东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2004, Vol. 25 ›› Issue (8): 768-770.DOI: -

• 论著 • 上一篇    下一篇

化学镀法合成纳米Ag包覆Al_2O_3复合粉

史桂梅;张志东;杨洪才;李丙泽   

  1. 东北大学材料与冶金学院;中国科学院金属研究所;东北大学材料与冶金学院;公州大学 辽宁沈阳　110004
  • 收稿日期:2013-06-24 修回日期:2013-06-24 出版日期:2004-08-15 发布日期:2013-06-24
  • 通讯作者: Shi, G.-M.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50171070)

Synthesis of Ag-cladding Al2O3 powder by chemical deposition

Shi, Gui-Mei (1); Zhang, Zhi-Dong (2); Yang, Hong-Cai (1); Lee, Byong-Taek (3)   

  1. (1) Sch. of Mat. and Metallurgy, Northeastern Univ., Shenyang 110004, China; (2) Inst. of Metal Res., Chinese Acad. of Sci., Shenyang 110016, China; (3) Kongju Natl. Univ., Kongju 314-701, Korea, Republic of
  • Received:2013-06-24 Revised:2013-06-24 Online:2004-08-15 Published:2013-06-24
  • Contact: Shi, G.-M.
  • About author:-
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摘要： 以平均直径约为200nm的Al2O3粉为原料,以氨基溶液为镀液,硝酸银为初始材料,在反应过程中,控制最佳的还原剂浓度、反应时间等参量,使Al2O3表面获得均匀的金属Ag涂层·以HRTEM,XRD,EDS等手段研究了化学镀银所获得的Ag Al2O3复合粉的结构·结果表明,所有的Ag Al2O3复合粉具有壳 核结构,壳层由纳米非晶银和纳米银晶体颗粒构成,尺度分别是5nm和10nm·

关键词: 化学镀, 纳米包覆, 浸渍处理, AgAl2O3复合粉, 核壳结构

Abstract: The raw Al2O3 particles are 200 nm in average diameter. Chemical deposition of Ag was carried out taking ammonia-based solution as bath in which the silver nitrate is primary component. In the reaction process such parameters as the concentration of reducing agent, reaction time and others were optimized in order to clad uniformly all of Al2O3 particles. The result show that all Ag-Al2O3 composite particles are of core-shell structure, of which the shell is composed of amorphous Ag and crystal Ag particles and their sizes are 5 nm and 10 nm respectively. The microstructure of Ag-cladding Al2O3 powder synthesized via silver chemical process was investigated by XRD, TEM and EDS techniques.

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