scholarly journals Particle Size Effect of Lanthanum-Modified Bismuth Titanate Ceramics on Ferroelectric Effect for Energy Harvesting

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Sangmo Kim ◽  
Thi My Huyen Nguyen ◽  
Rui He ◽  
Chung Wung Bark
Keyword(s):  
Particle Size ◽  
Energy Harvesting ◽  
High Speed ◽  
High Performance ◽  
Bismuth Titanate ◽  
Vinylidene Fluoride ◽  
Piezoelectric Materials ◽  
Renewable Energy Sources ◽  
Particle Size Effect ◽  
Ferroelectric Materials

AbstractPiezoelectric nanogenerators (PNGs) have been studied as renewable energy sources. PNGs consisting of organic piezoelectric materials such as poly(vinylidene fluoride) (PVDF) containing oxide complex powder have attracted much attention for their stretchable and high-performance energy conversion. In this study, we prepared a PNG combined with PVDF and lanthanum-modified bismuth titanate (Bi4−XLaXTi3O12, BLT) ceramics as representative ferroelectric materials. The inserted BLT powder was treated by high-speed ball milling and its particle size reduced to the nanoscale. We also investigated the effect of particle size on the energy-harvesting performance of PNG without polling. As a result, nano-sized powder has a much larger surface area than micro-sized powder and is uniformly distributed inside the PNG. Moreover, nano-sized powder-mixed PNG generated higher power energy (> 4 times) than the PNG inserted micro-sized powder.

scholarly journals Innovation Strategy Selection Facilitates High-Performance Flexible Piezoelectric Sensors

Sensors ◽  
2020 ◽  
Vol 20 (10) ◽  
pp. 2820 ◽  
Author(s):  
Shengshun Duan ◽  
Jun Wu ◽  
Jun Xia ◽  
Wei Lei
Keyword(s):  
Power Consumption ◽  
High Performance ◽  
Chemical Elements ◽  
Piezoelectric Materials ◽  
Polymer Nanocomposite ◽  
Ferroelectric Materials ◽  
Piezoelectric Sensors ◽  
Piezoelectric Polymer ◽  
Piezotronic Effect ◽  
Electronic Sensors

Piezoelectric sensors with high performance and low-to-zero power consumption meet the growing demand in the flexible microelectronic system with small size and low power consumption, which are promising in robotics and prosthetics, wearable devices and electronic skin. In this review, the development process, application scenarios and typical cases are discussed. In addition, several strategies to improve the performance of piezoelectric sensors are summed up: (1) material innovation: from piezoelectric semiconductor materials, inorganic piezoceramic materials, organic piezoelectric polymer, nanocomposite materials, to emerging and promising molecular ferroelectric materials. (2) designing microstructures on the surface of the piezoelectric materials to enlarge the contact area of piezoelectric materials under the applied force. (3) addition of dopants such as chemical elements and graphene in conventional piezoelectric materials. (4) developing piezoelectric transistors based on piezotronic effect. In addition, the principle, advantages, disadvantages and challenges of every strategy are discussed. Apart from that, the prospects and directions of piezoelectric sensors are predicted. In the future, the electronic sensors need to be embedded in the microelectronic systems to play the full part. Therefore, a strategy based on peripheral circuits to improve the performance of piezoelectric sensors is proposed in the final part of this review.

scholarly journals Recent Reports of Magneto-Mechano-Electric Conversion Composites

Ceramist ◽  
2021 ◽  
Vol 24 (3) ◽  
pp. 248-259
Author(s):  
Geon-Tae Hwang ◽  
Jungho Ryu ◽  
Woon-Ha Yoon
Keyword(s):  
Energy Harvesting ◽  
Material Properties ◽  
High Performance ◽  
Piezoelectric Materials ◽  
Research Progress ◽  
Application System ◽  
Magnetic Sensing ◽  
Research Teams ◽  
Device Structures ◽  
Magnetic And Electric Properties

Magneto-mechano-electric (MME) conversion composites composed of distinctive magnetostrictive and piezoelectric materials derive interfacial coupling of magnetoelectric conversion between magnetic and electric properties, thus enabling energy harvesting and magnetic sensing. To demonstrate high-performance MME composites and their applications, various research teams have studied tailoring device structures, enhancing material properties, and developing MME application system. This article reviews the recent research progress of MME composites for energy harvesting and magnetic sensing.

Recent advances in flexible PVDF based piezoelectric polymer devices for energy harvesting applications

2020 ◽  
pp. 1045389X2096605
Author(s):  
Sunija Sukumaran ◽  
Samir Chatbouri ◽  
Didier Rouxel ◽  
Etienne Tisserand ◽  
Frédéric Thiebaud ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Recent Progress ◽  
Vinylidene Fluoride ◽  
Piezoelectric Materials ◽  
Mechanical Energy ◽  
Electronic Devices ◽  
Electrical Energy ◽  
Electronic Circuits ◽  
Power Sources ◽  
Research Activities

Energy harvesting is one of the most promising research areas to produce sustainable power sources from the ambient environment. Which found applications to attain the extensive lifetime self-powered operations of various devices such as MEMS wireless sensors, medical implants and wearable electronic devices. Piezoelectric nanogenerators can efficiently convert the vastly available mechanical energy into electrical energy to meet the requirements of low-powered electronic devices. Among the piezoelectric materials, poly (vinylidene fluoride) (PVDF) and its copolymers are extensively studied for the development of energy harvesting devices. Due to the outstanding properties such as high flexibility, ease of processing, long-term stability, biocompatibility makes them a promising candidate for piezoelectric generators. Nevertheless, compared to piezoceramic materials, PVDF based generators produce lower piezoresponse. Over the last decades, tremendous research activities have been reported to endorse the performance of PVDF based energy harvesters. This review article mainly focused on the recent progress in the performance improvement with processing methods, piezoelectric materials, different filler loading. The new developments and design structures will lead to an increase in piezoelectricity, alignment of dipoles, dielectric properties and subsequently enhance the output performance of the device. Electronic circuits play a vital role in energy harvesting to efficiently collect the developed charge from the device. Here, we have proposed a detailed description of the electronic circuits. Also, in the application part deals with the recent progress in flexible, biomedical and hybrid generators based on PVDF polymers.

Flexible and Lead-free BCZT Thin Film Nanogenerator for Biocompatible Energy Harvesting

2021 ◽  
Author(s):  
Shiyuan Liu ◽  
Zhuomin Zhang ◽  
Yao Shan ◽  
Ying Hong ◽  
Fatma Farooqui ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Energy Harvesting ◽  
Medical Devices ◽  
High Performance ◽  
Piezoelectric Materials ◽  
Lead Free ◽  
Piezoelectric Thin Films

High-performance piezoelectric thin films generally contain toxic lead that limits the application scenarios especially on wearable and medical devices. Alternative lead-free piezoelectric materials such as Ba0.85Ca0.15-Zr0.1Ti0.9O3 (BCZT) have been proved...

scholarly journals Comparative Analysis of Modelling for Piezoelectric Energy Harvesting Solutions

2021 ◽  
Vol 3 (2) ◽  
pp. 138-153
Author(s):  
Jennifer S Raj ◽  
G Ranganathan
Keyword(s):  
Energy Harvesting ◽  
Alternative Energy ◽  
Piezoelectric Materials ◽  
Mechanical Energy ◽  
Renewable Energy Sources ◽  
Energy Systems ◽  
Piezoelectric Energy ◽  
Research Article ◽  
Piezoelectric Elements ◽  
Harvesting Techniques

Due to the global energy crisis and environmental degradation, largely as a result of the increased usage of non-renewable energy sources, researchers have become more interested in exploring alternative energy systems, which may harvest energy from natural sources. This research article provides a comparison between various modeling of piezoelectric elements in terms of power generation for energy harvesting solutions. The energy harvesting can be computed and calculated based on piezoelectric materials and modeling for the specific application. The most common type of environmental energy that may be collected and transformed into electricity for several purposes is Piezoelectric transduction, which is more effective, compared to other mechanical energy harvesting techniques, including electrostatic, electromagnetic, and triboelectric transduction, due to their high electromechanical connection factor and piezoelectric coefficients. As a result of this research, scientists are highly interested in piezoelectric energy collection.

Energy-collision-aware Minimum Latency Aggregation Scheduling for Energy-harvesting Sensor Networks

2021 ◽  
Vol 17 (4) ◽  
pp. 1-34
Author(s):  
Quan Chen ◽  
Zhipeng Cai ◽  
Lianglun Cheng ◽  
Hong Gao ◽  
Jianzhong Li
Keyword(s):  
Sensor Networks ◽  
Energy Harvesting ◽  
Data Aggregation ◽  
High Performance ◽  
Renewable Energy Sources ◽  
Residual Energy ◽  
Interference Model ◽  
Energy Collision ◽  
Minimum Latency ◽  
Physical Interference Model

The emerging energy-harvesting technology enables charging sensor batteries with renewable energy sources, which has been effectively integrated into Wireless Sensor Networks (EH-WSNs). Due to the limited energy-harvesting capacities of tiny sensors, the captured energy remains scarce and differs greatly among nodes, which makes the data aggregation scheduling problem more challenging than that in energy-abundant WSNs. In this article, we investigate the Minimum Latency Aggregation Scheduling (MLAS) problem in EH-WSNs. First, we identify a new kind of collision in EH-WSNs, named as energy-collision, and design several special structures to avoid it during data aggregation. To reduce the latency, we try to choose the parent adaptively according to nodes’ transmission tasks and energy-harvesting ability, under the consideration of collisions avoidance. By considering transmitting time, residual energy, and energy-collision, three scheduling algorithms are proposed under protocol interference model. Under physical interference model, several approximate algorithms are also designed by taking account of the interference from the nodes several hops away. Finally, the theoretical analysis and simulation results verify that the proposed algorithms have high performance in terms of latency.

Ferroelectric Films-Growth, Properties and Applications

1990 ◽  
Vol 200 ◽  
Author(s):  
M.H. Francombe ◽  
S.V. Krisknaswamy
Keyword(s):  
High Performance ◽  
Recent Progress ◽  
Bismuth Titanate ◽  
Piezoelectric Materials ◽  
Structure And Properties ◽  
Ferroelectric Films ◽  
Critical Elements ◽  
Growth Structure ◽  
Growth Properties ◽  
Main Candidate

ABSTRACTThin films of ferroelectric and piezoelectric materials are playing a growing role as critical elements in microwave acoustic devices, infrared imagers, integrated optic circuits, optical displays and high-performance semiconductor memories. In this review, we discuss recent progress in the control of growth, structure and properties of the main candidate materials, such as piezoelectric ZnO and AlN, and ferroelectric PZT-based solid solutions, KNbO3, bismuth titanate (Bi4Ti3O12), LiNbO3, LiTaO3 and KNO3. Brief mention is also made of the role and status ferroelectric polymers and of the BaMF4 class of fluorides. The emphasis of the review is primarily on vacuum-processed films, and optimization of characteristics required for integration into solid-state or semiconductor components.

Experimental and Numerical Investigation of the Mechanical and Aerodynamic Particle Size Effect in High-Speed Erosive Flows

2018 ◽  
Vol 140 (10) ◽  
Author(s):  
Max Hufnagel ◽  
Stephan Staudacher ◽  
Christian Koch
Keyword(s):  
Particle Size ◽  
Size Effect ◽  
High Speed ◽  
Particle Size Effect ◽  
Particle Impact ◽  
Size Distributions ◽  
Particle Size Distributions ◽  
Flat Plates ◽  
Aerodynamic Particle Size ◽  
The Impact

Aircraft engines are subject to deterioration due to solid particle erosion. The environmental particulates encountered in service often feature broad particle size distributions and a generally large scatter of particle properties. In order to numerically calculate the erosive change of shape of the components, experimentally calibrated erosion models are required. Due to aerodynamic and mechanical particle size effects, erosion tests with different particle size distributions have to be calibrated individually. In this study, erosion experiments under high-pressure compressor conditions are conducted using a sand-blast type erosion rig. Flat plates out of Ti6Al4V were eroded at different impingement angles. The erodent used was quartz sand with size distributions corresponding to standardized Arizona Road Dust (ARD) grades A2, A3, and A4. The particle impact conditions were investigated using a high-speed shadowgraphy technique in combination with computational fluid dynamics (CFD) computations. Dimensional analyses were carried out in respect to the particle transport process and the material removal process. A nondimensional erosion model is derived. The experimental shadowgraphy results are corrected using numerically calibrated similarity parameters for the particle impact conditions. Thus, the influence of the aerodynamic particle size effect was eliminated by correcting the impact conditions. The isolated mechanical particle size effect is demonstrated. It is shown that wear increases and that the modeled erosion rate maximum shifts toward larger impact angles when using coarser particle size distributions.

scholarly journals Aurivillius BaBi4Ti4O15 based compounds: Structure, synthesis and properties

2013 ◽  
Vol 7 (3) ◽  
pp. 97-110 ◽  
Author(s):  
Jelena Bobic ◽  
Mirjana Vijatovic-Petrovic ◽  
Biljana Stojanovic
Keyword(s):  
High Temperature ◽  
Bismuth Titanate ◽  
Piezoelectric Materials ◽  
Random Access ◽  
Ferroelectric Materials ◽  
Synthesis Methods ◽  
Structure Synthesis ◽  
Ferroelectric Random Access Memories ◽  
Piezoelectric Devices ◽  
Barium Bismuth

The discovery of some Aurivillius materials with high Curie temperature or fatigue-free character suggests possible applications in high temperature piezoelectric devices or non-volatile ferroelectric random access memories. Furthermore, increasing concerns for environmental issues have promoted the study of new leadfree piezoelectric materials. Barium bismuth titanate (BaBi4Ti4O15 ), an Aurivillius compound, is promising candidate to replace lead-based materials, both as lead-free ferroelectric and high temperature piezoelectric. In this review paper, we report a detailed overview of crystal structure, different synthesis methods and characteristic properties of barium bismuth titanate ferroelectric materials.

scholarly journals Development of poly (vinylidene fluoride)/silver nanoparticle electrospun nanofibre mats for energy harvesting

2021 ◽  
pp. 096739112110420
Author(s):  
Roopa Thotadara Shivalingappa ◽  
Hebbale Narayana Rao Narasimha Murthy ◽  
Pradeep Purushothaman ◽  
Prasanna Badiger ◽  
Swapnil Savarn ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Polyvinylidene Fluoride ◽  
Vinylidene Fluoride ◽  
Piezoelectric Materials ◽  
Applied Pressure ◽  
Fibre Diameter ◽  
X Ray Diffraction ◽  
Β Phase ◽  
Fourier Transformed Infrared Spectroscopy ◽  
Poly Vinylidene Fluoride

Energy harvesting using piezoelectric materials finds attention of researchers due to miniaturisation. Polyvinylidene fluoride (PVDF) is one such polymeric material with high piezoelectric and pyroelectric properties and hence is used for sensors, actuators, energy harvesting and biomedical devices. This study reports electrospinning of PVDF/Ag nanoparticles (AgNP) nanofibre mats for energy harvesting. Nanofibre mats were prepared by adopting voltage (20 kV), flow rate (1.5 mL/hour) and tip to collector distance (19 cm). The fibre mats were characterised using Fourier-Transformed Infrared Spectroscopy (FTIR), X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). FTIR and XRD results showed 11.84% and 36.36% increase in β-phase and crystallinity, respectively, due to the addition of 1.5 wt. % AgNP to PVDF. SEM micrographs showed decrease in bead formation and increase in fibre diameter from 40 nm to 355 nm due to the addition of AgNP. Sensitivity and voltage output were studied. The fibre mats were used for development of a miniature burglar alarm system, and its response to the applied pressure was tested.

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