Ferroelectric Properties of BiFeO3 Ceramics Sintered under Low Oxygen Partial Pressure

被引：13

作者：

Kim, A. Young ^{[1
]}

Lee, Ye Ji ^{[1
]}

Kim, Jeong Seog ^{[1
]}

Han, Seung Ho ^{[2
]}

Kang, Hyung-Won ^{[2
]}

Lee, Hyeung-Gyu ^{[2
]}

Cheon, Chae Il ^{[1
,3
]}

机构：

[1] Hoseo Univ, Dept Semicond & Display Engn, Asan 336795, South Korea

[2] Korea Elect Technol Inst, Elect Mat & Device Res Ctr, Songnam 463816, South Korea

[3] Hoseo Univ, Dept Mat Sci & Engn, Asan 336795, South Korea

来源：

JOURNAL OF THE KOREAN PHYSICAL SOCIETY | 2012年 / 60卷 / 01期

关键词：

BiFeO3; ceramic; Ferroelectric; Sintering; MULTIFERROIC BIFEO3; POLARIZATION; HETEROSTRUCTURES;

D O I：

10.3938/jkps.60.83

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

BiFeO3 ceramics were prepared in various atmospheres with hydrothermally-synthesized BiFeO3 crystalline powders, and their dielectric and ferroelectric properties were investigated. The single BiFeO3 phase was formed when the sample was sintered at 800 degrees C under air, and a minor Bi2Fe4O9 phase was observed when it was sintered under a N-2 or an Ar atmosphere. The BiFeO3 ceramic sintered under N-2 showed a dense microstructure and superior electric properties: a dielectric constant of 75, a low loss tangent of 0.01 at 100 kHz and a high resistivity of 1.37 x 10(11) Omega.cm. A pinched and asymmetric P-E hysteresis and a typical butterfly-shaped S-E loop were observed in the BiFeO3 ceramic sintered under N-2. The electric properties of BiFeO3 ceramics sintered in various atmospheres are discussed on the basis of defect chemistry.

引用

页码：83 / 87

页数：5

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