Dielectric and piezoelectric properties of MnO2-doped K0.5Na0.5Nb0.92Sb0.08O3lead-free ceramics

Dunmin Lin; Qiaoji Zheng; Kin Wing Kwok; Chenggang Xu; Chun Yang

doi:10.1007/s10854-009-9971-7

Dielectric and piezoelectric properties of MnO₂-doped K_0.5Na_0.5Nb_0.92Sb_0.08O₃lead-free ceramics

Dunmin Lin, Qiaoji Zheng, Kin Wing Kwok, Chenggang Xu, Chun Yang

Research output: Journal article publication › Journal article › Academic research › peer-review

33 Citations (Scopus)

Abstract

Lead-free MnO2-doped K0.5Na0.5Nb0.92Sb0.08O3ceramics have been fabricated by a conventional ceramic technique and their dielectric and piezoelectric properties have been studied. Our results show that a small amount of MnO2 (0.5-1.0 mol%) is enough to improve the densification of the ceramics and decrease the sintering temperature of the ceramics. The co-effects of MnO2doping and Sb-substitution lead to significant improvements in the ferroelectric and piezoelectric properties. The K0.5Na0.5Nb0.92Sb0.08O3ceramic with 0.5 mol%MnO2doping possesses optimum propeties: d33=187 pC/N, kP= 47.2%, εr= 980, tanδ = 2.71% and Tc= 287 °C. Due to high tetragonal-orthorhombic phase transition temperature (To-t∼ 150 °C), the K0.5Na0.5Nb0.92Sb0.08O3ceramic with 0.5 mol%MnO2doping exhibits a good thermal stability of piezoelectric properties.

Original language	English
Pages (from-to)	649-655
Number of pages	7
Journal	Journal of Materials Science: Materials in Electronics
Volume	21
Issue number	7
DOIs	https://doi.org/10.1007/s10854-009-9971-7
Publication status	Published - 1 Jul 2010

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1007/s10854-009-9971-7

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title = "Dielectric and piezoelectric properties of MnO2-doped K0.5Na0.5Nb0.92Sb0.08O3lead-free ceramics",

abstract = "Lead-free MnO2-doped K0.5Na0.5Nb0.92Sb0.08O3ceramics have been fabricated by a conventional ceramic technique and their dielectric and piezoelectric properties have been studied. Our results show that a small amount of MnO2 (0.5-1.0 mol%) is enough to improve the densification of the ceramics and decrease the sintering temperature of the ceramics. The co-effects of MnO2doping and Sb-substitution lead to significant improvements in the ferroelectric and piezoelectric properties. The K0.5Na0.5Nb0.92Sb0.08O3ceramic with 0.5 mol%MnO2doping possesses optimum propeties: d33=187 pC/N, kP= 47.2%, εr= 980, tanδ = 2.71% and Tc= 287 °C. Due to high tetragonal-orthorhombic phase transition temperature (To-t∼ 150 °C), the K0.5Na0.5Nb0.92Sb0.08O3ceramic with 0.5 mol%MnO2doping exhibits a good thermal stability of piezoelectric properties.",

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AU - Lin, Dunmin

AU - Zheng, Qiaoji

AU - Kwok, Kin Wing

AU - Xu, Chenggang

AU - Yang, Chun

PY - 2010/7/1

Y1 - 2010/7/1

N2 - Lead-free MnO2-doped K0.5Na0.5Nb0.92Sb0.08O3ceramics have been fabricated by a conventional ceramic technique and their dielectric and piezoelectric properties have been studied. Our results show that a small amount of MnO2 (0.5-1.0 mol%) is enough to improve the densification of the ceramics and decrease the sintering temperature of the ceramics. The co-effects of MnO2doping and Sb-substitution lead to significant improvements in the ferroelectric and piezoelectric properties. The K0.5Na0.5Nb0.92Sb0.08O3ceramic with 0.5 mol%MnO2doping possesses optimum propeties: d33=187 pC/N, kP= 47.2%, εr= 980, tanδ = 2.71% and Tc= 287 °C. Due to high tetragonal-orthorhombic phase transition temperature (To-t∼ 150 °C), the K0.5Na0.5Nb0.92Sb0.08O3ceramic with 0.5 mol%MnO2doping exhibits a good thermal stability of piezoelectric properties.

AB - Lead-free MnO2-doped K0.5Na0.5Nb0.92Sb0.08O3ceramics have been fabricated by a conventional ceramic technique and their dielectric and piezoelectric properties have been studied. Our results show that a small amount of MnO2 (0.5-1.0 mol%) is enough to improve the densification of the ceramics and decrease the sintering temperature of the ceramics. The co-effects of MnO2doping and Sb-substitution lead to significant improvements in the ferroelectric and piezoelectric properties. The K0.5Na0.5Nb0.92Sb0.08O3ceramic with 0.5 mol%MnO2doping possesses optimum propeties: d33=187 pC/N, kP= 47.2%, εr= 980, tanδ = 2.71% and Tc= 287 °C. Due to high tetragonal-orthorhombic phase transition temperature (To-t∼ 150 °C), the K0.5Na0.5Nb0.92Sb0.08O3ceramic with 0.5 mol%MnO2doping exhibits a good thermal stability of piezoelectric properties.

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Dielectric and piezoelectric properties of MnO₂-doped K_0.5Na_0.5Nb_0.92Sb_0.08O₃lead-free ceramics

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