Notice on the organization of advanced research class on high-pressure science and new materials of engineering knowledge of professional and technical personnel Notice on the organization of advanced research class on high-pressure science and new materials of engineering knowledge of professional and technical personnel

2000 Vol. 14, No. 1

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The Long Distance Propagation of Detonation Waves in the Spherical Shell Charge
FANG Qing, WEI Yu-Zhang, ZHAO Yu-Hua, LONG Jian-Hua, ZHANG Ke-Ming, PU Zheng-Mei
2000, 14(1): 1-5 . doi: 10.11858/gywlxb.2000.01.001
PDF (718)
Abstract:
The experiment of the long distance diffraction propagation of detonation waves in a spherical shell of plastic bonded HMX/TATB=87/7 explosive has been conducted. A simple approximate calculation method is given, which can exactly reconstruct the long distance non-ideal propagation of detonation wav...
Equation of State of Detonation Product (Ⅱ)－Does ZND Theory of Detonation Fail? (B)
LI Yin-Cheng
2000, 14(1): 6-15 . doi: 10.11858/gywlxb.2000.01.002
PDF (805)
Abstract:
Another test is operated for testing the ZND theory of detonation with the Jones relation in this paper. It requires no knowledge of the equation of state other than knowing the fact that it surely exists. Due to only little carelessness, using this method American scientists had drawn the conclusio...
Influence of Consolidated Pressure upon Phase Transition and Ionic Conductivity of Nanophase PbF2
LIU Jin-Fang, WU Xi-Jun, XU Guo-Liang, ZHOU Yu-Song, LI Bing-Han
2000, 14(1): 16-21 . doi: 10.11858/gywlxb.2000.01.003
PDF (645)
Abstract:
The bulk samples with a diameter of 10 mm and thickness of 1 to 2 mm of nanophase PbF2 were prepared by using an inert gas evaporation and in situ consolidating method under the pressure range from 0.3 GPa to 1.8 GPa. The average grain size and phase identification were studied by X-ray diffraction....
Multi-Stage Detonation System－A New Loading Technology for Studying Hypervelocity Impact
WEN Shang-Gang, SUN Cheng-Wei, ZHAO Feng, LI Qing-Zhong
2000, 14(1): 22-27 . doi: 10.11858/gywlxb.2000.01.004
PDF (648)
Abstract:
The problem of accelerating metallic flyers to ultra high speed by multi-stage detonation system is analyzed. The results of theoretical analysis, numerical simulation and experiments show that the hypervelocity flyers can be obtained by this technology. The set-up of this driving system is of advan...
Electrical Properties, Equations of State and Phase Transitions in Hg1-xCdxTe at High Pressure
BAO Zhong-Xing, CHU Jun-Hao, LIU Cui-Xia, GU Hui-Cheng, LIU Ke-Yue, LI Biao, WANG Jin-Yi
2000, 14(1): 28-32 . doi: 10.11858/gywlxb.2000.01.005
PDF (747)
Abstract:
The resistance-pressure and capacitance-pressure relationships for Hg1-xCdxTe (x=0.19, 0.22) at room temperature at pressures up to 20 GPa have been studied in a diamond anvil cell using resistance and capacitance measurements established by us. The experimental results show that Hg1-xCdxTe (x=0.19,...
Phase Transition and Diamond Synthesis of Carbon Nanotubes under High Pressure and High Temperature
CAO Li-Min, ZHANG Ming, ZHANG Xiang-Yi, GAO Chun-Xiao, ZHOU Zhen-Hua, ZHANG Jun, DAI Dao-Yang, SUN Li-Ling, WANG Wen-Kui
2000, 14(1): 33-36 . doi: 10.11858/gywlxb.2000.01.006
PDF (878)
Abstract:
The phase transition of carbon nanotubes under high pressure and high temperature has been investigated by transmission electron microscope and scanning electron microscope. It is found that the nanotubes are unstable under high pressure and high temperature. When being annealed at the temperature r...
The Synthesis of Perovskites Eu1-xKxTiO3 (x=0.2, 0.32) with Mixed Valence in A-Site under High Pressure and Temperature
SONG Xiao-Yu, MIAO Ji-Peng, LI Li-Ping, SU Wen-Hui
2000, 14(1): 37-41 . doi: 10.11858/gywlxb.2000.01.007
PDF (714)
Abstract:
The perovskite oxides Eu1-xKxTiO3 (x=0.2 and 0.32) were synthesized under 4.0 GPa and at 1 090 ℃ with the starting materials TiO2 and Eu2O3. XRD measurements show that the samples are cubic. 151Eu Mossbauer spectra exhibits two peaks at ca. 0 and -13 mm/s, which suggests that Eu ions are in mixed va...
Fractional Diffusion Equation for Anomalous Transport Phenomena
ZENG Qiu-Hua, LI Hou-Qiang, LIU De
2000, 14(1): 42-46 . doi: 10.11858/gywlxb.2000.01.008
PDF (648)
Abstract:
We derive the standard diffusion equation from the continuity equation and by discussing the defectiveness of earlier proposed equations. We get the generalized fractional diffusion equation for anomalous transport.
Researches on Strong Detonation of High Explosives
ZHAO Feng, SUN Cheng-Wei, WEN Shang-Gang, ZHANG Ke-Ming, TAN Duo-Wang
2000, 14(1): 47-53 . doi: 10.11858/gywlxb.2000.01.009
PDF (741)
Abstract:
The speed of strong detonation and its driving abilities in multiple stage explosive/flyer system have been studied by both analysis and experiments. The wedge test method is employed to record the detonation front's track for both TNT/RDX (40/60) and JO-9159 explosives. The abilities of strongly de...
Numerical Simulation of X-Rays for Electro-Magnetically Implosion Experiments
HU Xi-Jing, LIU Gui-Xian, LIAO Hai-Dong
2000, 14(1): 54-61 . doi: 10.11858/gywlxb.2000.01.010
PDF (705)
Abstract:
The paper describes one-dimensional simulation of radiation magneto-hydrodynamics (RMHD) (3T) for X-ray calculation of electro-magnetic implosion. The set of RMHD equations is solved with use of split tricks to avoid possible numerical instabilities due to much coupling in solving the set of highly ...
Shock Wave Equation of State and Shock-Induced Melting of Melanterite
GONG Zi-Zheng, ANDERSON W W, BI Yan, JING Fu-Qian, HUO Hui, TAN Hua
2000, 14(1): 62-69 . doi: 10.11858/gywlxb.2000.01.011
PDF (832)
Abstract:
Shock compression experiments were conducted on melanterite samples with an initial density of 1.714 g/cm3 up to 100 GPa. The experimental data can be divided into a low-pressure region consisting of a partially molten state, and a completely liquid state at high-pressure. The shock velocity D is a ...
Condensed Structure Transformation of HDPE under Shock Pressure
LI Peng, HUANG Rui, LI Liang-Bin, CAI Bi-Hua, FAN Wu-Yi, LIU Fu-Sheng, ZHANG Qing-Fu, SHI Shang-Chun
2000, 14(1): 70-74 . doi: 10.11858/gywlxb.2000.01.012
PDF (761)
Abstract:
In this paper, shock pressed HDPE samples was retrieved and investigated to reveal the effect of shock wave on its crystalline structure and melting process. It is found that shock wave mainly changes the crystallite size and orientation, but has little effect on its lattice structure. The different...
Methods of Absolute Measurement of Equation-of-State in Laser Driving High Pressure Experiments
HUANG Xiu-Guang, GU Yuan
2000, 14(1): 75-80 . doi: 10.11858/gywlxb.2000.01.013
PDF (700)
Abstract:
This paper introduces this technique of side-on radiography and flyer three-step-target. The principles and main experimental results of using them to carry out absolute measurement of equation-of-state in laser driving high pressure experiments are also presented.Moreover some discussions are given...

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