快离子导体玻璃滞弹性弛豫的红外发散响应

本文依据Ngai(倪嘉陵)的低频激发、弛豫、耗散理论和非晶态快离子导体的特点,提出了非晶态快离子导体的滞弹性弛豫理论。认为快离子导体玻璃中的超声吸收主要来源于与玻璃网络呈微弱联系的快离子的热激活弛豫及伴之而来的低能激发的损耗。理论成功地描述了超声吸收的频率、温度依赖关系,解释了弛豫时间分布理论所不能解释的快离子导体玻璃的实验特征。

ANELASTIC RELAXATION WITH INFRARED DIVERGENCE SUPERIONIC GLASSES

Based on the characteristic of superionic glasses and the infrared divergence response theory, we studied the anelastic relaxation of amorphous superionic conductors. We consider that the ultrasonic attenuation of superionic glasses is due to the thermal active relaxation process of mobile superions bonded weakly to the glassy network and the accompanishing low energy excitation dissipation.The theory can explain the experimental characteristics which failed to be interpreted by previous theory with distributed relaxation times. Our predictions agree well with available experimental data.