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arXiv 1111.4826cond-mat.stat-mechphysics.chem-ph
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含分子玻璃形成液系中的过量Heat Capacity

The Excess Heat Capacity in Glass-forming Liquid Systems Containing Molecules

H. B. Ke, P. Wen, W. H. Wang

摘要:

本文研究了[xNaNO_3 \cdot(1-x)KNO_3]60[Ca(NO_3)_2]40(0 \leq x \leq 1)和Ca(NO_3)_2 PDMATHABMO_2 O(4 \leq y \leq 13)两种玻璃形成体系在玻璃转变温度下的过剩热容。在前一体系中,Na+离子取代K+离子后,体系的过剩热容几乎不变,约为65.1 J \cdotmol-1 \cdotK-1,而在后一体系中,体系的过剩热容随水摩尔含量的增加而增加38.9 J \cdotmol-1 \cdotK-1。考虑玻璃形成系统中原子和分子的平移运动,建立了过量热容的定量描述。这一发现可能有助于进一步理解玻璃化转变。

英文摘要:

The excess heat capacity at glass transition temperature in two types of glass-forming systems of [xNaNO3\cdot(1-x)KNO3]60[Ca(NO3)2]40 (0 \leq x \leq 1) and Ca(NO3)2\cdotyH2O (4 \leq y \leq 13) is studied. In the former system, with the replacement of K+ cation with Na+ cation, the excess heat capacity is almost invariable around 65.1 J\cdotmol-1\cdotK-1, while the excess increases by 38.9 J\cdotmol-1\cdotK-1 with the increasing per molar H2O content in latter system. A quantitative description of the excess heat capacity is built up with the consideration of atomic and molecular translational motion in the glass-forming systems. This finding might offer further understanding to the glass transition.

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。

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