自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

您目前所在的位置:首页 - 期刊简介 - 详细页面

中南大学学报(自然科学版)

Journal of Central South University

第41卷    第5期    总第195期    2010年10月

[PDF全文下载]    [Flash在线阅读]

    

文章编号:1672-7207(2010)05-1718-06
片状α-Fe2O3的制备及其生长机理
袁晰,叶红齐,刘辉

(中南大学 化学化工学院,湖南 长沙,410083)

摘 要: 以FeCl3·6H2O为原料,复合硫酸盐(Na2SO4+K2SO4)为助熔剂,采用不同的前驱体制备方式得到片状α-Fe2O3粉体。利用SEM和激光粒度分析前驱体制备条件和助熔剂用量对粉体形貌的影响,通过XRD检测进一步探讨α-Fe2O3晶体的生长机理和晶体缺陷的成因。研究结果表明:采用液相法将原料溶于0.2 mol/L稀硫酸中制备前驱体,辅以添加剂,可合成表面光滑、具有明显六角形片状的α-Fe2O3粉体,厚度为400~600 nm,平均径厚比为90,其成分为纯相赤铁矿型α-Fe2O3

 

关键字: 助熔剂法;前驱体;片状α-Fe2O3;晶体生长;晶体缺陷

Preparation of flaky α-Fe2O3 and its growth mechanism
YUAN Xi, YE Hong-qi, LIU Hui

School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China

Abstract:A flaky iron oxide was prepared by FeCl3·6H2O as raw material and sulfate salt mixture (Na2SO4+K2SO4) as flux, using different methods of precursor preparation. The effects of precursor preparation conditions and the ratio of flux on the shape of powders were investigated by SEM and laser granularity analysis, and the phase composition was characterized by XRD, while the mechanism of iron oxide crystal growth and defect was also discussed. The results show that using the liquid process to prepare the precursor in the presence of additives, the iron oxide powder has smooth surface and obvious flaky shape, with a thickness of 400-600 nm, average aspect ratio of 90 and the component of pure hematite α-Fe2O3.

 

Key words: flux method; precursor; flaky α-Fe2O3; crystal growth; crystal defect

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
版权所有:《中南大学学报(自然科学版、英文版)》编辑部
地 址:湖南省长沙市中南大学 邮编: 410083
电 话: 0731-88879765 传真: 0731-88877727
电子邮箱:zngdxb@csu.edu.cn 湘ICP备09001153号