Crystallite size effect on the tetragonal-monoclinic transition of undoped nanocrystalline zirconia studied by XRD and Raman spectrometry

被引:240
作者
Djurado, E [1 ]
Bouvier, P [1 ]
Lucazeau, G [1 ]
机构
[1] Inst Natl Polytech Grenoble, Lab Electrochim & Physicochim Mat & Interfaces, UJF, CNRS,UMR 5631, F-38402 St Martin Dheres, France
关键词
undoped tetragonal nanocrystalline zirconia; monoclinic phase; crystallite size; Raman spectroscopy; XRD;
D O I
10.1006/jssc.1999.8565
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Two powdered batches of undoped zirconia, prepared by spray pyrolysis and characterized by 6.9 and 13.2 nm average crystallite size were annealed for different temperatures and for different times. The tetragonal-monoclinic phase transformation was monitored by Raman spectroscopy and X-ray diffraction. The evolution of parameters such as crystallite size, cia unit cell parameter ratio, content of monoclinic and tetragonal zirconia, and Raman wavenumbers was found to differ from one batch to the other. The destabilization of the tetragonal phase appears for the 10 to 40 nm crystallite size range and as a sudden phenomenon, The critical size range varies with preparation. The wavenumber shifts were also discussed on the basis of internal stresses associated with mechanical balance between the surface and volume states. (C) 2000 Academic Press.
引用
收藏
页码:399 / 407
页数:9
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