The structure and infrared spectra of nanostructured MgO-Al2O3 solid solution powders prepared by the chemical method

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	The structure and infrared spectra of nanostructured MgO-Al2O3 solid solution powders prepared by the chemical method
	S. Z. Liao; B. W. Zhang; X. L. Shu; Y. F. Ouyang; H. W. Xie; Z. Y. Xu
	1999
发表期刊	Journal of Materials Processing Technology
ISSN	0924-0136
卷号	90 页码:405-409
摘要	Alumina ceramics has been used widely as an industrial material because of its high heat resistance and excellent wear resistance. Nanosize metal oxide used as raw materials would decrease the sintering temperature of ceramics and enable their physical and chemical properties to be developed fully. This paper studies the synthesis of nanostructured alumina-magnesia powders. The whole compositional range for the binary Al2O3-MgO system is studied. The powder samples are characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), differential thermal analysis (DTA) and infrared spectroscopy (IRS). The results show that the nanostructured alumina-magnesia powders form solid solutions in a wide range of composition. In the alumina-rich side, the gamma-Al2O3 phase is found and the maximum amount of magnesia that can be incorporated is 30%. In the magnesia-rich side, the MgO phase is present and the range of solid solutions is from 0 to 20 wt% Al2O3 It is also found that the lattice parameter a(0) of gamma-Al2O3 increases with increase in the amount of magnesia, but the lattice parameter of the MgO phase decreases with increase in the amount of alumina. The grain size increases linearly with the amount of magnesia added and is smaller than 3.6 nm for alumina solid solution. It changes in a parabolic manner with the amount of alumina and is smaller than 15 nm for magnesia solid solution. The specific surface is about 140 m(2) g(-1) for the powders. The heat decomposition temperature of the precursor determined by DTA is not changed with increase in the amount of magnesia in the gamma-Al2O3 solid solution range. The heat decomposition temperature increases with increase in the amount of alumina in the MgO solid solution range. In the range of mixed phase, it is greater than those in the range of two solid solutions. The results for IRS of the nanostructured alumina-magnesia powders are discussed. (C) 1999 Published by Elsevier Science S.A. All rights reserved.
部门归属	acad sinica, int ctr mat phys, shenyang 110015, peoples r china. hunan educ inst, dept phys, changsha 410012, peoples r china. hunan univ, coll chem & chem engn, changsha 410082, peoples r china. hunan univ, dept appl phys, changsha 410082, peoples r china. guangxi univ, dept phys, nanning 530004, peoples r china. changsha commun univ, changsha 410076, peoples r china.;zhang, bw (reprint author), acad sinica, int ctr mat phys, shenyang 110015, peoples r china
关键词	Nanostructured Alumina-magnesia System Solid Solution Structure Lattice Constant Grain Size Infrared Spectra Particles
URL	查看原文
WOS记录号	WOS:000080762300067
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/37416
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	S. Z. Liao,B. W. Zhang,X. L. Shu,et al. The structure and infrared spectra of nanostructured MgO-Al2O3 solid solution powders prepared by the chemical method[J]. Journal of Materials Processing Technology,1999,90:405-409.
APA	S. Z. Liao,B. W. Zhang,X. L. Shu,Y. F. Ouyang,H. W. Xie,&Z. Y. Xu.(1999).The structure and infrared spectra of nanostructured MgO-Al2O3 solid solution powders prepared by the chemical method.Journal of Materials Processing Technology,90,405-409.
MLA	S. Z. Liao,et al."The structure and infrared spectra of nanostructured MgO-Al2O3 solid solution powders prepared by the chemical method".Journal of Materials Processing Technology 90(1999):405-409.