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Brillouin scattering of glass-forming KCN : x mixture solutions within 0.58 < x < 0.64

机译:玻璃形成KCN:x混合溶液在0.58

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摘要

Few investigations of glass transition in the glass-forming materials [KNO3](x)[Ca(NO3)(2)]((1-x)) (KCN:x), except at x = 0.6 have been performed. The glass-forming range in KCN:x were obtained to be 0.58 < x < 0.64 from in situ observation using a stereoscope. For x < 0.58 and x > 0.64. crystal growth was observed. Brillouin scattering measurements in these mixture solutions, mainly for x values of the glass-forming region, have been performed as a function of temperature. From the thermal compressibilities beta estimated by fitting analysis, their gradients from the glass transition temperature to about 170 degrees C (=T-cr) depend on x. This means that the ways of approaching the glass state from T-cr are slightly different in KCN:x. This T-cr is suggested to be a special temperature in the middle of the supercooling region during cooling and to specify the boundary from a liquid-like state to a solid-like state. (c) 2006 Elsevier B.V. All rights reserved.
机译:除了x = 0.6以外,几乎没有研究玻璃形成材料[KNO3](x)[Ca(NO3)(2)]((1-x))(KCN:x)中的玻璃化转变。通过使用立体镜的原位观察获得的KCN:x中的玻璃形成范围为0.58 0.64。观察到晶体生长。这些混合溶液中的布里渊散射测量主要是针对玻璃形成区域的x值,是随温度变化的。根据通过拟合分析估算的热压缩率β,它们从玻璃化转变温度到约170摄氏度(= T-cr)的梯度取决于x。这意味着在KCN:x中,从T-cr接近玻璃态的方式略有不同。该T-cr被建议为冷却期间的过冷区域的中间的特殊温度,并指定从液态到固态的边界。 (c)2006 Elsevier B.V.保留所有权利。

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