Understanding the microwave dielectric properties of (Pb0.45Ca0.55)[Fe0.5(Nb1-xTax)0.5]O3 ceramics via the bond valence

被引：39

作者：

Yoon, KH ^{[1
]}

Kim, ES

Jeon, JS

机构：

[1] Yonsei Univ, Dept Ceram Engn, Seoul 120749, South Korea

[2] Kyonggi Univ, Dept Mat Engn, Suwon 442760, South Korea

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2003年 / 23卷 / 14期

关键词：

bond valence; ionic polarizability; IR reflectivity; microwave ceramics; dielectric properties; (PbCa)Fe(NbTa)O-3;

D O I：

10.1016/S0955-2219(03)00187-0

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：

Microwave dielectric properties of the (Pb0.45Ca0.55)[Fe-0.5(Nb1-xTax)(0.5)]O-3 ceramics were investigated in the range of 0.0 less than or equal to x(mol) less than or equal to 1.0. With increasing Ta2O5, the dielectric constant and the temperature coefficient of the resonant frequency (TCF) decreased, while the Q.f value of the specimens increased. The change of dielectric constant was evaluated by the correlation between ionic polarizability and bond valence. TCF of the specimens decreased with the tilting of oxygen octahedra due to an increase of bond valence of the B-site. The Q.f values were studied by infrared reflectivity spectra from 50 to 4000 cm-', and calculated by the Kramers-Kronig analysis and classical oscillator model. The specimens with 0.4 mol of Ta2O5 sintered at 1150degreesC for 3 h showed epsilon(r) of 82, Q.f of 7650, and TCF of -5 ppm/degreesC. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：2391 / 2396

页数：6

共 16 条

[1] Processing and characterization of lead magnesium tantalate ceramics [J].

Akbas, MA ;

Davies, PK .

JOURNAL OF MATERIALS RESEARCH, 1997, 12 (10) :2617-2622

[2] TEMPERATURE DEPENDENCE OF DIELECTRIC CONSTANTS OF CUBIC IONIC COMPOUNDS [J].

BOSMAN, AJ ;

HAVINGA, EE .

PHYSICAL REVIEW, 1963, 129 (04) :1593-&

[3] BOND-VALENCE PARAMETERS FOR SOLIDS [J].

BRESE, NE ;

OKEEFFE, M .

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1991, 47 :192-197

[4] EFFECT OF STRUCTURAL-CHANGES IN COMPLEX PEROVSKITES ON THE TEMPERATURE-COEFFICIENT OF THE RELATIVE PERMITTIVITY [J].

COLLA, EL ;

REANEY, IM ;

SETTER, N .

JOURNAL OF APPLIED PHYSICS, 1993, 74 (05) :3414-3425

[5] CHEMICAL-PROCESSING AND MICROWAVE CHARACTERISTICS OF (ZR,SN)TIO4 MICROWAVE DIELECTRICS [J].

HIRANO, S ;

HAYASHI, T ;

HATTORI, A .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1991, 74 (06) :1320-1324

[6] RELATIONSHIPS BETWEEN DOPANTS, MICROSTRUCTURE AND THE MICROWAVE DIELECTRIC-PROPERTIES OF ZRO2-TIO2-SNO2 CERAMICS [J].

IDDLES, DM ;

BELL, AJ ;

MOULSON, AJ .

JOURNAL OF MATERIALS SCIENCE, 1992, 27 (23) :6303-6310

[7] DIELECTRIC-PROPERTIES OF (PBCA)(MENB)O3 AT MICROWAVE-FREQUENCIES [J].

KATO, J ;

KAGATA, H ;

NISHIMOTO, K .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 1992, 31 (9B) :3144-3147

[8] BA(ZN1/3TA2/3)O-3 CERAMICS WITH LOW DIELECTRIC LOSS AT MICROWAVE-FREQUENCIES [J].

KAWASHIMA, S ;

NISHIDA, M ;

UEDA, I ;

OUCHI, H .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1983, 66 (06) :421-423

[9] Dielectric properties of (Pb0.4Ca0.6)((Fe0.5Nb0.5)1-xTix)O3 ceramics at microwave frequencies [J].

Kim, ES ;

Choi, W ;

Yoon, KH ;

Kim, Y .

FERROELECTRICS, 2001, 257 (1-4) :169-174

[10]

Kim WS, 1999, J AM CERAM SOC, V82, P2111

← 1 2 →