Ferroelectric and piezoelectric properties of (Bi1/2K1/2)(ZrxTi1−                             x)O3 lead-free ceramics

Makoto Ito; Manabu Hagiwara; Shinobu Fujihara

doi:10.1016/j.matlet.2020.127776

Ferroelectric and piezoelectric properties of (Bi_1/2K_1/2)(Zr_xTi₁₋ _x)O₃ lead-free ceramics

Makoto Ito, Manabu Hagiwara, Shinobu Fujihara

Department of Applied Chemistry

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

2 Citations (Scopus)

Abstract

We report the effect of Zr substitution for Ti on the ferroelectric and piezoelectric properties of lead-free (Bi_1/2K_1/2)TiO₃ (BKT) ceramics. Dense ceramics of (Bi_1/2K_1/2)(Zr_xTi₁₋ _x)O₃ with x up to 0.06 were fabricated by sintering of hydrothermally derived fine powders. The investigation of the crystal structure and dielectric properties revealed that the Zr substitution decreased the tetragonal lattice distortion of BKT and stabilized the relaxor state. The coercive electric field was found to be decreased monotonically with increasing the Zr content, while the largest remanent polarization of 26 μC cm⁻² was observed at x = 0.04. As a result, the ceramic with x = 0.04 showed an enhanced piezoelectric d₃₃ constant of 140 pC N⁻¹.

Original language	English
Article number	127776
Journal	Materials Letters
Volume	271
DOIs	https://doi.org/10.1016/j.matlet.2020.127776
Publication status	Published - 2020 Jul 15

Keywords

Ceramics
Element substitution
Ferroelectrics
Hydrothermal synthesis
Piezoelectric materials

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1016/j.matlet.2020.127776

Cite this

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title = "Ferroelectric and piezoelectric properties of (Bi1/2K1/2)(ZrxTi1− x)O3 lead-free ceramics",

abstract = "We report the effect of Zr substitution for Ti on the ferroelectric and piezoelectric properties of lead-free (Bi1/2K1/2)TiO3 (BKT) ceramics. Dense ceramics of (Bi1/2K1/2)(ZrxTi1− x)O3 with x up to 0.06 were fabricated by sintering of hydrothermally derived fine powders. The investigation of the crystal structure and dielectric properties revealed that the Zr substitution decreased the tetragonal lattice distortion of BKT and stabilized the relaxor state. The coercive electric field was found to be decreased monotonically with increasing the Zr content, while the largest remanent polarization of 26 μC cm−2 was observed at x = 0.04. As a result, the ceramic with x = 0.04 showed an enhanced piezoelectric d33 constant of 140 pC N−1.",

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author = "Makoto Ito and Manabu Hagiwara and Shinobu Fujihara",

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T1 - Ferroelectric and piezoelectric properties of (Bi1/2K1/2)(ZrxTi1− x)O3 lead-free ceramics

AU - Ito, Makoto

AU - Hagiwara, Manabu

AU - Fujihara, Shinobu

PY - 2020/7/15

Y1 - 2020/7/15

N2 - We report the effect of Zr substitution for Ti on the ferroelectric and piezoelectric properties of lead-free (Bi1/2K1/2)TiO3 (BKT) ceramics. Dense ceramics of (Bi1/2K1/2)(ZrxTi1− x)O3 with x up to 0.06 were fabricated by sintering of hydrothermally derived fine powders. The investigation of the crystal structure and dielectric properties revealed that the Zr substitution decreased the tetragonal lattice distortion of BKT and stabilized the relaxor state. The coercive electric field was found to be decreased monotonically with increasing the Zr content, while the largest remanent polarization of 26 μC cm−2 was observed at x = 0.04. As a result, the ceramic with x = 0.04 showed an enhanced piezoelectric d33 constant of 140 pC N−1.

AB - We report the effect of Zr substitution for Ti on the ferroelectric and piezoelectric properties of lead-free (Bi1/2K1/2)TiO3 (BKT) ceramics. Dense ceramics of (Bi1/2K1/2)(ZrxTi1− x)O3 with x up to 0.06 were fabricated by sintering of hydrothermally derived fine powders. The investigation of the crystal structure and dielectric properties revealed that the Zr substitution decreased the tetragonal lattice distortion of BKT and stabilized the relaxor state. The coercive electric field was found to be decreased monotonically with increasing the Zr content, while the largest remanent polarization of 26 μC cm−2 was observed at x = 0.04. As a result, the ceramic with x = 0.04 showed an enhanced piezoelectric d33 constant of 140 pC N−1.

KW - Ceramics

KW - Element substitution

KW - Ferroelectrics

KW - Hydrothermal synthesis

KW - Piezoelectric materials

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