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Morphology-controlled Synthesis of Hexagonal AlN Whiskers by Direct Nitridation of Aluminum and Alumina Mixture

机译:铝和氧化铝混合物直接氮化的形态控制合成六方AlN晶须

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摘要

Hexagonal 1D AlN whiskers were synthesized by direct nitridation of aluminum and alumina. The effect of the atmosphere was investigated based on thermody-namic calculation. A green body compacting alumina with different particle size in between 44-420 μm in graphite crucible was found to be favorable for the large-scale synthesis of AlN at 1650 ℃ for 3 h in flowing nitrogen atmosphere. XRD result indicated that hexagonal AlN phase with high purity has been successfully synthesized. SEM and TEM analysis indicated that the whiskers possessed uniform morphology with 100-200 nm in diameter and length up to microns. The formation mechanism was further proposed based on the experimental results.
机译:六角形一维AlN晶须通过铝和氧化铝的直接氮化合成。基于热力学计算研究了大气的影响。发现在石墨坩埚中不同粒度的生坯压实氧化铝在44-420μm之间,对于在氮气流中于1650℃下3小时大规模合成AlN是有利的。 XRD结果表明已成功合成了高纯度的六角形AlN相。 SEM和TEM分析表明该晶须具有均匀的形态,其直径和长度可达100-200 nm。根据实验结果进一步提出了形成机理。

著录项

  • 来源
    《High temperature materials and processes》 |2014年第5期|385-389|共5页
  • 作者单位

    Department of Physical Chemistry, School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;

    Department of Physical Chemistry, School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;

    Department of Physical Chemistry, School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    aluminum nitride whiskers; direct nitriding method; morphology;

    机译:氮化铝晶须;直接氮化法形态学;

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