Sintering characteristic and piezoelectric properties of lead-free (K0.5Na0.5)NbO3-LiNbO3 ceramics

Fu Sheng Tang; Hong Liang Du; Dai Jun Liu; Fa Luo; Wan Cheng Zhou

Sintering characteristic and piezoelectric properties of lead-free (K_0.5Na_0.5)NbO₃-LiNbO₃ ceramics

Fu Sheng Tang, Hong Liang Du, Dai Jun Liu, Fa Luo, Wan Cheng Zhou

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

Lead-free (1-x)(1-x) (K_0.5Na_0.5) NbO₃-xLiNbO₃ piezoelectric ceramics were prepared by a traditional ceramic processing. The sintering characteristic, the microstructure and electrical properties of (1-x) (K_0.5Na_0.5) NbO₃-LiNbO₃ ceramics were investigated. Results show that all specimens exhibit a pure perovskite structure and the phase structure at room temperature transforms from orthorhombic to tetragonal with the increase of LiNbO3.The microstructure of (1-x) (K_0.5Na_0.5) NbO₃-LiNbO₃ ceramics exhibits apparent difference due to different amounts of LiNbO₃. The sinterability of (1-x) (K_0.5Na_0.5) NbO₃-LiNbO₃ is improved and the sintering temperature is lower than that of pure KNN ceramics. The (1-x) (K_0.5Na_0.5) NbO₃-LiNbO₃ (x=0.06) ceramics exhibits an excellent piezoelectric properties with the piezoelectric constant d₃₃, the electromechanical coupling coefficients k_p and k_t of 205pC/N, 40.3% and 49.8%, respectively.

Original language	English
Pages (from-to)	323-327
Number of pages	5
Journal	Wuji Cailiao Xuebao/Journal of Inorganic Materials
Volume	22
Issue number	2
State	Published - Mar 2007

Keywords

(KNa) NbO-LiNbO
Lead-free piezoelectric ceramics
Perovskite structure
Piezoelectric properties

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title = "Sintering characteristic and piezoelectric properties of lead-free (K0.5Na0.5)NbO3-LiNbO3 ceramics",

abstract = "Lead-free (1-x)(1-x) (K0.5Na0.5) NbO3-xLiNbO3 piezoelectric ceramics were prepared by a traditional ceramic processing. The sintering characteristic, the microstructure and electrical properties of (1-x) (K0.5Na0.5) NbO3-LiNbO3 ceramics were investigated. Results show that all specimens exhibit a pure perovskite structure and the phase structure at room temperature transforms from orthorhombic to tetragonal with the increase of LiNbO3.The microstructure of (1-x) (K0.5Na0.5) NbO3-LiNbO3 ceramics exhibits apparent difference due to different amounts of LiNbO3. The sinterability of (1-x) (K0.5Na0.5) NbO3-LiNbO3 is improved and the sintering temperature is lower than that of pure KNN ceramics. The (1-x) (K0.5Na0.5) NbO3-LiNbO3 (x=0.06) ceramics exhibits an excellent piezoelectric properties with the piezoelectric constant d33, the electromechanical coupling coefficients kp and kt of 205pC/N, 40.3% and 49.8%, respectively.",

keywords = "(KNa) NbO-LiNbO, Lead-free piezoelectric ceramics, Perovskite structure, Piezoelectric properties",

author = "Tang, {Fu Sheng} and Du, {Hong Liang} and Liu, {Dai Jun} and Fa Luo and Zhou, {Wan Cheng}",

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T1 - Sintering characteristic and piezoelectric properties of lead-free (K0.5Na0.5)NbO3-LiNbO3 ceramics

AU - Tang, Fu Sheng

AU - Du, Hong Liang

AU - Liu, Dai Jun

AU - Luo, Fa

AU - Zhou, Wan Cheng

PY - 2007/3

Y1 - 2007/3

N2 - Lead-free (1-x)(1-x) (K0.5Na0.5) NbO3-xLiNbO3 piezoelectric ceramics were prepared by a traditional ceramic processing. The sintering characteristic, the microstructure and electrical properties of (1-x) (K0.5Na0.5) NbO3-LiNbO3 ceramics were investigated. Results show that all specimens exhibit a pure perovskite structure and the phase structure at room temperature transforms from orthorhombic to tetragonal with the increase of LiNbO3.The microstructure of (1-x) (K0.5Na0.5) NbO3-LiNbO3 ceramics exhibits apparent difference due to different amounts of LiNbO3. The sinterability of (1-x) (K0.5Na0.5) NbO3-LiNbO3 is improved and the sintering temperature is lower than that of pure KNN ceramics. The (1-x) (K0.5Na0.5) NbO3-LiNbO3 (x=0.06) ceramics exhibits an excellent piezoelectric properties with the piezoelectric constant d33, the electromechanical coupling coefficients kp and kt of 205pC/N, 40.3% and 49.8%, respectively.

AB - Lead-free (1-x)(1-x) (K0.5Na0.5) NbO3-xLiNbO3 piezoelectric ceramics were prepared by a traditional ceramic processing. The sintering characteristic, the microstructure and electrical properties of (1-x) (K0.5Na0.5) NbO3-LiNbO3 ceramics were investigated. Results show that all specimens exhibit a pure perovskite structure and the phase structure at room temperature transforms from orthorhombic to tetragonal with the increase of LiNbO3.The microstructure of (1-x) (K0.5Na0.5) NbO3-LiNbO3 ceramics exhibits apparent difference due to different amounts of LiNbO3. The sinterability of (1-x) (K0.5Na0.5) NbO3-LiNbO3 is improved and the sintering temperature is lower than that of pure KNN ceramics. The (1-x) (K0.5Na0.5) NbO3-LiNbO3 (x=0.06) ceramics exhibits an excellent piezoelectric properties with the piezoelectric constant d33, the electromechanical coupling coefficients kp and kt of 205pC/N, 40.3% and 49.8%, respectively.

KW - (KNa) NbO-LiNbO

KW - Lead-free piezoelectric ceramics

KW - Perovskite structure

KW - Piezoelectric properties

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Sintering characteristic and piezoelectric properties of lead-free (K_0.5Na_0.5)NbO₃-LiNbO₃ ceramics

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