High-temperature stabilization of bulk amorphous Al <ce:inf loc='post'>2</ce:inf>O <ce:inf loc='post'>3</ce:inf>

Andra? Mavri?; Mattia Fanetti; Gregor Mali; Matjaz Valant

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 >High-temperature stabilization of bulk amorphous Al 2O 3

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High-temperature stabilization of bulk amorphous Al 2O 3

机译：散装高温稳定化散装Al 2 O 3

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We present a method for high temperature stabilization of bulk amorphous aluminium oxide. The stabilization is achieved by dispersing polysilane dendritic molecules in aluminium hydroxide gel, which upon thermal treatment gives amorphous aluminium oxide stable up to 900?°C. The dispersed macromolecules covalently bind to the alumina matrix and induce homogeneously distributed strain fields that keep the alumina amorphous. The thermal conversion of the precursor system was followed by thermogravimetry with an evolved gas analysis, infrared spectroscopy and29Si NMR. The amorphous structure of aluminium oxide was confirmed with an X-ray and electron diffraction. Additionally, the amorphous state was supported by presence of penta-coordinated aluminium detected by27Al NMR and a low bandgap measured by a UV–visible absorption spectroscopy.

机译：我们提出了一种高温稳定的块状非晶氧化铝的方法。通过分散氢氧化铝树枝状凝胶中的聚硅烷树突分子来实现稳定化，该分子在热处理后，使非晶氧化铝稳定达到900Ω·℃。分散的大分子与氧化铝基质共价结合并诱导保持氧化铝无定形的均匀分布的应变场。前体系的热转换后，随后是具有进化气体分析，红外光谱和29SI NMR的热重试剂。用X射线和电子衍射确认氧化铝的无定形结构。另外，通过由27Al NMR检测到的PENTA协调铝的存在和通过UV可见吸收光谱法测量的低带隙来支持非晶态。

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《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》 |2018年第2018期|共8页
作者
Andra? Mavri?; Mattia Fanetti; Gregor Mali; Matjaz Valant;
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作者单位

University of Nova Gorica Materials Research Laboratory;

University of Nova Gorica Materials Research Laboratory;

National Institute of Chemistry;

University of Nova Gorica Materials Research Laboratory;

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原文格式 PDF
正文语种 eng
中图分类非晶态和类晶态;
关键词
Amorphous aluminium oxide; Polysilane; Nanocomposite; Stabilization;

机译：非晶氧化铝;聚硅烷;纳米复合材料;稳定化;

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High-temperature stabilization of bulk amorphous Al 2O 3

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