Influence of Mn Doping on the Structure and Properties of Na0.5Bi0.5TiO3 Single Crystals

被引：49

作者：

Ge, Wenwei ^{[1
]}

Li, Jiefang ^{[1
]}

Viehland, Dwight ^{[1
]}

Luo, Haosu ^{[2
]}

机构：

[1] Virginia Tech, Dept Mat Sci & Engn, Blacksburg, VA 24061 USA

[2] Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 201800, Peoples R China

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2010年 / 93卷 / 05期

基金：

美国国家科学基金会;

关键词：

PIEZOELECTRIC PROPERTIES; ELECTRICAL-PROPERTIES; PHASE-TRANSITIONS; CERAMICS; RELAXOR; MICROSTRUCTURE; TRANSPORT; GROWTH; STATE;

D O I：

10.1111/j.1551-2916.2009.03551.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：

Lead-free ferroelectric single crystals of Na0.5Bi0.5TiO3 (NBT) and Mn-doped Na0.5Bi0.5TiO3 (Mn:NBT) have been grown by a top-seeded-solution growth method. The Mn concentration in the as-grown Mn:NBT crystal was determined to be 0.24 at.% by analytical analysis. X-ray diffraction studies revealed that both crystals had a phase transformational sequence of cubic (C)-> tetragonal (T)-> rhombohedral (R) on cooling, although the transition temperatures were decreased slightly by Mn doping. Polarized light microscopy images revealed that ferroelastic domains remained present below the T -> R phase boundary into the R phase field at room temperature for both NBT and Mn:NBT, although the ferroelastic domain size was decreased by a factor of similar to 2 x by Mn. We also found that the piezoelectric, ferroelectric and dielectric properties were enhanced in the R phase field by Mn.

引用

页码：1372 / 1377

页数：6

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