Relaxor properties of Ba-based layered perovskites

被引：89

作者：

Miranda, C ^{[1
]}

Costa, MEV ^{[1
]}

Avdeev, M ^{[1
]}

Kholkin, AL ^{[1
]}

Baptista, JL ^{[1
]}

机构：

[1] Univ Aveiro, Dept Ceram & Glass Engn, P-3810193 Aveiro, Portugal

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2001年 / 21卷 / 10-11期

关键词：

dielectric properties; perovskites; relaxor ferroelectrics;

D O I：

10.1016/S0955-2219(01)00006-1

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：

Ferroelectric materials with Bi-layered structure such as SrBi2Ta2O9 (SBT) and SrBi2Nb2O9 (SBN) are now intensively investigated in view of their applications in non-volatile computer memories and high-temperature piezoelectric transducers. When Sr is substituted with Ba, significant disorder is induced and material exhibits broadening of the phase transition. In this work, BaBi2Ta2O9 (BBT) and Ba2Bi2Nb2O9 (BBN) ceramics were sintered using mixed oxide route. Dielectric properties were investigated in the temperature range 20-600 degreesC at frequencies 25 Hz to 1 MHz. Strong dispersion of the dielectric permittivity is found indicating relaxor nature of the phase transition. It is shown that the dielectric relaxation in BBN ceramics is different from that of conventional relaxors such as PbMg1/3Nb2/3O3 (PMN). Fitting with Vogel-Fulcher relationship is used to evaluate parameters of the dielectric relaxation such as freezing temperature and attempt frequency. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：1303 / 1306

页数：4

共 11 条

[1] Cation disorder in ferroelectric Aurivillius phases of the type Bi(2)ANb(2)O(9) (A=Ba, Sr, Ca) [J].

Blake, SM ;

Falconer, MJ ;

McCreedy, M ;

Lightfoot, P .

JOURNAL OF MATERIALS CHEMISTRY, 1997, 7 (08) :1609-1613

[2]

CROSS LE, FERROELECTRICS, V987, P241

[3] ELECTRICAL AND OPTICAL PROPERTIES OF FERROELECTRIC BI4TI3O12 SINGLE CRYSTALS [J].

CUMMINS, SE ;

CROSS, LE .

JOURNAL OF APPLIED PHYSICS, 1968, 39 (05) :2268-&

[4] Electromechanical properties of SrBi2Ta2O9 thin films [J].

Kholkin, AL ;

Brooks, KG ;

Setter, N .

APPLIED PHYSICS LETTERS, 1997, 71 (14) :2044-2046

[5]

Lines M. E., 1979, PRINCIPLES APPL FERR

[6] The gods of EPF [J].

Scott, DS .

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 1996, 21 (01) :7-11

[7]

SCOTT JF, 1998, FERROELECTRICS REV, V1, P1, DOI DOI 10.1080/10584589808202046

[8] Crystal structure and ferroelectric properties of ABi2Ta2O9 (A = Ca, Sr, and Ba) [J].

Shimakawa, Y ;

Kubo, Y ;

Nakagawa, Y ;

Goto, S ;

Kamiyama, T ;

Asano, H ;

Izumi, F .

PHYSICAL REVIEW B, 2000, 61 (10) :6559-6564

[9]

SMOLENSKII GA, 1961, SOV PHYS-SOL STATE, V3, P651

[10]

SMOLENSKII GA, 1981, FERROELECTRICS RELAT

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