Determination Method of Acoustical Physical Constants and Their Temperature Coefficients of La_3Ta_<0.5>Ga_<5.3>Al_<0.2>O_<14> Single Crystal
Determination Method of Acoustical Physical Constants and Their Temperature Coefficients of La_3Ta_<0.5>Ga_<5.3>Al_<0.2>O_<14> Single Crystal
复制标题
La_3Ta_<0.5>Ga_<5.3>Al_<0.2>O_<14>单晶声学物理常数及其温度系数的测定方法
DOI：
10.1109/ultsym.2012.0686
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
M.Adachi and J.Kushibiki
中科院分区：
文献类型：
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作者：
Y.Ohashi;T.Karaki;T.Lv;H.Yoshida;M.Arakawa;M.Adachi and J.Kushibiki
利用超声显微光谱技术结合共振法，对La3Ta0.5Ga5.3Al0.2O14（LTGA）单晶的声物理常数及其温度系数进行了精确测定。从LTGA锭制备几个试样（X-、Y-、Z-、29.14°Y-和150.86° Y-切割）。使用UMS系统测量的纵波和横波速度，介电常数，密度和热膨胀系数，确定在室温附近的声学物理常数和它们的温度系数。测量的泄漏表面声波（LSA W）的速度和计算的使用确定的常数在23°C进行了比较，导致在-3.0至1.1米/秒的所有传播方向的良好的协议。用四个旋转Y形棒（-30 ° Y、0°Y、15°Y、30°Y）试样和同一铸锭制备的Y形试样，用共振法测得了-30 ~80 °C范围内的温度系数。将共振法获得的温度系数与UMS技术获得的精确常数相结合，可以确定更可靠的常数和温度系数。
A determination method of accurate acoustical physical constants and their temperature coefficients was demonstrated for La3Ta0.5Ga5.3Al0.2O14(L TGA) single crystal using the ultrasonic microspectroscopy (UMS) technology combined with the resonance method. Several specimens (X-, Y-, Z-, 29.14°Y-, and 150.86°Y-cut) were prepared from an LTGA ingot. Acoustical physical constants and their temperature coefficients around room temperatures were determined using the longitudinal- and shear-wave velocities measured by the UMS system, dielectric constants, density, and thermal expansion coefficients. Measured leaky surface acoustic wave (LSA W) velocities and calculated ones using the determined constants at 23°C were compared, resulting in good agreement within -3.0 to 1.1 m/s for all propagation directions. Using four X-cut rotated Y-bar (-30°Y, 0°Y, 15°Y, 30°Y) specimens and Y-cut specimen prepared from the same ingot, the temperature coefficients in a range from -30 to 80°C were also obtained by the resonance method. Combining the temperature coefficients obtained by the resonance method with the accurate constants obtained by the UMS technology, we can determine more reliable constants and temperature coefficients.