【摘要】 讨论了水在正常情况下的相变,并且利用液态低频力学谱方法对玻璃化转变研究领域中一个持续半个多世纪、十分令人困扰的热点——水的玻璃化转变问题进行了研究.用表征玻璃化转变最直接的参量切变模量,首次实现了对水的玻璃化转变过程的明确表征,得出水的玻璃化转变温度是163K,而不是长期一直认为的136K.另外,水的玻璃化转变表现出不同于传统玻璃化转变的反常耗散行为.研究还表明,水的玻璃化转变温度表现出重要的同位素效应,这是水的玻璃化转变奇异特征的一个反映.更多还原

【Abstract】 In this paper,the phase transitions of water were discussed. Moreover,water glass transition,as a hotspot of the glass transition field that lasts out and puzzles scientists more than half of a century,is investigated by the liquid low-frequency mechanical spectrum method recently invented by us in this paper. By the shear modulus that is most direct quantity indicating the glass transition phenomenon,the water glass transition was indicated for the first time. It was obtained that the temperature of glass transition in water water is about 163K,rather than the long time accepted 136K. Moreover,the water glass transition shows an anomalous dissipation behavior that is quite different to the traditional one. The investigation also indicated that the water glass transition temperature has the isotopic effect just as a reflection of its fantastic characteristics.更多还原