Phase formation and electrical properties of BNLT–BZT lead-free piezoelectric ceramic system

Kantha, Puripat; Pengpat, Kamonpan; Jarupoom, Parkpoom; Intatha, Uraiwan; Rujijanagul, Gobwute; Tunkasiri, Tawee

doi:10.1016/j.cap.2008.04.004

Cited by 61 publications

(24 citation statements)

References 14 publications

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“…3 Proposed alternatives to lead-based piezoelectric ceramics include BaTiO 3 (BT), (K,Na)NbO 3 (KNN), (Bi,Na)TiO 3 (BNT), (Ba,Ca)(Ti,Zr)O 3 (BCTZ), (Ba,Ca)(Ti,Sn)O 3 (BCTS), and (Ba,Ca) (Ti,Hf)O 3 (BCTH). [4][5][6][7] Some researchers have reported that BCTZ and BCTS ceramics can potentially replace lead-based piezoelectric ceramics because of their high piezoelectric properties. The morphotropic phase boundary (MPB) in PZT ceramics has extremely high dielectric, ferroelectric, and piezoelectric properties, which are caused by enhanced polarizability due to coupling between equivalent energy states of ferroelectric tetragonal (T) and ferroelectric rhombohedral (R) phases, making domain switching easy.…”

Section: Introductionmentioning

confidence: 99%

Enhanced temperature stability and quality factor with Hf substitution for Sn and MnO2 doping of (Ba0.97Ca0.03)(Ti0.96Sn0.04)O3 lead-free piezoelectric ceramics with high Curie temperature

et al. 2016

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In this work, the process of two-stage modifications for (Ba0.97Ca0.03)(Ti0.96Sn0.04-xHfx)O3 (BCTS4-100xH100x) ceramics was studied. The trade-off composition was obtained by Hf substitution for Sn and MnO2 doping (two-stage modification) which improves the temperature stability and piezoelectric properties. The phase structure ratio, microstructure, and dielectric, piezoelectric, ferroelectric, and temperature stability properties were systematically investigated. Results showed that BCTS4-100xH100x piezoelectric ceramics with x=0.035 had a relatively high Curie temperature (TC) of about 112 °C, a piezoelectric charge constant (d33) of 313 pC/N, an electromechanical coupling factor (kp) of 0.49, a mechanical quality factor (Qm) of 122, and a remnant polarization (Pr) of 19μC/cm2. In addition, the temperature stability of the resonant frequency (fr), kp, and aging d33 could be tuned via Hf content. Good piezoelectric temperature stability (up to 110 °C) was found with x =0.035. BCTS0.5H3.5 + a mol% Mn (BCTSH + a Mn) piezoelectric ceramics with a = 2 had a high TC of about 123 °C, kp ∼ 0.39, d33 ∼ 230 pC/N, Qm ∼ 341, and high temperature stability due to the produced oxygen vacancies. This mechanism can be depicted using the complex impedance analysis associated with a valence compensation model on electric properties. Two-stage modification for lead-free (Ba0.97Ca0.03)(Ti0.96Sn0.04)O3 ceramics suitably adjusts the compositions for applications in piezoelectric motors and actuators.

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Section: Introductionmentioning

confidence: 99%

Enhanced temperature stability and quality factor with Hf substitution for Sn and MnO2 doping of (Ba0.97Ca0.03)(Ti0.96Sn0.04)O3 lead-free piezoelectric ceramics with high Curie temperature

et al. 2016

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“…In perovskite materials, the normal and relaxor ferroelectric behaviors are exhibited in both lead-based and leadfree compounds [1][2][3][4][5][6][7]. Because their excellent piezo-/ferroelectric properties, they are promising for applications as electronic devices such as multilayer capacitors, piezoelectric sensors and actuators, and ferroelectric-based random access memories (FeRAMs) [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

The effect of BZT doping on phase formation, dielectric and ferroelectric properties of BNLT ceramics

Kantha

Pisitpipathsin

Promsawat

et al. 2015

J Mater Sci: Mater Electron

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In this work, the effect of BaZr 0.05 Ti 0.95 O 3 (BZT) doping on phase, dielectric and ferroelectric properties of a lead-free piezoelectric ceramic system of Bi 0.4871 Na 0.4871 La 0.0172 TiO 3 (BNLT) was studied. The different amounts of BZT were incorporated into BNLT to form (1-x)BNLT-xBZT ceramics (when x = 0, 0.06, 0.09 and 0.12 mol fraction). The rhombohedral phase was presented in the pure BNLT ceramic, which changed into the tetragonal phase with BZT incorporation. The lattice parameters and unit cell volume increased with increasing BZT content. Grain sizes tended to decrease with increasing BZT content. The dielectric constant of the BNLT ceramic was enhanced by BZT incorporation. The dielectric constant was maximized with the 0.09BZT incorporation. The temperature of the dielectric peak of BNLT ceramic decreased while the degree of diffuse phase transition increased with BZT substitution. The polarization-electric field (P-E) curve measured at temperature above 30°C was found to be slimmer with increasing BZT content. The remnant polarization of the BZT-incorporated ceramics decreased with increasing temperature. The observed results were believed to be caused by the lattice distortion and the enhanced cation disorders in A and B-site lattices due to the incorporation of Ba 2? and Zr 4? ions into A and B-site lattices, respectively, of BNLT perovskite structure.

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“…Barium zirconate titanate, Ba(Zr,Ti)O 3 (BZT) is a well-known stable lead-free ferroelectric material which finds many technological applications such as relaxor, [1][2][3][4][5] microwave, 6 high voltage, 7 high temperature, 8 actuator, 9 piezoelectric, [10][11][12] energy storage, 13 magnetoelectric. 14 Investigations have been taken up world-wide with different aims on the solid solutions of BZT with other materials like: (Ba,Ca)TiO 3 , [15][16][17][18][19] (Bi 1=2 Na 1=2 ÞTiO 3 , [20][21][22][23] 29 NiO, 30 Ni, 31 polyvinyl alcohol, 32 epoxy, 33 Portland cement, 34,35 etc.…”

Section: Introductionmentioning

confidence: 99%

On the high temperature phase transition in Ba(Zr0.20Ti0.80)O₃ceramic

2017

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Temperature dependent X-ray diffraction (XRD) and dielectric properties of perovskite Ba(Zr 0:2 Ti 0:8 ÞO 3 ceramic prepared using a standard solid-state reaction process is presented. Along with phase transitions at low temperature, a new phase transition at high temperature (873 C at 20 Hz), diffusive in character has been found where the lattice structure changes from monoclinic (space group: P2=mÞ to hexagonal (space group: P6=mmm). This result places present ceramic in the list of potential candidate for intended high temperature applications. The AC conductivity data followed hopping type charge conduction and supports jump relaxation model. The experimental value of d 33 ¼ 98 pC/N was found. The dependence of polarization and strain on electric field at room temperature suggested that lead-free Ba(Zr 0:2 Ti 0:8 ÞO 3 is a promising material for electrostrictive applications.

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Phase formation and electrical properties of BNLT–BZT lead-free piezoelectric ceramic system

Cited by 61 publications

References 14 publications

Enhanced temperature stability and quality factor with Hf substitution for Sn and MnO2 doping of (Ba0.97Ca0.03)(Ti0.96Sn0.04)O3 lead-free piezoelectric ceramics with high Curie temperature

Enhanced temperature stability and quality factor with Hf substitution for Sn and MnO2 doping of (Ba0.97Ca0.03)(Ti0.96Sn0.04)O3 lead-free piezoelectric ceramics with high Curie temperature

The effect of BZT doping on phase formation, dielectric and ferroelectric properties of BNLT ceramics

On the high temperature phase transition in Ba(Zr0.20Ti0.80)O₃ceramic

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Phase formation and electrical properties of BNLT–BZT lead-free piezoelectric ceramic system

Cited by 61 publications

References 14 publications

Enhanced temperature stability and quality factor with Hf substitution for Sn and MnO2 doping of (Ba0.97Ca0.03)(Ti0.96Sn0.04)O3 lead-free piezoelectric ceramics with high Curie temperature

Enhanced temperature stability and quality factor with Hf substitution for Sn and MnO2 doping of (Ba0.97Ca0.03)(Ti0.96Sn0.04)O3 lead-free piezoelectric ceramics with high Curie temperature

The effect of BZT doping on phase formation, dielectric and ferroelectric properties of BNLT ceramics

On the high temperature phase transition in Ba(Zr0.20Ti0.80)O3ceramic

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On the high temperature phase transition in Ba(Zr0.20Ti0.80)O₃ceramic