A century of progress in the development of very high pressure apparatus for scientific research and diamond synthesis

1997 ◽  
Vol 29 (3) ◽  
pp. 253-293 ◽  
Author(s):  
Chien-Min Sung
Keyword(s):  
High Pressure ◽  
Scientific Research ◽  
Diamond Synthesis ◽  
High Pressure Apparatus ◽  
Very High

Scientific research at very high pressure

Physics Today ◽  
1964 ◽  
Vol 17 (11) ◽  
pp. 59-63 ◽  
Author(s):  
H. G. Drickamer
Keyword(s):  
High Pressure ◽  
Scientific Research ◽  
Very High

Pressure and temperature control in flat-belt type high pressure apparatus for reproducible diamond synthesis

1999 ◽  
Vol 8 (11) ◽  
pp. 2036-2042 ◽  
Author(s):  
O. Fukunaga ◽  
Y.S. Ko ◽  
M. Konoue ◽  
N. Ohashi ◽  
T. Tsurumi
Keyword(s):  
High Pressure ◽  
Temperature Control ◽  
Diamond Synthesis ◽  
High Pressure Apparatus

Very High Pressure Generation at the Deep Sea

1983 ◽  
Vol 22 ◽  
Author(s):  
Kaichi Suito ◽  
Katsumi Yasukawa
Keyword(s):  
High Pressure ◽  
Hydrostatic Pressure ◽  
Natural Resources ◽  
Deep Sea ◽  
High Pressures ◽  
Large Area ◽  
High Pressure Apparatus ◽  
Very High

ABSTRACTIn the deep sea, truely hydrostatic pressure is produced in a very large area. This pressure may be used as natural resources. By utilizing these resources, very high pressures can be generated using a 6–8 type split-sphere high pressure apparatus. A preliminary experiment to generate very high pressure was undertaken in the deep sea at a depth of about 1000 m. Pressures of about 8.5 GPa were generated in the central part of the high pressure apparatus.

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.

Anion packing density: a universal quantity for both dense and porous crystalline inorganic phases

2002 ◽  
Vol 58 (3) ◽  
pp. 457-462 ◽  
Author(s):  
F. Liebau ◽  
H. Küppers
Keyword(s):  
High Pressure ◽  
Packing Density ◽  
Three Dimensional ◽  
Ionic Radii ◽  
Generalized Framework ◽  
Molal Volumes ◽  
Definition Of ◽  
Anion Packing ◽  
Very High ◽  
Framework Density

To compare densities of inorganic high-pressure phases their molal volumes or specific gravities are usually employed, whereas for zeolites and other microporous materials the so-called framework density, FD, is applied. The definition of FD, which refers only to phases with three-dimensional tetrahedron frameworks, is extended to a `generalized framework density' d f, which is independent of the dimensionality of the framework and the coordination number(s) of the framework cations. In this paper the anion packing density, d ap, is introduced as a new quantity which is not only applicable to any inorganic phase but, in contrast to FD and d f, also allows quantitative comparisons to be made for crystalline inorganic phases of any kind. The anion packing density can readily be calculated if the volume and content of the unit cell and the radii of the anions of a phase are known. From d ap values calculated for high-pressure silica polymorphs studied under very high pressure, it is concluded that Shannon–Prewitt effective ionic radii do not sufficiently take into account the compressibility of the anions.

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