Diffuse phase transition and relaxor behavior in (Pb, La)TiO3 ceramics

被引：6
作者：
Sayouri, S
Kellati, M
Taibi, M
El Moudden, N
Tlemçani, M
El Ghazouali, A
Kaal, A
机构：
[1] Fac Sci Dhar Mehraz, Lab Phys Theor & Appl, Fes, Morocco
[2] Ecole Normale Super, Lab Phys Chim Mat, Rabat, Morocco
[3] Fac Sci Dhar Mehraz, Lab Mat & Protect Environm, Fes, Morocco
[4] ENS, LPMCE, Fes Bensouda, Morocco
[5] Fac Sci & Tech, Dept Chim, Fes, Morocco
来源：
PHYSICA STATUS SOLIDI A-APPLIED RESEARCH | 2004年 / 201卷 / 13期
关键词：
D O I：
10.1002/pssa.200406844
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
(Pb1-xLax)Ti1-x/4O3 (PLTx) ceramics of perovskite type were prepared by the sol-gel process, and their structural and dielectric properties investigated. The obtained compounds crystallize, under heat treatment, at relatively low temperatures and no secondary phases have been observed on the corresponding XRD spectra. Annealing temperature (T-a) and its duration (t(a)) and La-doping appear to influence their structural and dielectric characteristics; in particular a very low temperature of ferroelectric to paraelectric transition is recorded. Results also show that these PLTx ceramics are ferroelectric relaxors and the observed relaxor behavior is expressed in terms of the Vogel-Fulcher relationship. (C) 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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页码：3001 / 3009
页数：9
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