Polyvinylpyrrolidone modified barium zirconate titanate /polyvinylidene fluoride nanocomposites as self-powered sensor

Patra, Aniket; Pal, Avijit; Sen, Shrabanee

doi:10.1016/j.ceramint.2018.03.150

Cited by 38 publications

(26 citation statements)

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“…[31] For the formation of precursor solution, the starting materials of barium acetate (Ba[CH 3 COO] 2 ) (LR grade purity), calcium nitrate tetrahydrate (Ca[NO 3 ] 2 Á4H 2 O) (AR grade purity), zirconium oxychloride octahydrate (ZrOCl 2 Á8H 2 O) (LR grade purity) and titanium isopropoxide (TTIP) were used as such without further purification. [32][33][34] Absolute ethanol and distilled water were used as a solvent. Glacial acetic acid was added as a chelating agent.…”

Section: Material/source Powdermentioning

confidence: 99%

“…[34] These white lumps were crushed using mortar and pestle, and annealed at 1000 C for 4 to 5 hours. [32][33][34]…”

Section: Material/source Powdermentioning

confidence: 99%

“…Finally, the dried film on the glass substrate has been peeled off and used for further analysis and testing as it is. [7,32,35] The thickness of pure PVDF and PVDF/BCZT composite films were measured and found to in the range 0.1 to 0.3 mm.…”

Section: Pvdf-bczt Composite Filmsmentioning

confidence: 99%

“…The dielectric permittivity of any medium depends on its electroactive content and could be related to the degree of polarization which includes all polarizations (electronic, ionic, orientational, and interfacial). [7,28,32] In PVDF/BCZT composite film, the resultant dielectric permittivity is due to (a) electroactive phase fraction of PVDF, (b) ferroelectric BCZT ceramic and, (c) interfacial interactions between the PVDF phases and BCZT ceramic particles. The value of relative permittivity (ε r ) for composite films increased with an increase in ceramic BCZT content in it ( Figure 4A).…”

Section: Dielectric Propertiesmentioning

confidence: 99%

“…[7] The dielectric loss of medium depends on polarization (dipolar, distortional, and interfacial) and conduction loss due to dc electrical conduction. [28,32] The addition of BCZT in PVDF introduces strong polarity groups derived from ionic polarization in its cell structure and, also increases the charge accumulation at the interface of ceramic particles and PVDF matrix. Moreover, with BCZT in the PVDF matrix, the long polymer chains were separated into smaller domains affecting the overall conductive network.…”

Section: Dielectric Propertiesmentioning

confidence: 99%

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Modulation in polymer properties in PVDF/BCZT composites with ceramic content and their energy density capabilities

et al. 2020

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The lead-free 0.5((Ba 0.7 Ca 0.3)TiO 3)-0.5(Ba(Zr 0.2 Ti 0.8))O 3 (BCZT) piezoceramics were synthesized using sol-gel method. The Rietveld analysis of X-ray diffraction (XRD) data and differential scanning calorimetry (DSC) studies of as-synthesized BCZT powder suggests the coexistence of ferroelectric orthorhombic (O) and tetragonal (T) phases at room temperature (RT). The value of curie temperature (T T-C) as depicted from DSC and dielectric studies was found to be ≈ 110 C. The BCZT ceramic particles were dispersed in the polyvinylidene fluoride (PVDF) matrix, an electroactive polymer with great ferro/piezoelectric response in its distinct β and γ phases, to form ferroelectric ceramic-polymer composites for their applications in flexible energy storage capacitors. The present work reports the Fourier-transform infrared spectroscopy (FTIR), XRD, dielectric, ferroelectric, and energy density properties of PVDF/BCZT composite films having different wt% of BCZT content fabricated by the solution-cast technique. The FTIR and XRD studies depict the γ-PVDF and pure BCZT phases in composite films. The dielectric studies estimated the relative permittivity (ε r) of a composite film with 50 wt% of BCZT content to be ≈ 31 (at 120 Hz) which was about three times as compared with that of pure PVDF. The dielectric loss (tan δ) was maximum ≈ 0.15 (at 120 Hz) for 50 wt % BCZT composition. The ferroelectric studies and energy storage calculations showed that the value of remnant polarization (P r), coercive field (E c) and energy storage density (W) attain the maximum value of 0.63 μC/cm 2 , 35.22 kV/cm, and 70.46 mJ/cm 3 , respectively for the film sample having 40 wt% BCZT content. The maximum energy storage efficiency, η (%) is calculated to be ≈ 60 for 50 wt% BCZT composition. The results indicated that the incorporation of BCZT particles

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Section: Material/source Powdermentioning

confidence: 99%

“…[34] These white lumps were crushed using mortar and pestle, and annealed at 1000 C for 4 to 5 hours. [32][33][34]…”

Section: Material/source Powdermentioning

confidence: 99%

Section: Pvdf-bczt Composite Filmsmentioning

confidence: 99%

Section: Dielectric Propertiesmentioning

confidence: 99%

Section: Dielectric Propertiesmentioning

confidence: 99%

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Modulation in polymer properties in PVDF/BCZT composites with ceramic content and their energy density capabilities

et al. 2020

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High‐Performance Flexible Piezoelectric Nanogenerator Based on Specific 3D Nano BCZT@Ag Hetero‐Structure Design for the Application of Self‐Powered Wireless Sensor System

Shi

Chen

et al. 2021

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that people pursued are independent, sustainable, and maintenance free for power supply unit. However, these devices are still mainly powered by traditional batteries. The problems of battery power, such as replacement and waste disposal of battery, not only cause a lot of inconvenience to maintain devices, but also have a negative impact on environmental protection, which runs counter to people's design ideal. Therefore, the energy harvesting technique for self-powered device provides an effective pathway that could replace traditional battery power in IOT. [5][6][7][8][9] The piezoelectric nanogenerator (PENG) can realize the conversion of mechanical energy to electrical energy based on piezoelectric effect, which can harvest mechanical energy and produce electrical output under the mechanical stimulation, such as compression, tension, and twist. Compared with triboelectric generator, PENG has the advantages of little influence by environmental factors, long service life, and stable output performance, which has been considered as promising in the approach of IOT and self-powered sensors network. [10][11][12][13][14] However, the output performance of PENG is generally lower than as expected, and further research is needed to improve the performance of PENG.In general, the flexible PENG based on inorganic/organic composites is usually composed of piezoelectric ceramic fillers and polymer materials due to the composites can combine the favorable piezoelectric response of ceramics and excellent flexibility of polymer. For improving the performance of PENG, the most direct and effective way is to select doped ceramics with good piezoelectric performance. Up to present, there are various types of piezoelectric ceramic systems, such as Pb(Zr 1-x Ti x )O 3 (PZT), (K 0.5 Na 0.5 )NbO 3 (KNN), (Bi 0.5 Na 0.5 )TiO 3 (BNT), and BaTiO 3 (BT). [15][16][17][18][19][20] Among them, the Pb based piezoelectric ceramics have been widely applied in industry for decades, which attributes to their excellent and stable piezoelectric properties. However, with the requirement for environmentfriendly, the exploration of lead-free piezo-ceramics as inorganic fillers in flexible PENG has been in progress. The low-cost BT With the popularity of portable and miniaturized electronic devices in people's live, flexible piezoelectric nanogenerators (PENG) have become a research hotspot for harvesting energy from the living environment to power smallscale electronic equipment and systems because of its stability. For further enhancing output performance of PENG, chemical modification and structural design for piezoelectric fillers are effective ways. Thus, the 3D porous heterostructure fillers of BCZT@Ag are prepared by freeze-drying method and subsequent chemical seeding reduction. The silicone rubber as matrix is filled into the micro-voids of fillers to prepare specialized composite. The charge transport mechanism and stress transfer efficiency in PENG can be effectively improved through specialized design which is proven by experimental res...

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Introduction and Literature Review

Mokhtari

2022

Springer Theses

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Polyvinylpyrrolidone modified barium zirconate titanate /polyvinylidene fluoride nanocomposites as self-powered sensor

Cited by 38 publications

References 30 publications

Modulation in polymer properties in PVDF/BCZT composites with ceramic content and their energy density capabilities

Modulation in polymer properties in PVDF/BCZT composites with ceramic content and their energy density capabilities

High‐Performance Flexible Piezoelectric Nanogenerator Based on Specific 3D Nano BCZT@Ag Hetero‐Structure Design for the Application of Self‐Powered Wireless Sensor System

Introduction and Literature Review

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