detector ◽  
Temperature Synthesis ◽  
High Temperature Synthesis

Effect of Ni2O3 on diamond crystal growth in an Fe–Ni–C system under high temperature and high pressure

CrystEngComm ◽  
2021 ◽  
Vol 23 (15) ◽  
pp. 2809-2815
Author(s):  
Peiyang Mu ◽  
Guangtong Zhou ◽  
Liangchao Chen ◽  
Zhuangfei Zhang ◽  
Yuewen Zhang ◽  
...  
Keyword(s):  
High Pressure ◽  
Crystal Growth ◽  
High Temperature ◽  
Single Crystals ◽  
Diamond Crystal ◽  
Diamond Synthesis

In this paper, the oxygen-containing diamond large single crystals were successfully synthesized by adding Ni2O3 to the Fe–Ni–C system under HPHT. The oxygen affects the P–T conditions for diamond synthesis, and morphology of diamond.

New Features Regarding the High Pressure and High Temperature Diamond Synthesis Growth in the Ni-Mn-C System with Iron Additions

2012 ◽  
Vol 727-728 ◽  
pp. 1345-1348
Author(s):  
Ana Lucia D. Skury ◽  
Quesia F.S.F. Rodrigues ◽  
Guerold Sergueevitch Bobrovinitchii ◽  
Sérgio Neves Monteiro
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Surface Topography ◽  
Growth Process ◽  
Diamond Powder ◽  
Diamond Surface ◽  
Quality Level ◽  
Diamond Synthesis ◽  
Direct Influence ◽  
High Quality

t is well recognized that a catalyst agent is essential to synthesize diamond at high pressure and high temperature. The catalyst agent also acts as a carbon solvent and affects the properties of the final product. This is a consequence of its direct influence on the growth of diamonds crystals. The control of the growth, which is required to achieve a high quality level, is still a question open to discussion. In this work, an industrial diamond powder was synthesized from graphite using Ni-Mn as catalyst alloy added with up to 5% of iron. The synthesis was carried out at 4.5GPa and 1300°C for 10 minutes in high pressure device with central concavity. The analysis of the cubic-shaped diamond surface topography suggests that the formation of defects on the {111} faces is most likely a consequence of a complex growth process that influences the crystal productivity and morphology.

scholarly journals Multianvil High-Pressure/High-Temperature Synthesis and Characterization of multiferroic HP-Co3TeO6

2021 ◽  
Author(s):  
Gunter Heymann ◽  
Elisabeth Selb ◽  
Toni Buttlar ◽  
Oliver Janka ◽  
Martina Tribus ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Type Structure ◽  
Synthesis And Characterization ◽  
Temperature Synthesis ◽  
Space Group ◽  
Crystal System ◽  
High Temperature Synthesis ◽  
High Pressure High Temperature

By high-pressure/high-temperature multianvil synthesis a new high-pressure (HP) phase of Co3TeO6 was obtained. The compound crystallizes in the acentric trigonal crystal system of the Ni3TeO6-type structure with space group R3...

Method to reduce the oil pressure during HPHT diamond synthesis: FEM simulations and experiments

CrystEngComm ◽  
2020 ◽  
Vol 22 (44) ◽  
pp. 7601-7606
Author(s):  
Chunxiao Wang ◽  
Hong-an Ma ◽  
Liangchao Chen ◽  
Xinyuan Miao ◽  
Liang Zhao ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Cell Assembly ◽  
Diamond Synthesis ◽  
Fem Simulations ◽  
High Pressure High Temperature ◽  
New Type

Here, a new type of supercharged cell assembly is proposed that can effectively reduce the oil pressure during high-pressure, high-temperature (HPHT) diamond synthesis.

scholarly journals Hydrogen Evolution Reaction of γ-Mo0.5W0.5 C Achieved by High Pressure High Temperature Synthesis

Catalysts ◽  
2016 ◽  
Vol 6 (12) ◽  
pp. 208 ◽  
Author(s):  
Yingfei Hu ◽  
Gan Jia ◽  
Shuailing Ma ◽  
Jianqiang Hu ◽  
Pinwen Zhu ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Temperature Synthesis ◽  
High Temperature Synthesis ◽  
High Pressure High Temperature

High-Pressure and High-Temperature Synthesis of Anion-Disordered Vanadium Perovskite Oxyhydrides

2021 ◽  
Author(s):  
Kazumasa Miyazaki ◽  
Masayuki Ochi ◽  
Takumi Nishikubo ◽  
Jinya Suzuki ◽  
Takashi Saito ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Temperature Synthesis ◽  
High Temperature Synthesis
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