Resonant Ultrasound Spectroscopy in Small Specimens of Superionic Conductors

(1)共振超声光谱技术（罗斯）已被确立为一个强有力的替代超离子导体的超声性质的测量。通过GPIB的计算机控制和数据采集，共振超声频谱的自动测量已成为可能。低Q值的陶瓷换能器被用来获得准确的测量下研究的样品的共振响应。(2)对各向同性球试件的运动方程进行了解析求解，得到了球模和环模的谱。用该软件对陶瓷轴承的拉梅常数SIN进行了测定。(3)用Fortran语言编制了计算晶体材料共振频率的程序。罗斯法应用于离子晶体CsPbCl_3。然而，由于这种材料的脆弱性，没有进行测量，而从NMR研究中获得的信息已经发表。(4)由于罗斯系统的各向同性球材料已经完成了本研究计划，我们正在应用这种方法的超离子导电玻璃，这是一个有前途的材料作为固体电解质的电池。

(1) A technique of resonant ultrasound spectroscopy (RUS) has been established as a powerful alternative for the measurement of the ultrasonic properties of superionic conductors. The automatic measurement of resonant ultrasound spectrum has become possible by the computer control of the devices and data acquisition through the GPIB.Ceramic transducers with low Q-values were used to obtain accurate measurements of the resonant response of the sample under study.(2) The equation of motion for the isotropic sphere specimen have been solved analytically and the spectra of spheroidal and toroidal modes have been obtained. Its software was used to detemine the Lame's constant of a ceramic bearing, SIN.(3) The Fortran program in which resonance frequencies are calculated from an initial set of elastic constants were made for crystalline sample. The application of RUS method was intended for an ionic crystal, CsPbCL_3. The measurement, however, was not done because of fragility of this material, whereas the information obtained from NMR invetigation was published.(4) Since the RUS system for isotropic sphere materials have been accomplished in this research program, we are applying this method to the superionic conducting glass which is promising material as solid electrolyte of batteries.