东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2007, Vol. 28 ›› Issue (6): 851-854.DOI: -

• 论著 • 上一篇    下一篇

氧化镧对γ-Al_2O_3高温比表面积的影响

刘晓军;于海燕;杨毅宏;毕诗文;   

  1. 东北大学材料与冶金学院;东北大学材料与冶金学院;东北大学材料与冶金学院;东北大学材料与冶金学院 辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110004
  • 收稿日期:2013-06-24 修回日期:2013-06-24 出版日期:2007-06-15 发布日期:2013-06-24
  • 通讯作者: Liu, X.-J.
  • 作者简介:-
  • 基金资助:
    国家“十五”科技攻关项目(2001-BA609A-18)

Influence of lanthana on specific surface area of γ-Al2O3 at high temperature

Liu, Xiao-Jun (1); Yu, Hai-Yan (1); Yang, Yi-Hong (1); Bi, Shi-Wen (1)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2007-06-15 Published:2013-06-24
  • Contact: Liu, X.-J.
  • About author:-
  • Supported by:
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摘要： 为解决γ-Al2O3在高温条件下的热稳定性问题,在实验室模拟工业条件,主要从La2O3,γ-Al2O3的制备方法对γ-Al2O3的热稳定性影响进行研究.研究发现以[La(EDTA)]-为浸渍液时,[La(EDTA)]-组分的适量添加可抑制高温下γ-Al2O3比表面积的下降和向α相的转变,从而提高活性氧化铝的热稳定性,使氧化铝在高温下保持较大的比表面积.添加1%[La(EDTA)]-的样品在1 200℃焙烧10 h其比表面积达61.34 m2/g.此外,还研究了以La2O3为添加剂对γ-Al2O3样品热稳定性的影响,发现La2O3的添加未能提高样品的热稳定性.

关键词: 氧化铝, 氧化镧, 比表面积, 添加剂, 热稳定性

Abstract: The thermal stability of γ-Al2O3 at high temperature was studied and simulated industrially in lab, focusing mainly on the influence of the preparation of La2O3 and γ-Al2O3 on the thermal stability of γ-Al2O3. It was found that when using[La (EDTA)]- as liquid impregnant, keeping properly its concentration can suppress both the reducing specific surface area of γ-Al2O3 and its transform trend towards α-Al2O3 at high temperature, thus improving the thermal stability of γ-Al2O3 to keep its specific surface area bigger. For instance, specific surface area of the samples in which with 1%[La(EDTA)]- roasted at 1200°C for 10 h is up to 61.34 m2/g. Furthermore, the influence of La2O3 as an additive on the thermal stability was studied and the result showed that such an additive fails to improve the thermal stability of γ-Al2O3.

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