The Crystalline Structure and Phase-Transitional Behavior of (Li0.12Na0.88)(Nb1-x%Sbx%)O3 Lead-Free Piezoelectric Ceramics with High Qm

被引：22

作者：

Chen, Qiang ^{[1
]}

Peng, Zhihang ^{[1
]}

Liu, Hong ^{[1
]}

Xiao, Dingquan ^{[1
]}

Zhu, Jiliang ^{[1
]}

Zhu, Jianguo ^{[1
]}

机构：

[1] Sichuan Univ, Coll Mat Sci & Engn, Chengdu 610064, Peoples R China

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2010年 / 93卷 / 09期

关键词：

Perovskite - Lithium compounds - Solid state reactions - Sodium compounds - Niobium compounds - Antimony compounds - Crystal symmetry - Piezoelectric ceramics - Piezoelectricity;

D O I：

10.1111/j.1551-2916.2010.03813.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 piezoelectric ceramics with formula (Li0.12Na0.88) (Nb1-x%Sbx%)O-3 were prepared by the conventional solid-state reaction method. The effects of Sb5+ doped into (Li0.12Na0.88) NbO3 B site were studied. Within the selected compositional range, all the samples have a single perovskite structure. The crystal structure changed from rhombohedral to orthorhombic at x=1, and from orthorhombic to tetragonal symmetry at x=6. The presence of orthorhombic to tetragonal morphotropic phase boundary was proposed when 3 < x < 6. By substituting Sb5+ for Nb5+, dielectric property and impedance characteristic were enhanced, but the Curie temperature and the ferroelectricity were decreased. The optimum composition was x=3, for which the maximum value of the mechanical quality factor Q(m) was as high as 1780, piezoelectric constant d(33) and Curie temperature T-c were 45 pC/N and 300 degrees C, respectively.

引用

页码：2788 / 2794

页数：7

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