高压物理学报

Enhancement of Both Ionic Conductivity and Permittivity of the High Polymer Film P(EO)n-CuBr2 under Hydrostatic Pressure (Ⅱ)－Application of Method to Add Plasticizer

SU Fang, DAI Wei-Ping, SU Xiao

2001, 15(3): 161-168 . doi: 10.11858/gywlxb.2001.03.001

PDF (868)

Abstract:
Through the addition of different weights of non-aqueous CuBr2 to polyethylene oxide (molecular weight 5106), a series of high polymer film P(EO)n-CuBr2 (mole ratio n=[EO]/[Cu]=4, 8, 12, 16, 24) were prepared with the method of mixed solution and evaporation in vacuum. Their relative permittivity wa...

Experiments on Reaction of Polyethylene and Water under High Pressure and High Temperature

XIAO Wan-Sheng, WENG Ke-Nan, Lü Guang-Cai, WANG Ben-Shan

2001, 15(3): 169-177 . doi: 10.11858/gywlxb.2001.03.002

PDF (608)

Abstract:
Hydrous and anhydrous pyrolysis of polyethylene under high temperature and high pressure was conducted in diamond anvil cell (DAC) apparatus. Reaction phenomena can be observed by microscope and be recorded by micrography during the experimental processes. At the meantime, in situ fluorescence chang...

Investigations of Complex Fractal Structures with Self-Similarity and Self-Affinity on Fractured Surfaces

TIAN En-Ke, LONG Qi-Wei

2001, 15(3): 178-185 . doi: 10.11858/gywlxb.2001.03.003

PDF (743)

Abstract:
An extensive study of cracked surfaces under complex loading which showed self-similar and self-affine fractal properties was performed. Fractal analysis of the fractured surfaces with fractal dimension D or roughness index H was also discussed. The results indicated that the relations between D and...

Theoretical Research on the Hugoniot Curves of the Mixtures of Carbon and Water

LIU Fu-Sheng, HONG De-Gui, ZHOU Xue-Fen

2001, 15(3): 186-192 . doi: 10.11858/gywlxb.2001.03.004

PDF (594)

Abstract:
In this article, the Hugoniot curves of graphite-water and diamond-water mixtures, with the initial densities of 1.233 g/cm3 and 1.238 g/cm3 respectively, are calculated by use of the two-phase mixing-model and the fluid perturbation variational statistical theory. The results are: (1) The differenc...

Study on Solubility Speciation of Water in Albite Melts

SUN Qiang, ZHENG Hai-Fei, XIE Hong-Sen, GUO Jie

2001, 15(3): 193-198 . doi: 10.11858/gywlxb.2001.03.005

PDF (773)

Abstract:
On the basis of FTIR spectroscopy study on hydrous albite glasses, it is concluded that water dissolves into melts as OH- and H2O simultaneously and these are accordance with 4 500 cm-1 and 5 200 cm-1 in FTIR spectra respectively. In addition, studies also indicate that OH- is dominant in the early ...

Separability of Specific Volume and Its Application to Free-Gas Model of Thermoelectrons

GENG Hua-Yun, TAN Hua, WU Qiang

2001, 15(3): 199-204 . doi: 10.11858/gywlxb.2001.03.006

PDF (741)

Abstract:
Two kinds of systems whose specific volumes can be separated into several parts according to Hamiltonian have been obtained in a grand ensemble. These systems' Hamiltonians are absolutely separable or the chemical potentials of those whose Hamiltonians are not independent can be yielded via respecti...

Study on Dynamic Mechanism of Cellular Structure

HU Xiang-Yu, ZHANG De-Liang

2001, 15(3): 205-214 . doi: 10.11858/gywlxb.2001.03.007

PDF (730)

Abstract:
In this paper, the regular detonation cells were divided into the primary units, referred to as sub-cells of cellular detonation. By examining the dynamic process of detonation waves propagating along these sub-cells, theoretical analysis was conducted to study the dynamic mechanism of the two-dimen...

Theoretical Calculation of Transformation Pressure in Solid Hydrogen Metallization

LI Jun-Jie, ZHU Zai-Wan, JIN Zeng-Sun, ZOU Guang-Tian

2001, 15(3): 215-220 . doi: 10.11858/gywlxb.2001.03.008

PDF (703)

Abstract:
In this paper, the metallic transformation pressure of solid hydrogen is calculated by using the simple metal Pseudopotential method, the possible structures of metallic hydrogen as well as the mechanical and thermal properties of this matter are investigated. The calculation shows that the transfor...

A Problem in Measurements of High Pressure Melting Curve of Iron: Influence of Melting Mechanism on the Melting Temperature

LI Xi-Jun, GONG Zi-Zheng, LIU Fu-Sheng, CAI Ling-Cang, JING Fu-Qian

2001, 15(3): 221-225 . doi: 10.11858/gywlxb.2001.03.009

PDF (806)

Abstract:
High pressure melting curve of iron is crucial in modeling the earth's core. But a system deviation exists between the experimental data of static high-pressure experiments and those of the shock wave experiments. With the help of detailed analysis of possible melting mechanism in the two kinds of e...

High Pressure Synthesis of Bulk MgB2 Superconductor

LI Shao-Chun, ZHU Jia-Lin, YU Ri-Cheng, LI Feng-Ying, LIU Zhen-Xing, JIN Chang-Qing

2001, 15(3): 226-228 . doi: 10.11858/gywlxb.2001.03.010

PDF (806)

Abstract:
Bulk MgB2 superconductor is synthesized through high pressure sintering. The sample having been obtained shows a good single phase. Magnetic measurements and resistivity measurements at low temperature indicate a sharp superconducting transition above 39 K. The experiment results highlight that high...

The Effect of cBN Inclusions on the Densification and Microstructure of Fine-Grained Polycrystalline Diamond Compact

ZHOU Zhen-Jun, LI Gong, YANG Zheng-Fang, CHEN Yu-Ru

2001, 15(3): 229-234 . doi: 10.11858/gywlxb.2001.03.011

PDF (760)

Abstract:
Commercially available synthetic powders of diamond and cubic boron nitride less than 0.5 m were used as the raw materials. Sintering of a fine-grained polycrystalline diamond compact with grains less than 1 m in size was successfully carried out by making a laminate on a WC/Co powder compact under ...

Graphitization Process of Diamond Surfaces During the Sintering of Diamond-Cobalt System under Pressure and Temperature

DENG Fu-Ming

2001, 15(3): 235-240 . doi: 10.11858/gywlxb.2001.03.012

PDF (786)

Abstract:
The conditions of graphitization on diamond surface under high temperature and the graphitization process of diamond under high pressure and temperature were investigated experimentally. The graphitization on the surface of diamond near WC-Co substrate was discovered in samples sintered at the tempe...

2001 Vol. 15, No. 3

Login in

NewsMore

LinksMore