Effect of LiSbO3 Content on the Microstructure and Piezoelectric Properties of K0.5Na0.5NbO3 Lead-free Ceramics Doped with BiMnO3

doi:10.3724/SP.J.1077.2013.12229

Journal of Inorganic Materials ›› 2013, Vol. 28 ›› Issue (3): 321-325.DOI: 10.3724/SP.J.1077.2013.12229

• Research Paper • Previous Articles Next Articles

Effect of LiSbO₃ Content on the Microstructure and Piezoelectric Properties of K_0.5Na_0.5NbO₃ Lead-free Ceramics Doped with BiMnO₃

JIANG Min-Hong^{1, 2}, LIU Xin-Yu^{1, 2}, CHEN Guo-Hua¹, ZHU Gui-Sheng¹, XU Ji-Wen¹, MA Jia-Feng²

(1. Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, China; 2. College of Material Science and Engineering, Central South University, Changsha 410083, China)

Received:2012-04-12 Revised:2012-06-25 Published:2013-03-20 Online:2013-02-20
Supported by:
National Natural Science Foundation of China (51102056); Natural Science Foundation of Guangxi Province (2011GXNSFB018008, 2012GXNSFGA060002); Program for Excellent Talents in Guangxi Higher Education Institutions; Research Program of Guangxi Education Department (201012MS085)

Abstract

Abstract: Lead-free (0.996–x)KNN-0.004BM-xLS (x=0, 0.01, 0.02, 0.03, 0.04, 0.05, 0.06) ceramics were prepared by the traditional ceramic sintering processing. The effect of LS content on the microstructure and piezoelectric properties of KNN-BM lead-free ceramics was investigated. The results show that the ceramics have a single orthorhombic phase structure when x≤0.02, a co-existed phases orthorhombic and tetragonal phases structure at 0.03≤x≤0.05, and a single tetragonal phase structure at x=0.06. The morphotropic phase boundary (MPB) for the ceramics is identified in the composition range of 0.03≤x≤0.05. With increasing the LS content, both d33 and kp of the ceramics firstly increase and then decrease. At x=0.05, d33 and kp reach their maximum values which are 230 pC/N and 0.42, respectively. The T_o-t and T_c of the ceramics shift to the low temperature with the increasing of the LS content. The T_o-t and T_c of the ceramics are 455 and 215℃ at x=0, 385 and 150℃ at x=0.02, 370 and 75℃ at x=0.06, respectively.

Key words: lead-free piezoelectric ceramics, K_0.5Na_0.5NbO₃, BiMnO₃, LiSbO₃, piezoelectric property

CLC Number:

TM282

JIANG Min-Hong, LIU Xin-Yu, CHEN Guo-Hua, ZHU Gui-Sheng, XU Ji-Wen, MA Jia-Feng. Effect of LiSbO₃ Content on the Microstructure and Piezoelectric Properties of K_0.5Na_0.5NbO₃ Lead-free Ceramics Doped with BiMnO₃[J]. Journal of Inorganic Materials, 2013, 28(3): 321-325.

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Effect of LiSbO₃ Content on the Microstructure and Piezoelectric Properties of K_0.5Na_0.5NbO₃ Lead-free Ceramics Doped with BiMnO₃

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