摘要
用超声脉冲回波重合技术（ＰＥＯ），在０．１～５００ＭＰａ流体静压力范围，测量了立方晶体Ｓｉ和Ｂｉ＿（１２）ＧｅＯ＿（２０）中沿［１００］、［１１０］和［１１１］方向传播的纯纵波和切变波自然声速值随压力的变化。根据有限形变理论，由声速与压力关系的实验结果。确定了立方晶体Ｓｉ和Ｂｉ＿（１２）ＧｅＯ＿（２０）超声物态方程的弹性参数（含三阶和四阶弹性常数）。
By using the technique of ultrasonic pulse-echo overlap, the pressure variations ofthe natural sound velocity in cubic crystals Si and Bi_(12)GeO_(20) for pure longitudinal and shear wavespropagating along[100] [110]and[111] direction were measured in0.1～500MPa hydrostaticpressure range. Based on the finite deformation theory , the elastic parameters of the ultrasonicstate equation for cubic crystals Si and Bi_(12)GeO_(20) were evaluated by means Of the experimental re-sults of the pressure dependence of the natural sound velocities under hydrostatic high pressure.
出处
《高压物理学报》
CAS
CSCD
北大核心
1994年第4期279-284,共6页
Chinese Journal of High Pressure Physics
基金
国家自然科学基金和中国科学院内耗与固体缺陷开放实验室资助课题
关键词
立方晶体
物态方程
高压
PEO
测量
弹性常数
cubic crystal, state equation , elastic parameters, high pressure.
