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首页> 外文期刊>Crystallography reports >Mechanisms of Interaction of Molybdenum and Tungsten Polyoxide with Aluminum Oxide Melt under Reducing Conditions
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Mechanisms of Interaction of Molybdenum and Tungsten Polyoxide with Aluminum Oxide Melt under Reducing Conditions

机译:氧化钼与氧化铝熔体在还原条件下的相互作用机理

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摘要

The main chemical reactions between Mo and W polyoxides and Al~(2)O~(3)melt in a controlled Ar + H~(2)atmosphere ( T = 2400 K, P = 1 bar) during sapphire growth by horizontal directional solidification have been investigated. Under these thermodynamic conditions, the melt and products of its dissociative evaporation may actively react with the tungsten heater and molybdenum thermal screens of the crystallization system. It is shown that the polyoxides formed during evaporation do not directly interact with the me this interaction occurs only with participation of reagents exhibiting pronounced reducing properties (Al, H~(2), H, WO, Al~(2)O, AlH, AlH~(2), AlH~(3)). It is established that most of processes occur with participation of aluminum hydrides. A particular role of Mo(W) dioxide–W(Mo) polyoxide functional pairs in the interaction with the melt is determined.
机译:通过水平定向凝固在蓝宝石生长期间,Mo和W聚烷的主要化学反应和Al〜(2)O〜(3)在受控Ar + H〜(2)气氛(T = 2400k,P = 1巴)中熔化 已被调查。 在这些热力学条件下,其解离蒸发的熔体和产物可以与结晶系统的钨加热器和钼热屏进行积极反应。 结果表明,在蒸发过程中形成的聚物不会与熔体直接相互作用; 这种相互作用仅在表现出明显的还原性质(Al,H〜(2),H,WO,Al〜(2)O,AlH,AlH〜(2),alH〜(3))中仅发生这种相互作用。 建立大部分过程在氢化铝的参与中发生。 测定Mo(W)二氧化物-W(Mo)多氧化物功能对与熔体相互作用的特定作用。

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  • 来源
    《Crystallography reports》 |2018年第4期|共7页
  • 作者单位

    Shubnikov Institute of Crystallography Federal Scientific Research Centre “Crystallography and Photonics ” Russian Academy of Sciences;

    Shubnikov Institute of Crystallography Federal Scientific Research Centre “Crystallography and Photonics ” Russian Academy of Sciences;

    Shubnikov Institute of Crystallography Federal Scientific Research Centre “Crystallography and Photonics ” Russian Academy of Sciences;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 晶体学;
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