高压物理学报

Studies of Raman Spectra for MnF2 at High-Pressures

ZHAO Yong-Nian, LIU Zhen-Xian, CUI Qi-Liang, XU Yi-Qiu, FAN Yu-Guo, ZOU Guang-Tian

1990, 4(1): 1-6 . doi: 10.11858/gywlxb.1990.01.001

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Abstract:
High-pressure Raman spectra of MnF2 are reported for the first time. The results show that MnF2 undergoes a structural transition at 1.32 GPa, though the octahedron consisting of 8-fluorine atoms in the cell does not disintegrate due to the transition. No Raman peaks can be seen in the spectrum take...

A Material Test Technique for Super-High Pressure Gasket Material

ZHOU Kai-Yong, YU Xin-Lu

1990, 4(1): 7-16 . doi: 10.11858/gywlxb.1990.01.002

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Abstract:
The mechanical property of super-high pressure gasket material-pyrophyllite is studied in this paper. Based on the analysis of the press shear and the disc-squeezing methods, a new material test technique-pure internal slipping method is suggested. The principal advantage of this method is that the ...

Equation of State and Electronic Transfer for Al, Cu, Pb and Ta under Ultrahigh Pressures

JIN Qing-Hua, DING Da-Tong, WANG Ding-Sheng, LI Guang-Wei

1990, 4(1): 17-23 . doi: 10.11858/gywlxb.1990.01.003

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Abstract:
The electronic structures of the elemental metal Al, Cu, Pb and Ta have been studied in terms of the Augmented Spherical Wave method. The equation of states (T=0) of the metals from the first principle calculations are in good accord with the experiments. The pressure-induced transferences of electr...

Equation of State of Rarefactional Region at T=0 K

LI Mao-Sheng, ZHANG Chun-Bin

1990, 4(1): 24-28 . doi: 10.11858/gywlxb.1990.01.004

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Abstract:
We studied the equation of state at temperature T=0 K and density 0. A new potential form for the cold pressure is presented. The only parameter in the cold pressure formula can be determined via sound velocity c0. The cold pressures obtained from this cold pressure formula are in accordance satisfa...

Vibrational Spectra Studies on Hexagonal BN Crystal and the Synthesis of Cubic BN

QIU Shu-Zhen, LI Bo-Xun, ZHANG Xing-Dong

1990, 4(1): 29-35 . doi: 10.11858/gywlxb.1990.01.005

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Abstract:
X-ray diffraction analysis is used as a reference, the infrared absorption and Raman scattering spectra of various hBN, whose real structures vary from high three-dimensional order to turbostratic structure, are measured. The results indicate that with the lowering of the crystallinity, the position...

The Effect of Diamond Films Grown from Gas Phase on Properties of Substrate Diamond

ZHANG Tie-Chen, JIN Zeng-Sun, Lü Xian-Yi, GUO Wei-Li, ZOU Guang-Tian

1990, 4(1): 36-41 . doi: 10.11858/gywlxb.1990.01.006

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Abstract:
In the present paper, the high pressure diamond crystalline grain with perfect morphology, smooth crystal faces and 252~315 m size are used as substrates. Diamonds have been formed on the substrate diamond by thermal CVD method from gases mixture of methane and hydrogen. The results show that the th...

Optical Spectroscopic Experiments under Quasi-hydrostatic Pressure of 126.5 GPa

ZHA Chang-Sheng, ZHAO Shu-Hui

1990, 4(1): 42-49 . doi: 10.11858/gywlxb.1990.01.007

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Abstract:
A multifunctional spectroscopic system for high pressure experiments using diamond anvil cell has been established. It was used for optical absorption, reflectance, luminescence, and Raman scattering experiments, and a highest quasi-hydrostatic pressure of 126.5 GPa has been obtained for absorption ...

A Study on the Formation and Stability of Quasicrystal Al4Mn under High Static Pressure

YAO Bin, ZHANG Qiang, SU Wen-Hui, XU Da-Peng

1990, 4(1): 50-56 . doi: 10.11858/gywlxb.1990.01.008

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Abstract:
The condition of the formation of quasicrystal Al4Mn and Al6Cr under high static pressure has been investigated for the first time. I-phase and T-phase have been observed in electron diffraction experiment. The structures of Al4Mn quenched at about 100 K/s are different under various pressures form ...

Solid State Amorphous Reaction under High Pressure

YAN Zhi-Hua, CHEN Hong, HUANG Xin-Ming, WANG Wen-Kui, LI Jin-Feng, WANG Yu-Ming

1990, 4(1): 57-62 . doi: 10.11858/gywlxb.1990.01.009

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Abstract:
The X-ray diffraction of the Ni50Ti50 multilayer samples annealed at low temperature and under various pressures is reported in this paper, in which the effect of pressure on the solid state amorphous reaction is considered for the first time. Based on the effects of pressure on the reaction thermod...

Measurement and Analysis of Strain and Calibration of Pressure in Piston-Cylinder Type Apparatus with 4.5 GPa Hydrostatic Pressure

SU Fang, CHE Rong-Zheng, XU Wei, YAN Fei-Na

1990, 4(1): 63-71 . doi: 10.11858/gywlxb.1990.01.010

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Abstract:
This paper gives an experimental method which improves the hydrostatic pressure in the present piston-cylinder type apparatus. Manganin gauges were made successfully and calibrated accurately by phase change of Bi. Measurement and analysis of both strain and relative displacement all show that (1) t...

The Electrical Resistivity of the Main Minerals in Ultramafic Rock, Eclogite and Gabbro under High Pressures

XU Huai-Ji, GUO Jin-Di

1990, 4(1): 72-77 . doi: 10.11858/gywlxb.1990.01.011

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Abstract:
Clinopyroxene, Labrador, omphacite, garnet and enstatite as the main minerals in ultramafic rock, eclogite and gabbro are selected as the samples to study the variations of resistivity of the mantl materials with pressures between 3 GPa and 20 GPa using a DAC device. The results indicated that the r...

Equations of State of Several Kinds of Alloy Steel at High Pressure

BAO Zhong-Xing, ZHANG Zhi-Ting

1990, 4(1): 78-80 . doi: 10.11858/gywlxb.1990.01.012

PDF (937)

Abstract:
The p-V relationships for alloy steel 45CrNiMoV, GCr15 and W18Cr4V at room temperature and up to 4.5 GPa are measured. Their Bridgman's equations, Grneisen parameter 0, bulk moduli B0 and first order pressure derivatives B0' of B0 are also given.

1990 Vol. 4, No. 1

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