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Abnormal grain growth of rutile TiO_2 induced by ZrSiO_4

机译:ZrSiO_4诱导金红石型TiO_2的异常晶粒长大

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摘要

Abnormal grain growth (AGG) was observed in rutile TiO_2 formed by the thermal treatment of anatase TiO_2 in the presence of zirconium silicate. This morphological behaviour was seen to occur in sintered powder compacts and thin films with solid state zircon dopants and in TiO_2 coatings on grains of zircon sand. In order to clarify the mechanism of AGG in this system, various doping methods were employed and the morphological consequences of these doping methods were investigated. It was found that doping by Zr and Si does not give rise to abnormal grain growth. The observed phenomena were discussed in terms of morphological and energetic considerations. It is likely that a distinct orientation relationship between rutile TiO_2 and ZrSiO_4 and possible grain boundary liquid formation play a role in giving rise to the rapid growth of faceted prismatic rutile.
机译:在硅酸锆的存在下,通过对锐钛矿型TiO_2进行热处理形成的金红石型TiO_2观察到了异常的晶粒生长(AGG)。观察到这种形态行为发生在具有固态锆石掺杂剂的烧结粉末压块和薄膜中,以及在锆石砂晶粒上的TiO_2涂层中。为了阐明该系统中AGG的机理,采用了各种掺杂方法,并研究了这些掺杂方法的形态学后果。已经发现,通过Zr和Si的掺杂不会引起异常的晶粒生长。从形态和能量方面的角度讨论了观察到的现象。金红石TiO_2和ZrSiO_4之间明显的取向关系和可能的晶界液体形成可能在引起多面棱柱状金红石的快速生长中起作用。

著录项

  • 来源
    《Journal of Crystal Growth》 |2012年第2012期|p.83-91|共9页
  • 作者单位

    School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052, Australia;

    School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052, Australia;

    School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052, Australia;

    School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052, Australia;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    A1. Crystal morphology; A2. Abnormal grain growth; B1. Rutile; B1.TiO_2;

    机译:A1。晶体形态A2。谷物生长异常;B1。金红石;B1.TiO_2;

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