Thermal properties and Brillouin-scattering study of glass, crystal, and "glacial" states in n-butanol
Thermal properties and Brillouin-scattering study of glass, crystal, and "glacial" states in n-butanol
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DOI：
10.1063/1.3258645
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发表时间：
2009-11-07
影响因子：
4.4
通讯作者：
Ramos, Miguel A.
中科院分区：
文献类型：
--
作者：
Hassaine, Merzak;Jimenez-Rioboo, Rafael J.;Ramos, Miguel A.
我们通过非商业量热法和弹性声学布里渊实验研究了正丁醇的相图，并测量了其三种不同状态，即玻璃，晶体和所谓的“冰川”状态的比热和热导率在很宽的低温范围内。这项工作的主要目的是阐明在一些分子玻璃形成液体中发现的这些所谓的多晶转变的有争议的问题，首先报道发生在亚磷酸三苯酯中，后来在正丁醇中。我们的实验结果表明，在正丁醇中得到的冰态是不是一个均匀的，无定形的状态，而是两个不同的共存相的混合物，很可能（受挫）的晶体相嵌入在一个无序的，玻璃相。
We investigated through noncommercial calorimetry and elastoacoustic Brillouin experiments the phase diagram of n-butanol and measured the specific heat and the thermal conductivity in a wide low-temperature range for its three different states, namely, glass, crystal, and the so-called "glacial" states. The main aim of the work was to shed light on the controversial issue of these allegedly polyamorphic transitions found in some molecular glass-forming liquids, first reported to occur in triphenyl phosphite and later in n-butanol. Our experimental results show that the obtained glacial state in n-butanol is not a homogenous, amorphous state, but rather a mixture of two different coexisting phases, very likely the (frustrated) crystal phase embedded in a disordered, glassy phase.