论文部分内容阅读
采用纳米压痕法测量了新型无机闪烁体材料LaCl3和LaBr3单晶的弹性模量,以及用波形信号发生器产生的超声波在两种晶体中沿c轴和垂直c轴方向的传播速度,并结合声速,通过Christoffel方程计算得到了两种晶体的弹性常数矩阵,利用第一原理计算了两种晶体沿c轴方向的弹性模量值。结果表明:在LaBr3晶体中声波的传播速度大于LaCl3的;纳米压痕法实验测得LaCl3和LaBr3单晶沿c轴方向的弹性模量值分别约为45.3GPa和32.5GPa,接近真实情况。
The elastic modulus of LaCl3 and LaBr3 single crystal materials of novel inorganic scintillator materials and the propagation speed of ultrasonic waves generated by the waveform generator in the c-axis and vertical c-axis directions were measured by nanoindentation method and combined with The velocity of sound and the matrix of elastic constants of two kinds of crystals were calculated by Christoffel equation. The elastic modulus values along the c axis of the two kinds of crystals were calculated by the first principle. The results show that the propagation velocity of acoustic wave in LaBr3 crystal is higher than that of LaCl3. The elastic modulus of LaCl3 and LaBr3 single crystal along the c axis measured by nanoindentation method are about 45.3GPa and 32.5GPa, respectively, which is close to the real situation.