Glassy, Amorphous and Nano-Crystalline Materials: Thermal by Hiroshi Suga (auth.), Jaroslav à esták, Jiří J. Mareš, Pavel

By Hiroshi Suga (auth.), Jaroslav à esták, Jiří J. Mareš, Pavel Hubík (eds.)

Offers a precis of non-equilibrium glassy and amorphous buildings and their macro- and microscopic thermal houses. The ebook incorporates a rigorously chosen works of fourteen the world over famous scientists regarding the advances of the physics and chemistry of the glassy and amorphous states.

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Additional info for Glassy, Amorphous and Nano-Crystalline Materials: Thermal Physics, Analysis, Structure and Properties

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Heat capacities of glassy water and cubic ice. Bull Chem Soc Jpn 41:2591–2599 Johari GP, Hallbrucker A, Mayer E (1987) The Glass-liquid transition of hyperquenched water. Nature 330:552–553 Yue Y, Angell CA (2004) Clarifying the glass transition behaviour of water by comparison with hyperquenched inorganic glasses. Nature 427:717–720 Mishima O, Calvert LD, Whalley E (1984) Melting of ice I at 77 K and 10 kbar. Nature 310:393–395 Andersson O, Suga H (2002) Thermal conductivity of amorphous ices.

An X-ray scattering experiment showed that the dispersion relation of LDA ice for vibrational modes is similar to that of cubic ice Ic, the metastable form of ice at atmospheric pressure. It seems likely that in LDA ice we are closely approaching an ideal glassy state [24]. It is an embarrassment, however, that it is not certain that a characteristic Tg can be assigned to this almost ideal glass. Recent discovery of very high-density amorphous (VHDA) ice makes the situation more complex [25]. Further works with novel idea is highly encouraged for an improved understanding of this intriguing and important substance.

For a system D » 1, we will miss a part or full of the relevant thermodynamic quantity owing to our limited experimental time. The relaxation time is determined by the disordered structure and barrier height hindering the rearrangement of the structure. A particular impurity doped into the system will modify the cooperative nature of the rearrangement and shorten the relaxation time as a whole. Only this process makes possible to observe a transition that has been concealed for a kinetic reason.

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