A Concise Review Encircling Lead Free Porous Piezoelectric Ceramics

Pinheiro, Evelyn Derina; Thenmuhil, D.

doi:10.12693/aphyspola.136.555

Cited by 19 publications

(11 citation statements)

References 81 publications

(88 reference statements)

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“…6,7 Various methods have been developed for preparing porous ferroelectric ceramics with different internal structures; these methods include burning out polymer spheres, the polymeric sponge method, freeze casting, and three-dimensional printing. 4,8,9 Recently, films of porous…”

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confidence: 99%

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Microstructure analysis of porous lead zirconate–titanate films

et al. 2021

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Porous ferroelectric lead zirconate–titanate (PZT) films with different internal structures are synthesized using a sol–gel technique and spin‐on deposition on platinized silicon substrates. The films’ porosity is engineered using various structure‐directing agents: polyvinylpyrrolidone with a molecular weight of 360 000 (1–6.6 wt.%) and block copolymer surfactants Brij 30 and Brij 76 (30–60 wt.%). The films’ structures are characterized by transmission electron microscopy. The PVP‐based films contain large, elongated pores with diameters as large as 100 nm. By contrast, the films prepared from solutions with block copolymers exhibit a small pore size depending on the surfactant molecular weight (10–19 nm for Brij 30 and 20–27 nm for Brij 76), with a mostly uniform distribution of channel‐like pores within the film volume. Despite their highly porous structures, all of the films show a columnar‐grain perovskite structure with grains as large as several micrometers and curved grain boundaries. The films demonstrate ferroelectric behavior with dielectric hysteresis, and their permittivity decreases with increasing porosity. Thus, the Brij 30 and Brij 76 copolymer surfactants can be used to engineer fine porous structures in PZT films for various applications in electronics.

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confidence: 99%

“…Preceramic polycarbosilane polymers are commonly used as precursors to make ceramic fibers 10,39 and ceramic matrix. [7][8][9]40,41 The chemical and volume changes that accompany ceramization of the polymer during pyrolysis have been documented in several studies. For example, see Refs [39][40][41][42].…”

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confidence: 99%

Microstructure analysis of porous lead zirconate–titanate films

et al. 2021

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“…Lead‐free piezoelectric devices are biocompatible and suited for high‐temperature activities, in addition to being environmentally benign. [ 40 ]…”

Section: A Brief Introduction Of Piezoelectric Materialsmentioning

confidence: 99%

Piezoelectric Effect Polyvinylidene Fluoride (PVDF): From Energy Harvester to Smart Skin and Electronic Textiles

Feng

Zhao

Liu

et al. 2023

Adv Materials Technologies

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With the great demand for flexible self‐powered sensors and nanogenerators, polyvinylidene fluoride (PVDF) is widely investigated for outstanding piezoelectric and dielectric constant. In the pursuit for increasing β content, electrospinning is exhibited to be an effective method without external high voltage pooling or mechanical stretching and thus is considered a cost‐effective and simple method, because the molecular dipoles in the PVDF can be aligned during the process of electrospinning with high voltage field and stretching. The methods for improving piezoelectric characteristics are briefly introduced in this review, electrospinning fibers including uniaxial fibers, highly aligned fibers, core–shell fibers and Janus fibers are revealed, and research on theoretical modeling is carried out for efficiency in the design of piezoelectric nanogenerator. Last, studies on prospective applications based on electrospun PVDF and its copolymer PVDF‐TrFE, from sensors to smart skin, from energy harvesters to electronic textiles, are being conducted.

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“…At present, porous piezoelectric ceramics can be prepared by adding pore-forming agents [ 6 ], direct foaming [ 7 ], freeze casting [ 8 ], and gel casting [ 9 ]. The different morphologies of porous ceramics can be obtained, such as foam, honeycomb, and hollow spheres, and the pore sizes can be regulated within a specific range [ 10 ]. The freeze-casting method is a new process to manufacture porous piezoelectric ceramics with the advantages of a low cost, low material waste, and simplicity of the preparation process [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

Anisotropic Piezoelectric Properties of Porous (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 Ceramics with Oriented Pores through TBA-Based Freeze-Casting Method

Zhang

et al. 2022

Materials

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Porous (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 (BCZT) piezoelectric ceramics with an oriented directional hole structure were prepared by using the tertbutyl alcohol (TBA)-based freeze-casting method. The influences of sintering temperatures on the microstructure and piezoelectric properties of porous BCZT ceramics were investigated both perpendicular and parallel to the freezing direction. With the increase in sintering temperatures and the porosities decreased from 58% to 42%, the compressive strength increased from 14.0 MPa to 25.0 MPa. In addition, the d33 value of 407 pC/N for the sample sintered at 1400 °C was obtained parallel to the freezing direction, which was 1.40 times that of the other direction.

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A Concise Review Encircling Lead Free Porous Piezoelectric Ceramics

Cited by 19 publications

References 81 publications

Microstructure analysis of porous lead zirconate–titanate films

Microstructure analysis of porous lead zirconate–titanate films

Piezoelectric Effect Polyvinylidene Fluoride (PVDF): From Energy Harvester to Smart Skin and Electronic Textiles

Anisotropic Piezoelectric Properties of Porous (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 Ceramics with Oriented Pores through TBA-Based Freeze-Casting Method

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