• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Symposium on Spatially Resolved Characterization of Local Phenomena in Materials and Nanostructures Dec 2-6, 2002 Boston, Massachusetts, U.S.A. >Quantification of Displacement Fields from Lattice Images (HREM) and Electron Exit Waves in Nanostructured Composite Oxides
【24h】

Quantification of Displacement Fields from Lattice Images (HREM) and Electron Exit Waves in Nanostructured Composite Oxides

机译：纳米结构复合氧化物中晶格图像（HREM）和电子出口波的位移场的量化

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Oxide composites have been produced by means of mechanical milling and sintering. Such materials consist of magnetic particles embedded in an insulating oxide matrix, which can have application as magnetic wave absorbers. Different systems have been investigated including MgO-MgFe_2O_4, FeO-Fe_3O_4 and other more complex ferrites. Milling induces the formation of a solid solution of cations and oxygen. Depending on temperature and system, sintering can produce a particle dispersion or simply the starting of the corresponding phase transformation. Spark plasma sintering was performed between 773 and 1373 K in order to reduce both processing time and temperature. High resolution (HREM) and conventional transmission electron microscopy show that an spinodal decomposition takes place in the system FeO-Fe_3O_4 during transformation from the solid solution. Generally the oxygen lattice is unique throughout the material but there is a distinctive distribution of cations giving rise to a particle dispersion having an spinel structure in a insulating matrix with a NaCl cubic structure.
机译：氧化物复合材料是通过机械研磨和烧结生产的。这样的材料由嵌入绝缘氧化物基质中的磁性颗粒组成，该磁性颗粒可以用作电磁波吸收剂。已经研究了不同的系统，包括MgO-MgFe_2O_4，FeO-Fe_3O_4和其他更复杂的铁氧体。研磨诱导形成阳离子和氧的固溶体。取决于温度和系统，烧结可能会产生颗粒分散，或只是开始相应的相变。为了减少处理时间和温度，在773至1373 K之间进行了火花等离子体烧结。高分辨率（HREM）和常规的透射电子显微镜显示，在从固溶体转变的过程中，FeO-Fe_3O_4系统发生了旋节线分解。通常，氧晶格在整个材料中都是唯一的，但阳离子的独特分布会导致在具有NaCl立方结构的绝缘基质中具有尖晶石结构的颗粒分散体。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号