Effect of europium ion on pseudoboehmite phase transition and microstructure

	Effect of europium ion on pseudoboehmite phase transition and microstructure
	Zhu, Fuliang 1; Meng, Yanshuang 1; Wang, Dajian 2
刊名	Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
	2015-08-01
卷号	44 期号:8 页码:1879-1882
关键词	Aluminum oxide Crystallinity Europium Europium compounds Grain boundaries Gravimetric analysis High resolution transmission electron microscopy Ions Microstructure Phase transitions Sols Spray drying Temperature Thermogravimetric analysis X ray powder diffraction Bulk diffusions Differential thermals Europium-doped Field-emission transmission electron microscopies Phase transformation temperature Pseudo-boehmite Spray drying process Transition process pseudoboehmite phase transition Eu3+ doped microstructure
ISSN号	1002185X
英文摘要	After doping Eu(NO3)3 into pseudoboehmite sol suspension, europium-doped pseudoboehmite xerogel was prepared by a spray-drying process. Effects of Eu3+ ions on pseudoboehmite phase transition and microstructure were investigated by differential thermal gravimetric analysis, X-ray powder diffraction and field emission transmission electron microscopy. Results show that upon doping of Eu3+ ions into pseudoboehmite, the phase transition temperatures of γ-Al2O3→θ-Al2O3 and θ-Al2O3→α-Al2O3 increase by 172 and 13, respectively. It is found that Eu3+ ions entirely enter γ-Al2O3 or θ-Al2O3 crystal lattices, and the crystallinity of γ-Al2O3 is improved, resulting in increasing of the phase transition temperature of γ-Al2O3→θ-Al2O3. When α-Al2O3 is generated in the phase transition process, all of Eu3+ ions exist among α-Al2O3 grain boundaries in the form of compound EuA112O19, which will hinder the bulk diffusion of Al3+ resulting in an increase of phase transformation temperature of θ-Al2O3→α-Al2O3 process. Copyright © 2015, Northwest Institute for Nonferrous Metal Research. Published by Elsevier BV. All rights reserved.
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
CSCD记录号	CSCD:5494343
出版者	Rare Metals Materials and Engineering Press
WOS记录号	WOS:000362305600011
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/112928]
专题	材料科学与工程学院省部共建有色金属先进加工与再利用国家重点实验室
作者单位	1.State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Tianjin University of Technology, Tianjin; 300384, China
推荐引用方式 GB/T 7714	Zhu, Fuliang,Meng, Yanshuang,Wang, Dajian. Effect of europium ion on pseudoboehmite phase transition and microstructure[J]. Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering,2015,44(8):1879-1882.
APA	Zhu, Fuliang,Meng, Yanshuang,&Wang, Dajian.(2015).Effect of europium ion on pseudoboehmite phase transition and microstructure.Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering,44(8),1879-1882.
MLA	Zhu, Fuliang,et al."Effect of europium ion on pseudoboehmite phase transition and microstructure".Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering 44.8(2015):1879-1882.