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 porosities using the burned out polymer spheres process. The pore fraction was tailored by mixing a pore forming agent with BaTiO3 powder in varying amounts by weight before cold-pressing and pressureless sintering. Introducing porosity into the ferroelectric significantly increased the energy harvesting figure of merit, with a maximum of 2.85pm2/N obtained at ∼40% relative density compared with ∼1.0 pm2/N for the dense material. The results demonstrate that introducing porosity into a piezoelectric potentially provides an effective route to improving the vibration energy harvesting capability of these materials.

Original languageEnglish
Pages (from-to)40-46
Number of pages7
JournalFerroelectrics
Volume498
Issue number1
Early online date18 May 2016
DOIs
Publication statusPublished - 31 Aug 2016

Fingerprint

Energy harvesting
Ferroelectric materials
Porosity
porosity
Barium titanate
Powders
Vibrations (mechanical)
cold pressing
Macros
Porous materials
energy
Polymers
Sintering
ferroelectric materials
figure of merit
barium
sintering
routes
ceramics
vibration

Keywords

  • barium titanate
  • Piezoelectric energy harvesting
  • porous

Cite this

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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 porosities using the burned out polymer spheres process. The pore fraction was tailored by mixing a pore forming agent with BaTiO3 powder in varying amounts by weight before cold-pressing and pressureless sintering. Introducing porosity into the ferroelectric significantly increased the energy harvesting figure of merit, with a maximum of 2.85pm2/N obtained at ∼40{\%} relative density compared with ∼1.0 pm2/N for the dense material. The results demonstrate that introducing porosity into a piezoelectric potentially provides an effective route to improving the vibration energy harvesting capability of these materials.",
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author = "Roscow, {J. I.} and J. Taylor and Bowen, {C. R.}",
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AU - Roscow, J. I.

AU - Taylor, J.

AU - Bowen, C. R.

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N2 - Porous ferroelectric materials have been evaluated for their piezoelectric energy harvesting capabilities. Macro-porous barium titanate (BaTiO3) ceramics were fabricated with a range of porosities using the burned out polymer spheres process. The pore fraction was tailored by mixing a pore forming agent with BaTiO3 powder in varying amounts by weight before cold-pressing and pressureless sintering. Introducing porosity into the ferroelectric significantly increased the energy harvesting figure of merit, with a maximum of 2.85pm2/N obtained at ∼40% relative density compared with ∼1.0 pm2/N for the dense material. The results demonstrate that introducing porosity into a piezoelectric potentially provides an effective route to improving the vibration energy harvesting capability of these materials.

AB - Porous ferroelectric materials have been evaluated for their piezoelectric energy harvesting capabilities. Macro-porous barium titanate (BaTiO3) ceramics were fabricated with a range of porosities using the burned out polymer spheres process. The pore fraction was tailored by mixing a pore forming agent with BaTiO3 powder in varying amounts by weight before cold-pressing and pressureless sintering. Introducing porosity into the ferroelectric significantly increased the energy harvesting figure of merit, with a maximum of 2.85pm2/N obtained at ∼40% relative density compared with ∼1.0 pm2/N for the dense material. The results demonstrate that introducing porosity into a piezoelectric potentially provides an effective route to improving the vibration energy harvesting capability of these materials.

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