BNT ceramics synthesis and characterization

被引：32

作者：

Ioachim, A

Toacsan, MI

Banciu, MG

Nedelcu, L

Alexandru, H

Berbecaru, C

Ghetu, D

Stoica, G

机构：

[1] Natl Inst Mat Phys, Bucharest, Romania

[2] Univ Bucharest, Fac Phys, Bucharest, Romania

[3] IPEE SA, Curtea De Arges, Romania

来源：

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY | 2004年 / 109卷 / 1-3期

关键词：

barium titanate; ceramics; dielectric resonators; curie temperature; ferroelectrics; paraelectric phase; microwaves;

D O I：

10.1016/j.mseb.2003.10.116

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Investigations on barium neodymium titanate (BNT) prepared by solid state reaction techniques are presented in this paper. The samples were sintered at temperatures, T-s, in a range 1200-1300degreesC. High density values and adequate microwave parameters were obtained by adding 0.5 mol PbO substitutional for BaO. A decrease of the Curie temperature with the increase of the Nd2O3 concentration was confirmed. For the sample with 28 wt.% Nd2O3, 0.5 mol PbO pyroelectric data indicate Curie temperature around 75 K, therefore, at room temperatures, the materials are in paraelectric phase. BNT ceramics with high Nd2O3 concentration (28 wt.%), sintered at 1250degreesC for 2 h appear to be suitable for dielectric resonators for frequencies up to 3 GHz (epsilon(r)=80-90 and Q = 2000). (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：183 / 187

页数：5

共 6 条

[1] Barium neodymium titanate electroceramics: Phase equilibria studies of Ba6-3xNd8+2xTi18O54 solid solution [J].