Cs3Bi2I9铁弹材料中的相共存：光学、膨胀和超声速度研究
Phase Coexistence in Cs3Bi2I9 Ferroelastics: Optical, Dilatation and Ultrasonic Velocity Studies
摘要：
本文介绍了Cs_3Bi_2I_9晶体在铁弹相变过程中的电子速度、声速和畴结构的研究结果。结果表明，Cs_3Bi_2 I_9的相变为一级相变。根据Cs_3Bi_2 I_9晶体的热膨胀结果和弹性刚度数据，计算出Tc处的潜热Q= 79 J/kg。在183 K和221 K之间的区域（冷却时）被确定为异质结构区域，其中铁弹性和准弹性相共存。
英文摘要：
The results for dilatometric, ultrasonic velocity and the domain struct-ure studies of Cs3Bi2I9 crystals in the course of ferroelastic phase trans-ition are presented. It is shown that the phase transition in Cs3Bi2I9 is of the first order. Basing on the thermal expansion results and the data obtained for the elastic stiffness of Cs3Bi2I9 crystals, the latent heat Q=79J/kg at Tc is calculated. The region between 183K and 221K (at cooling) is identified as a heterostructure region, where ferroelastic and paraelastic phases coexist.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
