James Roscow
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View article: Strong lead-free bioinspired piezoceramics for durable energy transducers
Strong lead-free bioinspired piezoceramics for durable energy transducers Open
Durable, high-performance and eco-friendly lead-free piezoceramics are essential for next-generation sustainable energy transducers and electromechanical systems. While significant performance enhancements have been made, through chemical …
View article: Microcellular Poly (Ethylene‐Co‐Vinyl Acetate)/Lignin Nanocomposites for Soft Ferroelectrets
Microcellular Poly (Ethylene‐Co‐Vinyl Acetate)/Lignin Nanocomposites for Soft Ferroelectrets Open
This work examines the role of lignin and carbon nanotubes (CNT) in modifying the mechanical, dielectric, and ferroelectret properties of poly (ethylene‐co‐vinyl acetate) (EVA)‐based nanocomposite foams, with the potential to act as a ferr…
View article: Freeze-Cast Porous Textured BaTiO<sub>3</sub>–Polymer Composites for Energy Harvesting Applications
Freeze-Cast Porous Textured BaTiO<sub>3</sub>–Polymer Composites for Energy Harvesting Applications Open
Porous piezoelectric ceramics exhibit a unique combination of high piezoelectric charge coefficients (d ij ) and low permittivity compared to their dense counterparts, which is desirable for achieving high piezosensing and energy harvestin…
View article: New pyroelectric figures of merit for harvesting dynamic temperature fluctuations
New pyroelectric figures of merit for harvesting dynamic temperature fluctuations Open
This paper outlines new performance figures of merit for the selection and design of pyroelectric materials for harvesting dynamic temperature fluctuations.
View article: Porous Structure Enhances the Longitudinal Piezoelectric Coefficient and Electromechanical Coupling Coefficient of Lead‐Free (Ba<sub>0.85</sub>Ca<sub>0.15</sub>)(Zr<sub>0.1</sub>Ti<sub>0.9</sub>)O<sub>3</sub>
Porous Structure Enhances the Longitudinal Piezoelectric Coefficient and Electromechanical Coupling Coefficient of Lead‐Free (Ba<sub>0.85</sub>Ca<sub>0.15</sub>)(Zr<sub>0.1</sub>Ti<sub>0.9</sub>)O<sub>3</sub> Open
The introduction of porosity into ferroelectric ceramics can decrease the effective permittivity, thereby enhancing the open circuit voltage and electrical energy generated by the direct piezoelectric effect. However, the decrease in the l…
View article: Ferroelectric-enhanced batteries for rapid charging and improved long-term performance
Ferroelectric-enhanced batteries for rapid charging and improved long-term performance Open
Ferroelectric materials with large spontaneous polarization and high permittivity are emerging as potential candidates to enhance the performance of lithium-ion, sodium-ion, and solid-state batteries. This review provides an overview of th…
View article: Exploring lead-free materials for screen-printed piezoelectric wearable devices
Exploring lead-free materials for screen-printed piezoelectric wearable devices Open
The rapid advancements in wearable technology demand innovative materials that are flexible, lightweight, and environmentally sustainable. Here, we report the formulation, characterization, and application of screen-printed piezoelectric i…
View article: Energy Harvesting from Water Flow by Using Piezoelectric Materials
Energy Harvesting from Water Flow by Using Piezoelectric Materials Open
Piezoelectric Energy Harvesters As an interdisciplinary field, the energy harvesting of water flow using piezoelectric materials encompasses a range of subjects; this includes fluid-solid excitation mechanisms, piezoelectrics, interface ci…
View article: Temperature-Dependent Ferroelectric Properties and Aging Behavior of Freeze-Cast Bismuth Ferrite–Barium Titanate Ceramics
Temperature-Dependent Ferroelectric Properties and Aging Behavior of Freeze-Cast Bismuth Ferrite–Barium Titanate Ceramics Open
Lead-free BiFeO3-BaTiO3 (BF-BT) piezoceramics have sparked considerable interest in recent years due to their high piezoelectric performance and high Curie temperature. In this paper, we show how the addition of highly aligned porosity (be…
View article: Sensor Technologies for Hydraulic Valve and System Performance Monitoring: Challenges and Perspectives
Sensor Technologies for Hydraulic Valve and System Performance Monitoring: Challenges and Perspectives Open
Hydraulic fluid power systems are essential for a range of engineering applications such as transportation, heavy industry, and robotics. The scale of the industry is such that hydraulic pumps are estimated to account for 15% of all the en…
View article: Prediction of the electromechanical properties of a piezoelectric composite material through the artificial neural network
Prediction of the electromechanical properties of a piezoelectric composite material through the artificial neural network Open
This paper presents an approach to evaluate the effective properties of the 1-3 composite material formed of piezoelectric fibre and matrix material using an artificial neural network. Firstly, finite element method (FEM) is used to determ…
View article: Energy Harvesting from Water Flow by Using Piezoelectric Materials
Energy Harvesting from Water Flow by Using Piezoelectric Materials Open
As a promising energy‐harvesting technique, an increasing number of researchers seek to exploit the piezoelectric effect to power electronic devices by harvesting the energy associated with water flow. In this emerging field, a variety of …
View article: Exploring cooling of PV panels based on metallic and nonmetallic nanofluids: An experimental study
Exploring cooling of PV panels based on metallic and nonmetallic nanofluids: An experimental study Open
An outdoor experimental study investigated the cooling of photovoltaic (PV) panels using nano-fluids containing metallic (calcium carbonate, CaCO 3 ) and non-metallic (ferro-magnetite, Fe 3 O 4 ) particles. The study compared the solar pow…
View article: Improving piezoelectric energy harvesting performance through mechanical stiffness matching
Improving piezoelectric energy harvesting performance through mechanical stiffness matching Open
The mechanical energy transfer between the source structure and active material in piezoelectric energy harvesters is investigated here. First, an analytical prediction to improve mechanical energy transfer into the piezoelectric material …
View article: Uncovering the Printability, Morphological, and Functional Properties of Thick Ferroelectric Composites for Next‐Generation Low‐Cost Scalable Sensors
Uncovering the Printability, Morphological, and Functional Properties of Thick Ferroelectric Composites for Next‐Generation Low‐Cost Scalable Sensors Open
Herein, new insights into the printability, rheological, morphological, dielectric, and piezoelectric characteristics of microscale thick‐film particulate ferroelectric composites are provided. This is achieved by the fabrication and print…
View article: A comprehensive energy flow model for piezoelectric energy harvesters: Understanding the relationships between material properties and power output
A comprehensive energy flow model for piezoelectric energy harvesters: Understanding the relationships between material properties and power output Open
Piezoelectric materials have significant potential for mechanical harvesting and have an important influence in determining the power output. While the energy harvesting figure of merit (FoMij) is frequently used to evaluate the performanc…
View article: The unusual case of plastic deformation and high dislocation densities with the cold sintering of the piezoelectric ceramic K0.5Na0.5NbO3
The unusual case of plastic deformation and high dislocation densities with the cold sintering of the piezoelectric ceramic K0.5Na0.5NbO3 Open
K0.5Na0.5NbO3 (KNN) can be readily densified using the cold sintering process, but despite observing high relative permittivity, the ferroelectric hysteresis is strongly suppressed along with a major suppression in the all-important piezoe…
View article: Orienting anisometric pores in ferroelectrics: Piezoelectric property engineering through local electric field distributions
Orienting anisometric pores in ferroelectrics: Piezoelectric property engineering through local electric field distributions Open
Ferroelectrics are a technologically important class of materials that are used in actuators, sensors, transducers, and memory devices. Introducing porosity into these materials offers a method of tuning functional properties for certain a…