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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Crystalline-amorphous transitions of Ge-Se alloys by mechanical grinding
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Crystalline-amorphous transitions of Ge-Se alloys by mechanical grinding

机译：机械研磨的Ge-Se合金晶态-非晶态转变

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摘要

X-ray diffraction and differential scanning calorimetry (DSC) measurements of Se and GeSe2 during ball milling have been investigated. In this study, amorphous Se and GeSe2 are synthesized by mechanical grinding (MG) recognized as a method of inducing a crystalline-amorphous phase transition. The amorphization of Se is caused from distortion between helical chains connected by van der Waals forces. The enthalpy AH for crystallization of Se by rapid quench is lower than that by the MG. This result suggests that the difference of AH corresponds to that of the structures in intermediate range. Monoclinic GeSe2 is amorphized by disordering between the connected tetrahedra. It is considered that the tetrahedral unit of GeSe2 by the MG is distorted with wide distributions. GeSe2 is completely amorphized after 4 h of grinding, and Se after 30 h in the present milling. The difference indicates that disordering between the connected tetrahedral units in monoclinic GeSe2 is induced more easily than that between chains in trigonal Se. (C) 2001 Elsevier Science B.V. All rights reserved. [References: 7]
机译：研究了球磨过程中Se和GeSe2的X射线衍射和差示扫描量热（DSC）测量。在这项研究中，通过机械研磨（MG）合成了非晶态Se和GeSe2，这种方法被认为是诱导晶态-非晶态相变的一种方法。 Se的非晶化是由范德华力连接的螺旋链之间的变形引起的。快速淬火使Se结晶的焓AH比MG低。该结果表明AH的差异对应于中等范围内的结构的差异。单斜GeSe2通过连接的四面体之间的无序而非晶化。可以认为，MG的GeSe2的四面体单元畸变，分布较宽。在本研磨过程中，GeSe2在研磨4小时后完全非晶化，而Se在30 h后完全非晶化。差异表明，单斜GeSe2中连接的四面体单元之间的无序性比三角Se中的链之间的无序性更容易诱发。 （C）2001 Elsevier Science B.V.保留所有权利。 [参考：7]

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