Spark plasma sintering of grain-oriented Sr2Bi4Ti5O18 aurivillius phase ceramics

被引：15

作者：

Li, Zheng ^{[1
,2
]}

Qi, Wenzhi ^{[3
]}

Cao, Jun ^{[2
]}

Li, Yan ^{[1
]}

Viola, Giuseppe ^{[4
]}

Yan, Haixue ^{[2
]}

机构：

[1] China Univ Geosci, Gemmol Inst, Wuhan 430073, Hubei, Peoples R China

[2] Queen Mary Univ London, Sch Engn & Mat Sci, Mile End Rd, London E1 4NS, England

[3] Lanzhou Univ, Key Lab Magnetism & Magnet Mat MOE, Lanzhou 730000, Gansu, Peoples R China

[4] Inst Mat Phys & Engn, Dept Appl Sci & Technol, Corso Duca Abruzzi 24, I-10129 Turin, Italy

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 782卷

关键词：

Aurivillius; Sr2Bi4Ti5O18; Ferroelectric; Spark plasma sintering; Texture; BISMUTH TITANATE; ORIENTATION;

D O I：

10.1016/j.jallcom.2018.12.175

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

To improve dielectric, piezoelectric and ferroelectric properties of Sr2Bi4Ti5O18 ceramics, highly textured, dense ceramics are required. Highly grain-oriented Sr2Bi4Ti5O18 textured ceramics were prepared by pressure-assisted spark plasma sintering. The textured ceramics exhibited crystallographic anisotropy with c-axis oriented grains (Lotgering factor of 71%). The dielectric permittivity, piezoelectric constant and ferroelectric remnant polarization measured on the ceramics in the direction perpendicular to the pressure applied during sintering are higher than those along the parallel direction. These improved properties are related to the preferred polarization rotation in the textured microstructures prepared during spark plasma sintering. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：6 / 9

页数：4

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