Effects of K4CuNb8O23 on the structure and electrical properties of lead-free 0.94(Na0.5K0.5)NbO3-0.06LiNbO3 ceramics

被引：15

作者：

Hao, Jigong ^{[1
]}

Xu, Zhijun ^{[1
,3
]}

Chu, Ruiqing ^{[1
,3
]}

Zhang, Yanjie ^{[1
]}

Li, Guorong ^{[2
]}

Yin, Qingrui ^{[2
]}

机构：

[1] Liaocheng Univ, Coll Mat Sci & Engn, Liaocheng 252059, Peoples R China

[2] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfinem, Shanghai 200050, Peoples R China

[3] Liaocheng Univ, Renewable Energy & Environm Mat Res Ctr, Liaocheng 252059, Peoples R China

来源：

MATERIALS RESEARCH BULLETIN | 2009年 / 44卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Ceramics; Microstructure; Dielectric properties; Piezoelectricity; FREE PIEZOELECTRIC CERAMICS; SINTERING TEMPERATURE; FERROELECTRIC PROPERTIES; FREE PIEZOCERAMICS; MICROSTRUCTURE; CUO; AID;

D O I：

10.1016/j.materresbull.2009.06.011

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Dense K4CuNb8O23-modified (K0.5Na0.5)(0.94)Li0.06NbO3 ceramics were prepared by normal sintering. The effects of K4CuNb8O23 on the phase structure, microstructure and electrical properties of the ceramics were studied. Results showed that K4CuNb8O23 induced a perovskite structure transition from coexistence of orthorhombic and tetragonal phases to orthorhombic symmetry. The addition of K4CuNb8O23 promoted the sintering of(K0.5Na0.5)(0.94)Li0.06NbO3 ceramics and simultaneously caused the grain growth. Moreover, K4CuNb8O23-doping changed the (K0.5Na0.5)(0.94)Li0.06NbO3 to "hard" ceramics and significantly enhanced the mechanical quality factor Q(m). It was found that the (K0.5Na0.5)(0.94)Li0.06NbO3 ceramics doped with 0.60 mol% K4CuNb8O23 exhibited a high mechanical quality factor (Q(m) similar to 983) as well as relatively large d(33) (136 pC/N) and k(p) (35.9%), suggesting that this material is a promising candidate for lead-free piezoelectric ceramics for high-frequency applications. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1963 / 1967

页数：5

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