YAG：N_d^（3＋）单晶的二阶和三阶弹性常数  

The elastic behaviour of YAG:N_d￣(3+)crystal under pressure

作　　者：顾惠成[1] 王汝菊[1] 王积方[1] 

机构地区：[1]中国科学院物理研究所

出　　处：《声学学报》1994年第3期196-201,共6页Acta Acustica

摘　　要：我们采用超声“脉冲回波重合法”技术［１］，测定了立方晶体钇铝柘榴石（ＹＡＧ：）的二阶弹性常数，以及它们在静水压和单轴应力条件下，随压力变化，获得了三阶弹性常数．它们分别是：Ｃ１１＝３３４．７８ＧＰａ，Ｃ１２＝１０９．９５ＧＰａ，Ｃ４４＝１１５．２５ＧＰａ，和Ｃ１１１＝－３３７７．６６ＧＰａ，Ｃ１１２＝－８４１．１６Ｇｐａ，Ｃ１２３＝－３２．８６Ｇｐａ，Ｃ１４４＝－３７．６６Ｇｐａ，Ｃ１６６＝－５７９．３８Ｇｐａ，Ｃ４５６＝－１１４．６０Ｇｐａ．根据这些数据，我们还计算了ＹＡＧ：Ｎ＿ｄ￣（３＋）晶体的德拜温度以及Ｇｒｕｎｅｉｓｅｎ参数，以及ＹＡＧ：Ｎ＿ｄ￣（３＋）的状态方程．Under normal condition,and hydrostatic pressure and uniaxial stress conditions,the different modes of longitudinal and shear wave velocities of YAG: single crystal hadbeen measured by ultrasonic pulse echo overlape technique. Based on those data,the secondorder and third-order elastic constants were derived,which are:C11=-334. 78 GPa,C12=109. 95 GPa,C44=115. 25 GPa and C111=-3377. 66 GPa,C112=-841. 16 GPa, C123=-32. 86 GPa, C144=-37. 66 GPa, C166=-579. 38 GPa, C4546=-114. 60 GPa.From those SOEC and TOEC, the Debye temperature ,Grruneisen constant γ,and equation of state of YAG: are obtained

关 键 词：钇铝石榴石 单晶 弹性常数 

分 类 号：TN244[电子电信—物理电子学]