Morphotropic phase boundary and electrical properties of 1−x[Bi0.5Na0.5]TiO3 –xBa[Zr0.25Ti0.75]O3 lead-free piezoelectric ceramics

Parija, B.; Badapanda, T.; Rout, S. K.; Cavalcante, L. S.; Panigrahi, S.; Longo, Elson; Batista, N. C.; Sinha, T. P.

doi:10.1016/j.ceramint.2012.11.080

Cited by 53 publications

(11 citation statements)

References 54 publications

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“…In general, the observed characteristics are in good agreement with previous reports of BNT [38], and BNT-based binary ceramic systems such as BNT-BT [40,41,43], BNT-BKT [39,44], and BNT-BZT [45]. …”

Section: Resultssupporting

confidence: 91%

Comparative Study of Ferroelectric and Piezoelectric Properties of BNT-BKT-BT Ceramics near the Phase Transition Zone

et al. 2018

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We report a comprehensive comparative study of ferroelectric and piezoelectric properties of BNT-BKT-BT ceramics through the MPB (morphotropic phase boundary) zone, from the rhombohedral to the tetragonal phases in the system (97.5−x)(Bi0.5Na0.5)TiO3 + x(Bi0.5K0.5)TiO3 + 2.5(BaTiO3), where x = 0 to 24.5 mol %. The structural transitions were studied by XRD patterns and Raman spectra. The MPB was confirmed between x = 10 and 12.5 mol % BKT. The dielectric/ferroelectric/piezoelectric properties of the BNT-BKT-BT system are maximized in the MPB region exhibiting a dielectric constant of 1506, a remanent polarization of 34.4 μC/cm2, a coercive field = 36.9 kV/cm, and piezoelectric values of d33 = 109 pC/N, kt = 0.52, and kp = 0.24. Changes in microstructure as a function of BKT content are also presented and discussed.

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Section: Resultssupporting

confidence: 91%

Comparative Study of Ferroelectric and Piezoelectric Properties of BNT-BKT-BT Ceramics near the Phase Transition Zone

et al. 2018

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“…. The Raman data were consistent with previous reports . The spectra were deconvoluted as indicated with dashed lines according to eight Gaussian–Lorentzian modes following the related literature .…”

Section: Resultssupporting

confidence: 78%

“…The assignment of spectral modes to specific vibrations in the crystal lattice was superimposed on the graph. Three main active modes were perceived in the BNKT–BST system from 100 to 700 cm −1 , which were identical to other BNT‐based ceramics . Three main regions superimposed on the graph include: (1) the mode associated with vibrations of the perovskite A‐site for wave numbers ≤150 cm −1 ; (2) the mode associated with Ti–O vibrations centered around 260 cm −1 ; and (3) the mode corresponding to TiO 6 octahedra vibration over the wave number range of 450–650 cm −1 .…”

Section: Resultsmentioning

confidence: 62%

“…The Raman‐active mode at around 542 cm −1 is ascribed to symmetric stretching vibrations of the octrahedral [TiO 6 ] cluster. This mode is common in materials with a perovskite‐type structure . With increasing concentration of BST, minor variations in the Raman data were observed.…”

Section: Resultsmentioning

confidence: 89%

“…Obviously, the overall spectral signature is characterized by relatively broad features, which are a consequence of A‐site disorder and the overlapping of Raman modes. The first Raman‐active A 1 (TO 1 ) mode at around 146 cm −1 is related to the network modifier or distorted octahedral [BiO 6 ], [KO 6 ], and [NaO 6 ] clusters . The second Raman‐active Ti–O mode at around 279 cm −1 can be assigned to stretching from the bonds due to the presence of the octrahedral [TiO 6 ] cluster at short range.…”

Section: Resultsmentioning

confidence: 99%

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Lead‐Free (Ba_0.70Sr_0.30)TiO₃‐Modified Bi_0.5(Na_0.80K_0.20)_0.5TiO₃ Ceramics with Large Electric Field–Induced Strains

et al. 2016

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The dielectric, ferroelectric, and electric field-induced strain behavior of Bi 0.5 (Na 0.80 K 0.20 ) 0.5 TiO 3 (BNKT) ceramics modified with (Ba 0.70 Sr 0.30 )O 3 (BST) were investigated as a function of composition and temperature. The ceramic samples were synthesized by a solid-state mixed oxide method and sintered at 1125°C for 2 h. The XRD and Raman spectra showed coexisting rhombohedral and tetragonal phases throughout the entire compositional range with the tetragonal phase becoming dominant at higher BST concentrations. For all compositions, the temperature dependence of the dielectric spectra revealed a frequency dependence that is characteristic of a relaxor mechanism. This suggests that these ceramics lacked long-range order and it appears that the maximum disorder was observed for the composition with 5 mol% BST (BNKT-0.05BST sample). This was evidenced by the observation of pinched hysteresis loops, even at room temperature, and a significant decrease in the P r and E c values which resulted in large electric field-induced strains (S max ) of 0.40% and a normalized strain coefficient (d * 33 = S max /E max ) of 732 pm/V. This significant strain enhancement at the composition of x = 0.05 may be attributed to both a composition-induced structural phase transition and a field-induced relaxor to ferroelectric phase transition.

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Design of Self‐Powered Sensors with Excellent Thermal and UV–Light Detections by 0.94(Bi_0.5Na_0.5)TiO₃‐0.06Ba(Zr_0.25Ti_0.75)O₃ Nanoparticles

Zhao

Zhang

Meng

et al. 2022

Adv Funct Materials

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Ferroelectric materials provide a new pathway to convert thermal energy into electricity based on the pyroelectric effect. How to modulate the pyroelectric property of ferroelectric materials through UV–light is still an urgent problem that needs to be solved. Here, a self‐powered sensor is demonstrated based on 0.94(Bi0.5Na0.5)TiO3‐0.06Ba(Zr0.25Ti0.75)O3 nanoparticles, exhibiting high output electric performance under temperature variation and UV–light illumination conditions. Compared with a purely pyroelectric system, the corresponding current peaks of “UV–light + heating” and “UV–light + cooling” states are 88.6% higher and 37.3% smaller in the coupled system. The fabricated pyroelectric system shows excellent performance with detection sensitivities of 0.9 (heating) and 1.48 nA K−1 (cooling) with 0.7 × 10−3 and 0.2 × 10−3 nA lux−1 illuminated by 395 nm UV–light as a temperature sensor. Furthermore, a self‐powered sensor that is suitable for detecting both UV–light and temperature variations by recording the output current signals are demonstrated, which provides a basis for the development of the next generation of UV–light‐modulated ferroelectric devices.

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Morphotropic phase boundary and electrical properties of 1−x[Bi0.5Na0.5]TiO3 –xBa[Zr0.25Ti0.75]O3 lead-free piezoelectric ceramics

Cited by 53 publications

References 54 publications

Comparative Study of Ferroelectric and Piezoelectric Properties of BNT-BKT-BT Ceramics near the Phase Transition Zone

Comparative Study of Ferroelectric and Piezoelectric Properties of BNT-BKT-BT Ceramics near the Phase Transition Zone

Lead‐Free (Ba_0.70Sr_0.30)TiO₃‐Modified Bi_0.5(Na_0.80K_0.20)_0.5TiO₃ Ceramics with Large Electric Field–Induced Strains

Design of Self‐Powered Sensors with Excellent Thermal and UV–Light Detections by 0.94(Bi_0.5Na_0.5)TiO₃‐0.06Ba(Zr_0.25Ti_0.75)O₃ Nanoparticles

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Morphotropic phase boundary and electrical properties of 1−x[Bi0.5Na0.5]TiO3 –xBa[Zr0.25Ti0.75]O3 lead-free piezoelectric ceramics

Cited by 53 publications

References 54 publications

Comparative Study of Ferroelectric and Piezoelectric Properties of BNT-BKT-BT Ceramics near the Phase Transition Zone

Comparative Study of Ferroelectric and Piezoelectric Properties of BNT-BKT-BT Ceramics near the Phase Transition Zone

Lead‐Free (Ba0.70Sr0.30)TiO3‐Modified Bi0.5(Na0.80K0.20)0.5TiO3 Ceramics with Large Electric Field–Induced Strains

Design of Self‐Powered Sensors with Excellent Thermal and UV–Light Detections by 0.94(Bi0.5Na0.5)TiO3‐0.06Ba(Zr0.25Ti0.75)O3 Nanoparticles

Contact Info

Product

Resources

About

Lead‐Free (Ba_0.70Sr_0.30)TiO₃‐Modified Bi_0.5(Na_0.80K_0.20)_0.5TiO₃ Ceramics with Large Electric Field–Induced Strains

Design of Self‐Powered Sensors with Excellent Thermal and UV–Light Detections by 0.94(Bi_0.5Na_0.5)TiO₃‐0.06Ba(Zr_0.25Ti_0.75)O₃ Nanoparticles