Dielectric and Ferroelectric Characterization of Ba0.95Tm0.05TiO3 Ceramics Derived from Sol to Gel

被引：5

作者：

Cernea, Marin ^{[1
]}

Vasile, Bogdan S. ^{[2
]}

Ganea, Paul ^{[1
]}

Radu, Roxana ^{[1
]}

Mihalache, Valentina ^{[1
]}

Husanu, Adrian ^{[1
]}

机构：

[1] Natl Inst Mat Phys, RO-77125 Bucharest, Romania

[2] Univ Polithn Bucharest, Dept Sci & Engn Oxide Mat & Nanomat, Bucharest 011061, Romania

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2011年 / 94卷 / 03期

关键词：

BARIUM-TITANATE; HYDROTHERMAL SYNTHESIS; BATIO3; PRECIPITATION; SUSPENSION; MECHANISMS; POWDERS;

D O I：

10.1111/j.1551-2916.2010.04179.x

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：

Barium titanate (BaTiO3) has been doped in situ with 5 mol% thulium by a sol-gel method. The as-prepared gel powder consists of nanosized grains (20-30 nm) and crystallizes on the cubic BaTiO3 lattice, at 700 degrees C. Ba0.95Tm0.05TiO3 ceramics derived from this powder have tetragonal perovskite structure and contain a small amount of Tm2Ti2O7 pyrochlore phase. These ceramics exhibit dielectric constants of 4282-3240 and dielectric loss (tan delta) of 0.1077-0.0161 at Curie temperature T-c=132 degrees C and at 10 Hz-100 kHz, respectively. For a drive voltage of 400 V, the hysteresis loop recorded at the frequency of 100 Hz shows a remnant polarization (P-r) value of 76 mu C/cm2 and a coercive field (E-c) of 124 V and for 1 kHz a remnant polarization (P-r) value of 58 mu C/cm2 and a coercive field (E-c) of 116 V.

引用

页码：736 / 741

页数：6

共 26 条

[1] STRUCTURAL PARAMETERS AND ELECTRON DIFFERENCE DENSITY IN BATIO3 [J].