Related mechanism of transparency in MgAl(2)O(4) nano-ceramics prepared by sintering under high pressure and low temperature

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	Related mechanism of transparency in MgAl(2)O(4) nano-ceramics prepared by sintering under high pressure and low temperature
	J. Zhang; T. C. Lu; X. H. Chang; N. Wei; W. Xu
	2009
发表期刊	Journal of Physics D-Applied Physics
ISSN	0022-3727
卷号	42 期号:5
摘要	We fabricate transparent MgAl(2)O(4) nano-ceramics, which are composed of 40 nm grains, by sintering under high pressure and low temperatures. Analysis of the grain size, differential strains, yield strength and porosity obtained from transmission electron microscopy and x-ray diffraction indicates that the pores at the grain boundary triple junctions can retard grain boundary migration and thus prevent grain growth. It is found that the relatively high density for MgAl(2)O(4) nano-ceramics produced at low-temperature and high pressure is attributed mainly to the large energy in the grain exteriors. The decrease in the transparency with increasing temperature (> 700 degrees C) is therefore a result of the light scattering at large pores. On the basis of these results, we propose a mechanism of transparency in MgAl(2)O(4) nano-ceramics.
部门归属	[zhang, jie; lu, tiecheng; chang, xianghui; wei, nian] sichuan univ, dept phys, chengdu 610064, peoples r china. [zhang, jie; lu, tiecheng; chang, xianghui; wei, nian] sichuan univ, key lab radiat phys & technol, minist educ, chengdu 610064, peoples r china. [lu, tiecheng] chinese acad sci, int ctr mat phys, shenyang 110015, peoples r china. [xu, wen] australian natl univ, res sch phys sci & engn, canberra, act 0200, australia.;zhang, j (reprint author), sichuan univ, dept phys, chengdu 610064, peoples r china;zhjie126@126.com lutiecheng@vip.sina.com
关键词	Model Nanoceramics Alumina Powders
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文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/32547
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. Zhang,T. C. Lu,X. H. Chang,et al. Related mechanism of transparency in MgAl(2)O(4) nano-ceramics prepared by sintering under high pressure and low temperature[J]. Journal of Physics D-Applied Physics,2009,42(5).
APA	J. Zhang,T. C. Lu,X. H. Chang,N. Wei,&W. Xu.(2009).Related mechanism of transparency in MgAl(2)O(4) nano-ceramics prepared by sintering under high pressure and low temperature.Journal of Physics D-Applied Physics,42(5).
MLA	J. Zhang,et al."Related mechanism of transparency in MgAl(2)O(4) nano-ceramics prepared by sintering under high pressure and low temperature".Journal of Physics D-Applied Physics 42.5(2009).