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. 2

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Shock Temperature Measurement for Metals (Ⅳ)－'Three Layer Model' and Its Application
TAN Hua, DAI Cheng-Da
2000, 14(2): 81-91 . doi: 10.11858/gywlxb.2000.02.001
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Abstract:
Effects on shock temperature measurements of the gap between the bulk metal sample and the transparent window are specially discussed in detail. A three-layer model corresponding to the bulk metal sample/gap/transparent window target-sample assembly is proposed. A universal analytical solution of th...
High-Pressure Raman Study of Non-Linear Optical Crystals
Shen Ze-Xiang
2000, 14(2): 92-98 . doi: 10.11858/gywlxb.2000.02.002
PDF (618)
Abstract:
In this presentation, we report on the high-pressure Raman spectroscopic studies of some non-linear optical crystals, e. g. KNbO3 (KN), KIO3 (KI) and KTiOAsO4 (KTA), which are important for both their practical applications and theoretical values. The effect of pressure on KN is extremely large and ...
An Experimental Study of the Effects of DDT Tube Materials on the Deflagration to Detonation Transition in Granular RDX Bed
ZHAO Tong-Hu, ZHANG Shou-Qi, ZHANG Xin-Yan, ZHAO Feng, HE Zhi
2000, 14(2): 99-104 . doi: 10.11858/gywlxb.2000.02.003
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Abstract:
The effects of DDT tube materials on deflagration to detonation transition in granular RDX bed ignited by an igniter and an ignition charge have been experimentally studied with self-short (capped) and coaxial ionization pins.
The Synthesis of La1-xNaxTiO3 under High-Pressure and High-Temperature and Its Spectra Study
MIAO Ji-Peng, LI Li-Ping, Lü Zhe, CHE Yu-Lu, SONG Yan-Bin, LU Da-Yong, XU Da-Peng, LIU Hong-Jian, SU Wen-Hui, ZHENG Ying-Guang
2000, 14(2): 105-110 . doi: 10.11858/gywlxb.2000.02.004
PDF (643)
Abstract:
Perovskite oxides of La1-xNaxTiO3 with mixed valence were synthesized under high-pressure and high-temperature. XRD measurement shows that the samples belong to distorted cubic perovskite structure. Volumes of samples decrease as x increases. XPS and EPR measurements indicate that Ti ions are mixed ...
The Synthesis of High-Pressure Phase of BN: E-BN, w-BN, c-BN by Physical Vapor Deposition Method
ZHU Pin-Wen, ZHAO Yong-Nian, ZOU Guang-Tian, HE Zhi
2000, 14(2): 111-114 . doi: 10.11858/gywlxb.2000.02.005
PDF (697)
Abstract:
In this paper we report that we have obtained the E-BN film that was named after the method by which it was obtained (E=Explosion). During the BN films deposition, we suggest a model of phase transition from E-BN to c-BN. We can explain the c-BN nucleation during the deposition by this model. The fi...
Opacities in Au Plasmas
YANG Xiang-Dong, CHENG Xin-Lu, MENG Chuan-Min, YANG Li, WANG Fan-Hou
2000, 14(2): 115-118 . doi: 10.11858/gywlxb.2000.02.006
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Abstract:
Under local thermodynamic equilibrium conditions (LTE), the STA (super transition array) model was used to calculate the parameters of the transition arrays of Au plasmas under certain temperature and density, and also radiative opacity of plasmas under shock loading.
Study on the Property of Nanometric Diamond Particles under High Temperature and High Pressure
WEN Chao, ZHOU Gang, HAO Zhao-Yin, SUN De-Yu, LI Xun, LIU Xiao-Xin, SHI Xiao-Feng, HUO Hong-Fa
2000, 14(2): 119-124 . doi: 10.11858/gywlxb.2000.02.007
PDF (673)
Abstract:
Under high temperature (1 000～1 600 K) and high pressure (5.2 GPa) with Ni70Mn25Co5 (100#) being the catalyst, the growing behavior of nanometric diamond particles (2～10 nm) synthesized by the detonation of the explosives has been investigated. The effects of growing conditions on the microstructure...
Studied on the IR Spectra of Floating Shocked and Polarized Adsorbed Minerals
DONG Fa-Qin, SONG Gong-Bao, WAN Pu, PENG Tong-Jiang, LI Ping, LI Guo-Wu, FENG Qi-Ming
2000, 14(2): 125-132 . doi: 10.11858/gywlxb.2000.02.008
PDF (712)
Abstract:
In this paper the authors compare the IR spectra feature and their change of seven main mineral micro-particles, and analyze their mechanical-structure effect and the surface group transform process after their surfaces being shocked with M3.0 or adsorbed substance with moment of dipole 2.0.
The Effect of Initial Density on Radiation Characteristics of the Wave Front
HONG Yan-Ji, TAN Hua, JIN Xing
2000, 14(2): 133-138 . doi: 10.11858/gywlxb.2000.02.009
PDF (695)
Abstract:
A set of numerical radiation hydrodynamics computation of the structure of strong waves in neon is described. The effect of initial density on spectral and special dependence on the radiation characteristics and the luminosity temperature of the wave front have been taken into account in detail.
Numerical Simulations of Hypervelocity Launchers
LIN Shao-Ming, XU Nan-Xian, CHEN Dong-Quan
2000, 14(2): 139-145 . doi: 10.11858/gywlxb.2000.02.010
PDF (682)
Abstract:
Hypervelocity launchers (HVL) were simulated using a two-dimensional Lagrangian finite element code EPFT101. In the simulation model, a graded-density assembly is used to prevent the melting and fracturing of flier plates. Barrel extension method is adopted to increase launch velocity. The parameter...
Experimental Observation of Shock Waves Driven with 0.35 m Laser
JIANG Shao-En, LI Wen-Hong, DING Yong-Kun, LIU Yong-Gang
2000, 14(2): 146-150 . doi: 10.11858/gywlxb.2000.02.011
PDF (798)
Abstract:
Experimental records of the light emitting from heating luminescence at the rear surface of wedge-shaped aluminum target were obtained by an optical streak camera. The target was irradiated by a focused high power laser beam with 0.35 m wavelength. The scaling relation between shock wave pressure an...
Deformation and Breakup of Droplets behind Shock Wave
LU Shou-Xiang, QIN You-Hua
2000, 14(2): 151-154 . doi: 10.11858/gywlxb.2000.02.012
PDF (806)
Abstract:
A comprehensive model of deformation and breakup of droplets behind a shock is developed according to the dynamics of single particle in the paper. The concept of time for drop firstly misting is applied to analyze the characteristics of the processes of droplet deformation and breakup induced by a ...
Shock Temperature Measurement of Transparent Materials
HU Jin-Biao, TANG Zhi-Ping, TAN Hua
2000, 14(2): 155-160 . doi: 10.11858/gywlxb.2000.02.013
PDF (702)
Abstract:
Under shock compressions, a few special crystal materials have very small absorptance. This means that although they stand in high temperature states on, temperatures can not be detected by using optical radiation techniques because of the low emissivity. In this paper, an optical radiation techniqu...

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