Grain size effect on the structural and dielectric properties of Pb0.85La0.15TiO3 ferroelectric ceramic compound

被引:16
作者
Mesquita, Alexandre [1 ,2 ,3 ]
Basso Bernardi, Maria Ines [1 ]
Godart, Claude [2 ,3 ]
Pizani, Paulo Sergio [4 ]
Michalowicz, Alain [2 ,3 ]
Mastelaro, Valmor Roberto [1 ]
机构
[1] Univ Sao Paulo, IFSC, Sao Carlos, SP, Brazil
[2] CNRS, Inst Chim & Mat Paris Est, F-94320 Thiais, France
[3] Univ Paris Est, F-94320 Thiais, France
[4] Univ Fed Sao Carlos, Dept Fis, BR-13560 Sao Carlos, SP, Brazil
基金
巴西圣保罗研究基金会;
关键词
Grain size; Ferroelectrics; PLT; Spark plasma; Raman; XANES; X-RAY-DIFFRACTION; PHASE-TRANSITION; SOLID-SOLUTIONS; FINE-STRUCTURE; DISORDER; TEMPERATURE; SPECTROSCOPY; SPECTRA; POWDERS; RANGE;
D O I
10.1016/j.ceramint.2012.04.039
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
This paper presents a study of the influence of particle size on the structural and dielectric properties of Pb0.85La0.15TiO3 (PLT15) ferroelectric ceramic samples. The samples were prepared with average grain size of 1.69 +/- 0.08 mu m and 146 +/- 8 nm using, respectively, conventional and spark plasma sintering techniques. A decrease in the tetragonality degree as the crystallite size decreased was explained by an internal stress caused by the existence of a large amount of grain boundaries. The local structure exhibited no significant modification and the dielectric measurements showed a diffuse phase transition and a reduction in the permittivity magnitude at T-m as the average grain size decreased. The nanostructured ceramic sample prepared at a relatively lower temperature and sintering time presented a dielectric constant value of approximately 2000 at room temperature. (c) 2012 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
引用
收藏
页码:5879 / 5887
页数:9
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