Fabrication of Large Aspect Ratio Ba0.85Ca0.15Zr0.1Ti0.9O3 Superfine Fibers-Based Flexible Nanogenerator Device: Synergistic Effect on Curie Temperature, Harvested Voltage, and Power

Chary, Kammari Suresh; Panda, H. S.; Prasad, C. Durga

doi:10.1021/acs.iecr.7b02182

Cited by 18 publications

(8 citation statements)

References 47 publications

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“…However, the dielectric constant and the dielectric loss in BCZT ceramics with rod-like grains reached 11,906 and 0.014, respectively. Hence, tailoring BCZT ceramics with large aspect ratio could enhance its dielectric properties [49,50].…”

Section: Dielectric and Ferroelectric Properties Of Rod-like Bczt Cmentioning

confidence: 99%

Enhanced dielectric and electrocaloric properties in lead-free rod-like BCZT ceramics

Hanani¹,

Merselmiz²,

Danine³

et al. 2020

J Adv Ceram

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Ba 0.85 Ca 0.15 Zr 0.10 Ti 0.90 O 3 (BCZT) lead-free ceramics demonstrated excellent dielectric, ferroelectric, and piezoelectric properties at the morphotropic phase boundary (MPB). So far, to study the effect of morphological changes on dielectric and ferroelectric properties in lead-free BCZT ceramics, researchers have mostly focused on the influence of spherical grain shape change. In this study, BCZT ceramics with rod-like grains and aspect ratio of about 10 were synthesized by surfactant-assisted solvothermal route. X-ray diffraction (XRD) and selected area electron diffraction (SAED) performed at room temperature confirm the crystallization of pure perovskite with tetragonal symmetry. Scanning electron microscopy (SEM) image showed that BCZT ceramics have kept the 1D rod-like grains with an average aspect ratio of about 4. Rod-like BCZT ceramics exhibit enhanced dielectric ferroelectric (ε r = 11,906, tanδ = 0.014, P r = 6.01 µC/cm², and E c = 2.46 kV/cm), and electrocaloric properties (ΔT = 0.492 K and  = 0.289 (Kmm)/kV at 17 kV/cm) with respect to spherical BCZT ceramics. Therefore, rod-like BCZT lead-free ceramics have good potential to be used in solid-state refrigeration technology. Keywords: lead-free Ba 0.85 Ca 0.15 Zr 0.10 Ti 0.90 O 3 (BCZT); rod-like Ba 0.85 Ca 0.15 Zr 0.10 Ti 0.90 O 3 (BCZT); dielectric; ferroelectric; electrocaloric effect

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Section: Dielectric and Ferroelectric Properties Of Rod-like Bczt Cmentioning

confidence: 99%

Enhanced dielectric and electrocaloric properties in lead-free rod-like BCZT ceramics

Hanani¹,

Merselmiz²,

Danine³

et al. 2020

J Adv Ceram

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“…Other perovskite structures such as Ba 0.85 Ca 0.15 Zr 0.1 Ti 0.9 O 3 (d 33 ¼ 400-600 pC N À1 ), [112] Ba 0.85 Zr 0.1 Ti 0.9 O 3 (d 33 ¼ 185 pC N À1 ), [113,114] Y 2 O 3 ÀBa(Ti 0.96 Sn 0.04 )O 3 (d 33 ¼ 454 pC N À1 ), [115] and (Na 0.82 K 0.18 ) 0.5 Bi 0.5 TiO 3 (125À157 pm V À1 ) [116] have rarely been used to convert mechanical energy to electricity. Among ferroelectric materials, alkaline niobates such as (K, Na)NbO 3 have been considered as a desirable alternate for lead-free piezoelectric devices due to their high piezoelectricity, high Curie temperature (T C ¼ 415 C), large dielectric constant, and electromechanical coupling.…”

Section: Other Pngs Based On Perovskite Micro-/nanostructuresmentioning

confidence: 99%

A Comprehensive Review on Piezoelectric Polymeric and Ceramic Nanogenerators

2022

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With the increasing concerns over global warming and the growing demands for electricity, many researchers have considered renewable and sustainable resources for electricity/power generation. [1] Photovoltaics, thermoelectric, and electromagnetic induction are among the well-established technologies for electricity generation. [2] Mechanical energy is one of the most abundant and available resources that can be harvested to generate electricity. For example, mechanical energy is available in the form of human body motion and mechanical vibration. [3][4][5][6] Piezoelectric and triboelectric nanogenerators have both been used for mechanical energy harvesting. In triboelectric nanogenerators, electrical energy originates mainly from friction or temporary contact of two different layers. However, a wide range of deformation modes like bending, stretching, and vibration can generate electricity using piezoelectric nanogenerators (PNGs). The working mechanisms of PNGs are typically easier than triboelectric nanogenerators. [7] In addition, improving electrical output and reproducibility of triboelectric nanogenerators are still challenges. [8] The use of ferroelectric materials is a promising choice for energy harvesting. Ferroelectric materials show both piezoelectric (generation of electrical power from mechanical oscillation) and pyroelectric (generation of electricity from temperature fluctuation) properties. [9,10] Piezoelectric property offers conversion of mechanical energy to electricity. By applying mechanical stress, dipole momentum forms, leading to spontaneous polarization. Consequently, the electric current flows through the piezoelectric materials as a result of charge accumulation. [11] A wide range of piezoelectric materials is used as PNGs. Piezoelectric materials can be categorized into ceramics, polymers, and piezoelectret polymers. Materials with perovskite or wurtzite nanostructures show piezoelectric properties because their crystals are noncentral symmetry. Ceramics with perovskite

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“…38 It was stated that the electrical properties and the energy storage performances are highly affected by the shape of the ferroelectric material, hence, many works have attempted to elaborate BCZT ceramics with different morphologies namely nanowires and nanofibers. [39][40][41][42][43] Zhou et al prepared BCZT nanowires (BCZT-NWs) via two-steps hydrothermal processing and found that the peak power density could be enhanced 9 times by using BCZT-NWs instead of BCZT nanoparticles. 44 In the present study, BCZT with more complex nanostructures was elaborated through sol-gel followed by twosteps hydrothermal processes.…”

Section: -29mentioning

confidence: 99%

Morphogenesis mechanisms in the hydrothermal growth of lead-free BCZT nanostructured multipods

et al. 2021

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Fabrication of Large Aspect Ratio Ba_0.85Ca_0.15Zr_0.1Ti_0.9O₃ Superfine Fibers-Based Flexible Nanogenerator Device: Synergistic Effect on Curie Temperature, Harvested Voltage, and Power

Cited by 18 publications

References 47 publications

Enhanced dielectric and electrocaloric properties in lead-free rod-like BCZT ceramics

Enhanced dielectric and electrocaloric properties in lead-free rod-like BCZT ceramics

A Comprehensive Review on Piezoelectric Polymeric and Ceramic Nanogenerators

Morphogenesis mechanisms in the hydrothermal growth of lead-free BCZT nanostructured multipods

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