Freeze cast porous barium titanate for enhanced piezoelectric energy harvesting

  title={Freeze cast porous barium titanate for enhanced piezoelectric energy harvesting},
  author={James I. Roscow and Y. Zhang and Marcin J. Kraśny and R. W. Lewis and J. Taylor and Christopher R. Bowen},
  journal={Journal of Physics D: Applied Physics},
Energy harvesting is an important developing technology for a new generation of self-powered sensor networks. This paper demonstrates the significant improvement in the piezoelectric energy harvesting performance of barium titanate by forming highly aligned porosity using freeze casting. Firstly, a finite element model demonstrating the effect of pore morphology and angle with respect to poling field on the poling behaviour of porous ferroelectrics was developed. A second model was then… 

Piezoelectric performance of PZT-based materials with aligned porosity: experiment and modelling

A new micromechanical model is proposed to analyse the piezoelectric properties of freeze-cast porous composite materials based on a ferroelectric lead zirconate titanate-type (PZT) ceramics. The

Residual Stress and Domain Switching in Freeze-Cast Porous Barium Titanate

In this paper, we provide the first direct evidence of enhanced domain mobility in porous barium titanate, compared to a dense sample of the same composition, facilitated by a relaxation in

Enhanced ferroelectricity for nanoporous barium titanate: a phase-field prediction

ABSTRACT Porous ferroelectric materials show great potential for achieving competitive dielectric/piezoelectric properties with light weight. In this study, a phase-field model was employed to

Tailoring porous piezoelectric properties for selected modes of energy harvesting

The piezoelectric charge coefficient and permittivity, of a piezoelectric material are the governing properties in the widely accepted figures of merit (FoM) for stress-driven longitudinal and

Orienting anisometric pores in ferroelectrics: Piezoelectric property engineering through local electric field distributions

Ferroelectrics are a technologically important class of materials, used in actuators, sensors, transducers, and memory devices. Introducing porosity into these materials offers a method of tuning



Enhanced pyroelectric and piezoelectric properties of PZT with aligned porosity for energy harvesting applications

  • C. Bowen
  • Engineering, Materials Science
  • 2019
This paper demonstrates the significant benefits of exploiting highly aligned porosity in piezoelectric and pyroelectric materials for improved energy harvesting performance. Porous lead zirconate

Porous PZT Ceramics with Aligned Pore Channels for Energy Harvesting Applications

In this study, aligned porous lead zirconate titanate (PZT) ceramics with high pyroelectric figures-of-merit were successfully manufactured by freeze casting using water-based suspensions. The

Manufacture and characterization of porous ferroelectrics for piezoelectric energy harvesting applications

ABSTRACT Porous ferroelectric materials have been evaluated for their piezoelectric energy harvesting capabilities. Macro-porous barium titanate (BaTiO3) ceramics were fabricated with a range of

Piezoelectric Properties of PZT‐Based Ceramic with Highly Aligned Pores

Porous lead zirconate titanate–lead zinc niobate (PZT–PZN) piezoelectric ceramics with a high degree of pore alignment were fabricated using directional freeze casting of a ceramic/camphene slurry.

Fabrication of Porous PZT–PZN Piezoelectric Ceramics With High Hydrostatic Figure of Merits Using Camphene‐Based Freeze Casting

Porous lead zirconate titanate–lead zinc niobate (PZT–PZN) piezoelectric ceramics with interconnected pore channels were fabricated using the camphene-based freeze-casting method. In this method,

Porous PZT Ceramics with High Hydrostatic Figure of Merit and Low Acoustic Impedance by TBA‐Based Gel‐Casting Process

Porous lead zirconate titanate (PZT) ceramics with three-dimensionally interconnected pores were prepared using a novel tert-butyl alcohol-based gel-casting process, an unconventional technique in

Porous piezoelectric ceramic hydrophone

The construction and evaluation of a hydrophone based on porous piezoelectric ceramics with high dhgh figure of merit (FOM) is described. It has been shown that, in order to improve the hydrophone

Porous Piezoelectric Ceramics

Lead Zirconate Titanate (PZT) is the best performing, cost effective class of piezoelectric materials known to date (Kumamoto et al., 1991; Martin et al., 1993; Perez et al. 2005). Its success is