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Research Article | Open Access

Multi-phase structure and electrical properties of Bi0.5Li0.5ZrO3 doping K0.48Na0.56NbO3 lead-free piezoelectric ceramics

Xiaoyan PENGa,b, Boping ZHANGa(), Lifeng ZHUa, Lei ZHAOc, Ruixiao MAa, Bo LIUa, Xiaodong WANGa
School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
New Metallurgy Hi-Tech Group Co., Ltd., China Iron & Steel Research Institute Group, Beijing 100081, China
Hebei Key Lab of Optic-Electronic Information and Materials, College of Physics Science & Technology, Hebei University, Baoding 071002, China
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Abstract

(1–x)K0.48Na0.56NbO3–xBi0.5Li0.5ZrO3 (KNN–xBLZ, x = 0–0.06) lead-free piezoelectric ceramics were prepared by the conventional solid-state sintering method, and their phase structures and electric properties as well as TC were systematically investigated. The orthorhombic–tetragonal (O–T) two phases were detected in all (1–x)K0.48Na0.56NbO3–xBi0.5Li0.5ZrO3 ceramics at 0.01 ≤ x ≤ 0.05. Due to the appropriate ratio between O phase and T phase (CO/CT = 45/55), high piezoelectric properties of d33 = 239 pC/N, kp = 34%, and Pr = 25.23 μC/cm2 were obtained at x = 0.04. Moreover, a high TC = 348 ℃ was also achieved in KNN–xBLZ ceramic at x = 0.04. These results indicate that (1–x)K0.48Na0.56NbO3–xBi0.5Li0.5ZrO3 system is a promising candidate for high-temperature piezoelectric devices.

Keywords

lead-free piezoelectric ceramicspotassium–sodium niobate (KNN)solid-state sinteringmulti-phaseelectrical properties

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Journal of Advanced Ceramics
Volume 7 Issue 1,
March 2018
Pages 79-87
DOI: 10.1007/s40145-018-0259-3
Cite this article:
PENG X, ZHANG B, ZHU L, et al. Multi-phase structure and electrical properties of Bi0.5Li0.5ZrO3 doping K0.48Na0.56NbO3 lead-free piezoelectric ceramics. Journal of Advanced Ceramics, 2018, 7(1): 79-87. https://doi.org/10.1007/s40145-018-0259-3
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10.1007/s40145-018-0259-3.T001Phase structure and electrical properties of Bi3+ (or Ba2+), Li+, and Zr4+ doped KNN lead-free piezoelectric ceramics

Ceramic systemPhase structure d33 (pC/N) TC (℃) kp (%) Ec (kV/cm) Pr (μC/cm2)Ref.
0.96(K0.48Na0.56)(Nb0.95Sb0.05)O3–0.04(Bi0.8La0.2)0.5(Na0.8Li0.2)0.5ZrO3R–T470210507.116.5Jiang et al. [16]
0.975(K0.40Na0.60)0.985Li0.015(Nb0.94Sb0.06)O3–0.025Bi0.5Na0.5ZrO3R–T390250———Yuan et al. [17]
0.92(Na0.5K0.5)NbO3–0.06BaZrO3–0.02(Bi0.5Li0.5)TiO3PC–T32125653——Shi et al. [18]
0.96(K0.48Na0.52)(Nb0.95Sb0.05)O3–0.04(Bi0.5Li0.5)ZrO3R–T330230——14.5Zheng et al. [19]
0.92(Na0.5K0.5)NbO3–0.02(Bi1/2Li1/2)TiO3–0.06BaZrO3R–T34824357——Wang et al. [20]
0.955K0.48Na0.52NbO3–0.01Bi0.5Na0.5TiO3–0.035Bi0.5(Na0.7K0.2Li0.1)0.5ZrO3R–T3103384517.423.4Cheng et al. [21]
0.955K0.48Na0.52NbO3–0.005BiScO3–0.04Bi0.5(Na0.7K0.2Li0.1)0.5ZrO3R–T36633547——Cheng et al. [22]
0.97K0.40Na0.60Nb0.965Sb0.035O3–0.03Bi0.5Li0.5ZrO3R–T40029247——Zheng et al. [15]
0.95(K0.50Na0.50)0.97Li0.03Nb0.97Sb0.03O3–0.05BaZrO3R–O23526744—21.0Zhang et al. [23]
0.90(Na0.5K0.5)NbO3–0.07BaZrO3–0.03(Bi0.5Li0.5)TiO3R–T26320640.6——Zushi et al. [24]
0.96(K0.48Na0.52)(Nb0.95Sb0.05)O3–0.04Bi0.5(Na0.7K0.2Li0.1)0.5ZrO3R–T38029046——Cheng et al. [25]
0.96(K0.5Na0.5)0.95Li0.05Nb0.93Sb0.07O3–0.04BaZrO3R–T42519750—15.8Zhang et al. [26]
0.94(K0.34Na0.6Ba0.06Nb0.94Zr0.06)O3–0.06LiSbO3R–O–T34417532——Liang et al. [27]
0.96K0.48Na0.56NbO3–0.04Bi0.5Li0.5ZrO3O–T2393483415.225.2This work

10.1007/s40145-018-0259-3.T0022θ and intensity of fitting patterns of O and T phases

Sample O(022) O(200) T(002) T(200)
2θ (°)I2θ (°)I2θ (°)I2θ (°)I
O (PDF#71-0946)44.9036.1045.6517.40————
T (PDF#71-0945)————44.5618.1045.3534.70
x = 045.51593346.211237————
x = 0.0145.38832946.04394345.2455145.94971
x = 0.0345.42264545.91134345.28150945.863219
x = 0.0445.37204145.89121445.21277545.784722
x = 0.0545.37133045.8781345.22231245.783714
x = 0.0645.3650645.8728345.28301045.714720