Electromechanical and ferroelectric properties of (Bi1/2Na 1/2)TiO3-(Bi1/2K1/2)TiO 3- (Bi1/2Li1/2)TiO3-BaTiO 3 lead-free piezoelectric ceramics for accelerometer application

S. H. Choy; X. X. Wang; H. L.W. Chan; C. L. Choy

doi:10.1007/s00339-007-4170-y

Electromechanical and ferroelectric properties of (Bi_1/2Na _1/2)TiO₃-(Bi_1/2K_1/2)TiO ₃- (Bi_1/2Li_1/2)TiO₃-BaTiO ₃ lead-free piezoelectric ceramics for accelerometer application

S. H. Choy, X. X. Wang, H. L.W. Chan, C. L. Choy

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

42 Citations (Scopus)

Abstract

Lead-free (0.90-x)(Bi_1/2Na_1/2)TiO₃-0. 05(Bi_1/2K_1/2)TiO₃-x(Bi_1/2Li _1/2)TiO₃-0.05BaTiO₃ piezoelectric ceramics (abbreviated as BNKLBT-100x, with x ranged from 0 to 2.5 mol∈%) were prepared by a conventional mixed oxide method. Effects of the amount of (Bi _1/2Li_1/2)TiO₃ (BLT) on the electrical properties and crystal structure of the BNKLBT ceramics were examined. BNKLBT-1.5 ceramics have good properties with piezoelectric constant d ₃₃=163 pC/N, electromechanical coupling factor k_p=0.33, k_t=0.53, relative permittivity ε_r=785 and dissipation factor cosδ=2.2% at 1 kHz. The sample has larger remnant polarization than BNKLBT-0 ceramics and the same coercive field as BNKLBT-0 ceramics. X-ray diffraction analysis shows that the incorporated BLT diffuses into the BNT-BKT-BT lattice to form a solid solution during sintering, but changes the crystal structure from rhombohedral to tetragonal symmetry at higher BLT amounts. Depolarization temperature (T_d) of the BNKLBT-100x ceramics increases from 102 °C to ∼ 136 °C for BNKLBT-0 to BNKLBT-2.5. BNKLBT-1.5 is used as the transduction element in compressive type accelerometer and its sensitivity is calibrated by the back-to back method. Within the ±2.5% tolerance, the lead-free accelerometer has a mean value of 2.97 pC/ms^-2 within 50 Hz-12.45 kHz and the lead-based accelerometer has a mean value of 4.34 pC/ms^-2 within 50 Hz to 8.24 kHz.

Original language	English
Pages (from-to)	775-781
Number of pages	7
Journal	Applied Physics A: Materials Science and Processing
Volume	89
Issue number	3
DOIs	https://doi.org/10.1007/s00339-007-4170-y
Publication status	Published - 1 Nov 2007

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Chemistry(all)
Materials Science(all)

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@article{74240dafd95146a28ddca93a05f6b49b,

title = "Electromechanical and ferroelectric properties of (Bi1/2Na 1/2)TiO3-(Bi1/2K1/2)TiO 3- (Bi1/2Li1/2)TiO3-BaTiO 3 lead-free piezoelectric ceramics for accelerometer application",

abstract = "Lead-free (0.90-x)(Bi1/2Na1/2)TiO3-0. 05(Bi1/2K1/2)TiO3-x(Bi1/2Li 1/2)TiO3-0.05BaTiO3 piezoelectric ceramics (abbreviated as BNKLBT-100x, with x ranged from 0 to 2.5 mol∈%) were prepared by a conventional mixed oxide method. Effects of the amount of (Bi 1/2Li1/2)TiO3 (BLT) on the electrical properties and crystal structure of the BNKLBT ceramics were examined. BNKLBT-1.5 ceramics have good properties with piezoelectric constant d 33=163 pC/N, electromechanical coupling factor kp=0.33, kt=0.53, relative permittivity εr=785 and dissipation factor cosδ=2.2% at 1 kHz. The sample has larger remnant polarization than BNKLBT-0 ceramics and the same coercive field as BNKLBT-0 ceramics. X-ray diffraction analysis shows that the incorporated BLT diffuses into the BNT-BKT-BT lattice to form a solid solution during sintering, but changes the crystal structure from rhombohedral to tetragonal symmetry at higher BLT amounts. Depolarization temperature (Td) of the BNKLBT-100x ceramics increases from 102 °C to ∼ 136 °C for BNKLBT-0 to BNKLBT-2.5. BNKLBT-1.5 is used as the transduction element in compressive type accelerometer and its sensitivity is calibrated by the back-to back method. Within the ±2.5% tolerance, the lead-free accelerometer has a mean value of 2.97 pC/ms-2 within 50 Hz-12.45 kHz and the lead-based accelerometer has a mean value of 4.34 pC/ms-2 within 50 Hz to 8.24 kHz.",

author = "Choy, {S. H.} and Wang, {X. X.} and Chan, {H. L.W.} and Choy, {C. L.}",

year = "2007",

month = nov,

day = "1",

doi = "10.1007/s00339-007-4170-y",

language = "English",

volume = "89",

pages = "775--781",

journal = "Applied Physics A: Materials Science and Processing",

issn = "0947-8396",

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Electromechanical and ferroelectric properties of (Bi_1/2Na _1/2)TiO₃-(Bi_1/2K_1/2)TiO ₃- (Bi_1/2Li_1/2)TiO₃-BaTiO ₃ lead-free piezoelectric ceramics for accelerometer application. / Choy, S. H.; Wang, X. X.; Chan, H. L.W. et al.
In: Applied Physics A: Materials Science and Processing, Vol. 89, No. 3, 01.11.2007, p. 775-781.

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

TY - JOUR

T1 - Electromechanical and ferroelectric properties of (Bi1/2Na 1/2)TiO3-(Bi1/2K1/2)TiO 3- (Bi1/2Li1/2)TiO3-BaTiO 3 lead-free piezoelectric ceramics for accelerometer application

AU - Choy, S. H.

AU - Wang, X. X.

AU - Chan, H. L.W.

AU - Choy, C. L.

PY - 2007/11/1

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N2 - Lead-free (0.90-x)(Bi1/2Na1/2)TiO3-0. 05(Bi1/2K1/2)TiO3-x(Bi1/2Li 1/2)TiO3-0.05BaTiO3 piezoelectric ceramics (abbreviated as BNKLBT-100x, with x ranged from 0 to 2.5 mol∈%) were prepared by a conventional mixed oxide method. Effects of the amount of (Bi 1/2Li1/2)TiO3 (BLT) on the electrical properties and crystal structure of the BNKLBT ceramics were examined. BNKLBT-1.5 ceramics have good properties with piezoelectric constant d 33=163 pC/N, electromechanical coupling factor kp=0.33, kt=0.53, relative permittivity εr=785 and dissipation factor cosδ=2.2% at 1 kHz. The sample has larger remnant polarization than BNKLBT-0 ceramics and the same coercive field as BNKLBT-0 ceramics. X-ray diffraction analysis shows that the incorporated BLT diffuses into the BNT-BKT-BT lattice to form a solid solution during sintering, but changes the crystal structure from rhombohedral to tetragonal symmetry at higher BLT amounts. Depolarization temperature (Td) of the BNKLBT-100x ceramics increases from 102 °C to ∼ 136 °C for BNKLBT-0 to BNKLBT-2.5. BNKLBT-1.5 is used as the transduction element in compressive type accelerometer and its sensitivity is calibrated by the back-to back method. Within the ±2.5% tolerance, the lead-free accelerometer has a mean value of 2.97 pC/ms-2 within 50 Hz-12.45 kHz and the lead-based accelerometer has a mean value of 4.34 pC/ms-2 within 50 Hz to 8.24 kHz.

AB - Lead-free (0.90-x)(Bi1/2Na1/2)TiO3-0. 05(Bi1/2K1/2)TiO3-x(Bi1/2Li 1/2)TiO3-0.05BaTiO3 piezoelectric ceramics (abbreviated as BNKLBT-100x, with x ranged from 0 to 2.5 mol∈%) were prepared by a conventional mixed oxide method. Effects of the amount of (Bi 1/2Li1/2)TiO3 (BLT) on the electrical properties and crystal structure of the BNKLBT ceramics were examined. BNKLBT-1.5 ceramics have good properties with piezoelectric constant d 33=163 pC/N, electromechanical coupling factor kp=0.33, kt=0.53, relative permittivity εr=785 and dissipation factor cosδ=2.2% at 1 kHz. The sample has larger remnant polarization than BNKLBT-0 ceramics and the same coercive field as BNKLBT-0 ceramics. X-ray diffraction analysis shows that the incorporated BLT diffuses into the BNT-BKT-BT lattice to form a solid solution during sintering, but changes the crystal structure from rhombohedral to tetragonal symmetry at higher BLT amounts. Depolarization temperature (Td) of the BNKLBT-100x ceramics increases from 102 °C to ∼ 136 °C for BNKLBT-0 to BNKLBT-2.5. BNKLBT-1.5 is used as the transduction element in compressive type accelerometer and its sensitivity is calibrated by the back-to back method. Within the ±2.5% tolerance, the lead-free accelerometer has a mean value of 2.97 pC/ms-2 within 50 Hz-12.45 kHz and the lead-based accelerometer has a mean value of 4.34 pC/ms-2 within 50 Hz to 8.24 kHz.

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DO - 10.1007/s00339-007-4170-y

M3 - Journal article

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SN - 0947-8396

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SP - 775

EP - 781

JO - Applied Physics A: Materials Science and Processing

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Electromechanical and ferroelectric properties of (Bi_1/2Na _1/2)TiO₃-(Bi_1/2K_1/2)TiO ₃- (Bi_1/2Li_1/2)TiO₃-BaTiO ₃ lead-free piezoelectric ceramics for accelerometer application

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