高压物理学报

The Pressure-Temperature Relation for High-Pressure Gases with Compressibility Factor e-1Z at Constant Volume

CAO Zhi-Jue

1995, 9(3): 161-166 . doi: 10.11858/gywlxb.1995.03.001

PDF (819)

Abstract:
The pressure-temperature relation is analytically derived for high-Pressure mixed gases with compressibility factor e-1Z at constant volume in the vicinity of any temperature by using the basic formulae of canonical ensemble as well as thermodynamic equation of state. Applying these expressions to e...

The Structure Transformation in the -FeOOH Nanometer Solid under High Pressure

SUI Yu, XU Da-Peng, SU Wen-Hui

1995, 9(3): 167-175 . doi: 10.11858/gywlxb.1995.03.002

PDF (715)

Abstract:
It is well known that the research on nanometer solid has brought to people's great interest in recent years, but only a few works has been done so far about the properties of nanocrystalline under high pressure. In the present paper, we have synthesized a series of -FeOOH nanometer solid by treatin...

Behavior of Li8SiN4 on cBN Synthesis

ZHOU Yan-Ping, YAN Xue-Wei, ZHAO Ting-He, MA Xian-Feng

1995, 9(3): 176-182 . doi: 10.11858/gywlxb.1995.03.003

PDF (717)

Abstract:
Ternary nitride Li8SiN4 is prepared at 700～750 ℃ in N2 by solid state reaction with LiH and Si3N4. Effects of reaction temperature, time and circumstance as well as stability on pure phase Li8SiN4 are studied in detail. Cubic BN is synthesized using Li-complex nitride and additive Li8SiN4 as catalys...

Effect of High Pressure on the Conductivity of Polyaniline

LIU Zhen-Xing, ZHANG Dian-Lin, WAN Mei-Xiang, LI Ming, LI Jun-Chao

1995, 9(3): 183-187 . doi: 10.11858/gywlxb.1995.03.004

PDF (642)

Abstract:
For conducting polymer polyaniline (PANI) the degree of ordering, conductivity and hopping barrier changes greatly after oriented stretching. In this paper we have studied the effect of hydrcotatic high pressure on the electrical property of oriented and unoriented PANI films. We find that for unori...

Repulsive Potential and Their Multi-Body Expansion of Compressed Atomic Cluster Hen (n＝3, 4, 5)

LIU Fu-Sheng, GOU Qing-Quan, JING Fu-Qian

1995, 9(3): 188-194 . doi: 10.11858/gywlxb.1995.03.005

PDF (704)

Abstract:
Lowdin scheme is applied to calculate the repulsive potentials and their multi-body expansion of compressed atomic clusters Hen (n＝3, 4, 5). It is found that the multi-body expansion converges more slowly as the members of atoms and compression increase. In multi-body expansion, the two-body and fou...

Compressive Property and Equation of State of 4.2Ni2.45Fe0.35CoW Alloy under Pressure from 100 GPa to 500 GPa

WANG Jin-Gui, SHI Wei-Feng

1995, 9(3): 195-202 . doi: 10.11858/gywlxb.1995.03.006

PDF (693)

Abstract:
Investigation of compressive property for tungsten alloy 4.2Ni2.45Fe0.35CoW (93W) in the pressure ranging from 100 GPa to 500 GPa was performed by using a two-stage light-gas gun and symmetric impact technique, The relation between shock velocity, D, and particle velocity, u, can be expressed by D=4...

Theoretical Study on Equation of State of Water at High Temperature and High Densities

LIU Fu-Sheng, GOU Qing-Quan, JING Fu-Qian

1995, 9(3): 203-207 . doi: 10.11858/gywlxb.1995.03.007

PDF (770)

Abstract:
MCR theory is applied to calculate the pVT equation of state of H2O molecules system by using a potential function of two molecules with exp-6 type formula. Comparisons with MD simulations show that states of the system may be at solid phase space in such high temperatures of 2 000～4 000 K because o...

Equations of State and Phase Transitions in KH2PO4 and (CH3NHCH2COOH)CaCl2 at High Pressure

BAO Zhong-Xing, Schmidt V H, LIU Cui-Xia, YU Ting-Nan

1995, 9(3): 208-212 . doi: 10.11858/gywlxb.1995.03.008

PDF (709)

Abstract:
The p-V relationships for KH2PO4 (KDP) and (CH3NHCH2COOH)CaCl2 [trissarcosine calcium chloride (TSCC)] at room temperature and up to 4.5 GPa have been studied using the piston-cylinder type measurement device. The experimental results show that the phase transition in KDP occurs near 2.1 GPa and TSC...

Transformation of Boron Oxide B2O3 under High Pressure and High Temperature

LIU Xiao-Yang, ZHAO Xu-Dong, HOU Wei-Min, SU Wen-Hui

1995, 9(3): 213-217 . doi: 10.11858/gywlxb.1995.03.009

PDF (847)

Abstract:
This paper describes the transformations of boron oxide B2O3 under high pressure and high temperature. We have found that boron oxide B2O3 with cubic system is transformed into hexagonal and orthorhombic B2O3 under a pressure of 5.0 GPa and a temperature of 800 ℃. Under pressure of 4.0 GPa and tempe...

Investigation of the Resistivity in the Reaction Cell While Synthesizing Diamond under HPHT

LUO Xiang-Jie, DING Li-Ye, CHEN Jiang-Hua, HONG Shi-Ming, ZHOU Ming-Hua, LUO Jun-Yi, LIU Xian-Yong

1995, 9(3): 218-223 . doi: 10.11858/gywlxb.1995.03.010

PDF (736)

Abstract:
By measuring the resistance of the reaction cell continuously, the progress of diamond synthesis under various HPHT was detected. The resistivity may vary with the ever changing phase of the materials in the cell and be closely connected to the nucleation and growth of diamond. Such a innovated tech...

Effect of Hydrostatic Pressure on Growth and Breeding of Bacteria in Raw Milk

CHI Yuan-Bin, MA Xiao-Fan, CUI Tian, CUI Qi-Liang, JIN Zeng-Sun

1995, 9(3): 224-227 . doi: 10.11858/gywlxb.1995.03.011

PDF (803)

Abstract:
The effect of pressure on growth and reproductive capacity of bacteria in raw fresh milk is studied in range of hydrostatic pressure from 20 to 120 MPa. The result is following: At room temperature and 20 MPa the raw fresh milk was pressed for 5 minutes then it was return to normal pressure, the phy...

Experimental Investigation of Ignition Features for Solid Explosive Charges under Pressure-Shear Loading

LU Fang-Yun, XUE Hong-Lu, CHEN Pei-Qi, WEI Yu-Zhang, ZHANG Zhen-Yu

1995, 9(3): 228-233 . doi: 10.11858/gywlxb.1995.03.012

PDF (635)

Abstract:
In this paper, one-dimensional planar pressure-shear loading upon solid explosive charges (T/Г40/60, 10#-159), which were cohered to the rear surface of the quartz piece, were realized by means of the waves propagation resulting from planar impacting on a Y-cut quartz piece. Longitudinal (or normal)...

Equation of State for Alkali Halide Crystals High Pressure

YAN Zu-Tong

1995, 9(3): 234-240 . doi: 10.11858/gywlxb.1995.03.013

PDF (639)

Abstract:
In this paper, starting from the total interaction potential function among ions, the equation of state and the relations between B0 and B0', B0 are derived for alkali halide crystals. The calculated value is in good accord with the experimental value. The results show that the equation of state is ...

1995 Vol. 9, No. 3

Login in

NewsMore

LinksMore