Low electric field-induced strain and large improvement in energy density of (Lu0.5Nb0.5)4+ complex-ions doped BNT–BT ceramics

The innovative 0.94Bi 0.50 (Na 0.78 K 0.22) 0.50 Ti 1−x (Fe 0.50 Nb 0.50) x O 3-0.06BaZrO 3 (BNKTBZ-xFN) lead-free relaxor ceramics were designed and fabricated by the conventional solid-state technique. The dielectric, ferroelectric, energy storage, and impedance performance of these ceramics were investigated systematically. XRD patterns revealed that the (Fe 0.50 Nb 0.50) 4+ complex ions had completely dissolved in the lattice and constructed a single solid-solution. The addition of (Fe 0.50 Nb 0.50) 4+ complex ions had an obvious impact on the grain size and crystallinity of BNKTBZ-xFN ceramics, which led to a large dielectric breakdown strength. In addition, the degree of diffusivity (γ) for BNKTBZ-xFN ceramics were increased from ~ 1.72 to ~ 1.93, indicating an enhanced relaxor behavior with the doping of (Fe 0.50 Nb 0.50) 4+ complex ions. The highest recoverable energy density (W rec) ~ 1.20 J/cm 3 and energy-storage efficiency (η) ~ 72% were attained at 120 kV/cm for BNKTBZ-2FN ceramic with the excellent fatigue resistance. Therefore, the BNKTBZ-2FN ceramic might be a promising candidate for energy-storage electronic devices.

show abstract

“…EdP , and can be achieved using the formula = W rec ∕W [42]. The change of W, W rec , and η is presented in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…In 2016, Zhao et al [21] found that (Bi 0.5 Na 0.5 ) 0.94 Ba 0.06 TiO 3 ceramics doped by (Al 0.50 Nb 0.50 ) 4+ complex ions would enhanced electrical properties significantly. Therefore, it is rational to substitute the B-site ions of BNT-based ceramics by complex ions to improve energy-storage density [22,23]. 0.94Bi 0.5 (Na 0.…”

Section: Introductionmentioning

confidence: 99%

Enhanced recoverable energy density of 0.94Bi0.50(Na0.78K0.22)0.50Ti1−x(Fe0.50Nb0.50)xO3–0.06BaZrO3 lead-free relaxor ceramics doped by (Fe0.50Nb0.50)4+ complex ions

Wang

Yadav

et al. 2020

SN Appl. Sci.

View full text Add to dashboard Cite

show abstract

“…The phase transition peaks shifted to lower temperature from 278 to 208°C, due to the substitutions of Hf 4? for Ti 4? at the B-site that reduced B-site cation ordering [5,26,27]. Additionally, the frequency-dispersion behavior strengthened in BCNTH-0.04 ceramics.…”

Section: Resultsmentioning

confidence: 96%

Effects of CaHfO3 on the electrical properties of Bi0.49Na0.49Ca0.02TiO3 ferroelectric ceramics

Liu

Zhang

Meng

et al. 2020

J Mater Sci: Mater Electron

Self Cite

View full text Add to dashboard Cite

(1-x) (Bi 0.49 Na 0.49 Ca 0.02 TiO 3)-xCaHfO 3 (BCNTH-x, x = 0.01, 0.02, 0.03, 0.035, 0.04) systems were prepared by solid-state reaction method. Their microstructures, dielectric/piezoelectric/ferroelectric properties and impedance spectroscopy were investigated. All compositions demonstrated a single orthorhombic structure with Pbnm space group. Temperature-dependent permittivity curves displayed one anomaly, which shifts to low temperature from 278 to 208°C with increased CaHfO 3 content, because of the replacement of Hf 4? for Ti 4? at the B-site that reduced B-site cation ordering. Analysis of dielectric and ferroelectric properties indicated that a crossover from typical ferroelectrics to relaxor ferroelectrics occurred in BCNTH-0.03 and BCNTH-0.035 ceramics. The largest electrostrictive strain of 0.22% and the lowest coercive field of 37.7 kV/cm were achieved in BCNTH-0.035 and BCNTH-0.03 ceramics under 100 kV/cm, respectively. Ferroelectric domain and domain wall were fitted by impedance complexes, and the corresponding activation energy was 0.46 and 1.18 eV, which may be correlated to the combination of motion of the first ionization of oxygen vacancies and doubly ionized oxygen vacancies, respectively. 1 Introduction Piezoelectric ceramics are extensively investigated due to their wide-ranging applications in sensors, non-volatile memories, and pyroelectric detectors, among others [1]. Lead-based piezoelectric ceramics with high strain, such as Pb(Zr, Ti)O 3 [2], (Pb,La)(Zr, Ti)O 3 [3] etc. [4-6]. are commonly used. Lead-based piezoelectric materials almost dominate the market for piezoelectric materials by PZT. However, lead

show abstract

“…This high strain could be competitive with the reported values of other BNT-based materials. [27][28][29] The showed a consistent downtrend with the increase of temperature, which was a feature of ergodic relaxor phase. For x ¼ 0, the S-E curve started a butterfly shape at RT while a sharp increase of strain follows with higher temperature until little negative strain was achieved at $ 70 ○ C, approaching transition temperature from ferroelectric phase to ergodic relaxor phase (T FÀR ).…”

Section: Resultsmentioning

confidence: 99%

Large electro-strain signal of the BNT–BT–KNN lead-free piezoelectric ceramics with CuO doping

Zhao

Dai

2019

J. Adv. Dielect.

View full text Add to dashboard Cite

This paper investigates a system of 0.93[Formula: see text][Formula: see text]TiO3–0.06BaTiO3–0.01[Formula: see text][Formula: see text]NbO3–[Formula: see text]CuO (BNT–BT–KNN–[Formula: see text]CuO, [Formula: see text][Formula: see text]mol.%) ceramics, which were fabricated by the conventional solid-state process through the granulation of vacuum freeze drier. The results show that the CuO doping made a significant enhancement on the piezoelectric properties of the BNT–BT–KNN ceramics. With the doping of CuO, the transition temperature between ferroelectric phase and ergodic relaxor state is reduced to near room temperature, resulting in pinched [Formula: see text]–[Formula: see text] loops and “sprout” shape [Formula: see text]–[Formula: see text] curves. For the composition with [Formula: see text], a high unipolar strain of 0.39% under 5[Formula: see text]kV/mm contributes a large [Formula: see text][Formula: see text]pm/V at room temperature, which is competitive with the other BNT-based ceramics.

show abstract

Low electric field-induced strain and large improvement in energy density of (Lu0.5Nb0.5)4+ complex-ions doped BNT–BT ceramics

Cited by 32 publications

References 44 publications

Enhanced recoverable energy density of 0.94Bi0.50(Na0.78K0.22)0.50Ti1−x(Fe0.50Nb0.50)xO3–0.06BaZrO3 lead-free relaxor ceramics doped by (Fe0.50Nb0.50)4+ complex ions

Enhanced recoverable energy density of 0.94Bi0.50(Na0.78K0.22)0.50Ti1−x(Fe0.50Nb0.50)xO3–0.06BaZrO3 lead-free relaxor ceramics doped by (Fe0.50Nb0.50)4+ complex ions

Effects of CaHfO3 on the electrical properties of Bi0.49Na0.49Ca0.02TiO3 ferroelectric ceramics

Large electro-strain signal of the BNT–BT–KNN lead-free piezoelectric ceramics with CuO doping

Contact Info

Product

Resources

About