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Effects of Vacuum Heat Treatment of Nano Powder on Sintering of Transparent Nano-crystalline MgAl_2O_4 Ceramics

机译：纳米粉末真空热处理对透明纳米晶MgAl_2O_4陶瓷烧结的影响

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摘要

Nano-sized MgAl_2O_4 powders were treated at 500-1000℃ in a vacuum of 10~(-3) Pa for 2 h, and then sintered at 500～900℃ under 1～6 GPa. The powders with and without vacuum-heat-treatment were investigated by means of Transmission Electron Microscope (TEM) and Sedimentation Test. It was found that the vacuum-heat-treatment of nano powder could effectively get rid of the absorbed gas on the surface of nano-particles. Bulk nanostructured transparent ceramics without cracks were sintered easily with the treated nano-sized powder. The success rate of nano-sinterning of bulk transparent ceramics was greatly increased when a suitable vacuum-heat-treatment process was used for the starting nano-sized powder.
机译：纳米MgAl_2O_4粉体在500〜1000℃，10〜（-3）Pa的真空下处理2h，然后在500〜900℃，1〜6GPa的条件下烧结。采用透射电子显微镜（TEM）和沉降试验研究了有无真空热处理的粉末。发现纳米粉末的真空热处理可以有效地去除纳米颗粒表面上吸收的气体。使用处理后的纳米级粉末可轻松烧结无裂纹的大块纳米结构透明陶瓷。当对起始的纳米级粉末使用适当的真空热处理工艺时，块状透明陶瓷的纳米烧结成功率大大提高。

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  • 来源
    《Key Engineering Materials》 |2010年第2010期|657-660|共4页
  • 作者

    Xianghui Chang; rnDuanwei He; rnJie Zhang; rnYongtao Zou; rnJianghua Wang; rnTiecheng Lu;

  • 作者单位

    Collegeof Physical Scienceand Technology, Southwest Jiaotong University, Chengdu 610031, China;

    Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China;

    rnDepartment of Physics and Key Laboratory of Radiation Physics & Technology of Education Ministry, Sichuan University, Chengdu 610064, China;

    rnInstitute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China;

    rnInstitute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China;

    rnDepartment of Physics and Key Laboratory of Radiation Physics & Technology of Education Ministry, Sichuan University, Chengdu 610064, China;

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

    vacuum heat treatment; nano powder; transparent nano-crystalline MgAl_2O_4 ceramics;

    机译：真空热处理;纳米粉;透明的纳米MgAl_2O_4纳米陶瓷;

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