Structural and nonlinear dielectric properties in fluoride containing SrTiO3 or BaTiO3 ceramics

被引:23
作者
Benziada-Taïbi, L [1 ]
Kermoun, H [1 ]
机构
[1] USTHB, Inst Chim, Bab Ezzouar 16111, Algeria
关键词
oxyfluorides; perovskites; ferroelectric; SrTiO3; BaTiO3; ceramics;
D O I
10.1016/S0022-1139(98)00330-3
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Cold-pressed pellets were prepared from ATiO(3)-MF2-LiF mixtures (A=Sr, Ba; M=Ca, Sr, Ph) and air-fired at 1223 or 1273 K for 2 h. X-ray diffraction analysis were carried out to control the purity and to identify the different phases. Each sample was a perovskite single phase. Superlattice reflections with an orthorhombic symmetry were detected for SrTiO3 compounds whereas no significant change was observed in the structure of BaTiO3 materials. The ceramic microstructure was systematically characterized by scanning electron microscopy. Dielectric measurements were performed as a function of temperature (123 K less than or equal to T less than or equal to 473 K) and frequency (20 Hz less than or equal to f less than or equal to 10(9) Hz). At low frequencies, a diffuse ferroelectric phase transition occurred for (Ba, M)(Ti, Li)(O, F)(3) ceramics. The room temperature frequency dependence of the complex permittivity has shown a resonance phenomenon for (Sr, M)(Ti, Li)(O, F)(3) phases in the range 2 x 10(8) - 5 x 10(8) Hz and a dielectric relaxation in the range 9 x 10(6) - 3 x 10(7) Hz for BaTiO3 related materials. (C) 1999 Elsevier Science S.A. All rights reserved.
引用
收藏
页码:25 / 29
页数:5
相关论文
共 24 条
[1]   FAR-INFRARED FERROELECTRIC VIBRATION MODE IN SRTIO [J].
BARKER, AS ;
TINKHAM, M .
PHYSICAL REVIEW, 1962, 125 (05) :1527-&
[2]   CRYSTALLOGRAPHIC AND DIELECTRIC-PROPERTIES OF NEW FERROELECTRIC OXYFLUORIDES RELATED TO KNBO3 [J].
BENZIADA, L ;
LADJEROUD, Z ;
RAVEZ, J .
FERROELECTRICS, 1991, 124 (1-4) :73-78
[3]   INFLUENCE OF THE EUTECTIC COMPOSITION 1CaF2-4LiF ON THE SINTERING AND THE DIELECTRIC PROPERTIES OF BaTiO3 [J].
Benziada, L. ;
Claverie, J. .
FERROELECTRICS, 1996, 189 :129-138
[4]   FERROELECTRIC BATIO3 CERAMICS SINTERED AT LOW-TEMPERATURE WITH THE AID OF A MIXTURE OF CAF2 AND LIF [J].
BENZIADA, L ;
RAVEZ, J .
JOURNAL OF FLUORINE CHEMISTRY, 1995, 73 (01) :69-71
[5]   INFLUENCE OF THE ADDITION OF BALIF3 ON CRYSTALLOGRAPHIC AND DIELECTRIC-PROPERTIES OF BATIO3 [J].
BENZIADATAIBI, A ;
RAVEZ, J ;
HAGENMULLER, P .
JOURNAL OF FLUORINE CHEMISTRY, 1984, 26 (03) :395-404
[6]  
CROSS LE, 1966, P IMF1 PRAG, P394
[7]  
DEARAUJO CP, 1996, SYNTHESIS BASIC PROP, V10
[8]   SOFT PHONON MODES AND 110 DEGREES K PHASE TRANSITION IN SRTIO3 [J].
FLEURY, PA ;
SCOTT, JF ;
WORLOCK, JM .
PHYSICAL REVIEW LETTERS, 1968, 21 (01) :16-&
[9]  
ISUPOV VA, 1983, IZV AN SSSR FIZ+, V47, P559
[10]   Memory applications based on ferroelectric and high-permittivity dielectric thin films [J].
Jones, RE ;
Zurcher, P ;
Chu, P ;
Taylor, DJ ;
Lii, YT ;
Jiang, B ;
Maniar, PD ;
Gillespie, SJ .
MICROELECTRONIC ENGINEERING, 1995, 29 (1-4) :3-10