A modified figure of merit for pyroelectric energy harvesting

Bowen, Chris R.; Taylor, J.; Boulbar, Emmanuel Le; Ząbek, Daniel; Topolov, V. Yu.

doi:10.1016/j.matlet.2014.10.004

Cited by 77 publications

(59 citation statements)

References 22 publications

(24 reference statements)

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“…Previous work has indicated that, in addition to Eq. , a modified figures‐of‐merit F ′ E that includes the influence of volume heat capacity c E can be used to select and compare materials for pyroelectric energy harvesting when the harvesting element is subjected to an incident power density, as shown in Eq. :

F_{normalE}^{'} = \frac{p^{2}}{{normalε}_{33}^{T} {(c_{normalE})}^{2}}

…”

Section: Resultsmentioning

confidence: 99%

Porous PZT Ceramics with Aligned Pore Channels for Energy Harvesting Applications

et al. 2015

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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 introduction of aligned pores was demonstrated to have a strong influence on the resultant porous ceramics, in terms of mechanical, dielectric, and pyroelectric properties. As the level of porosity was increased, the relative permittivity decreased, whereas the Curie temperature and dielectric loss increased. The aligned porous structure exhibited improvement in the compressive strength ranging from 19 to 35 MPa, leading to easier handling, better processability and wider applications for such type of porous material. Both types of pyroelectric harvesting figures-of-merit (F E and F 0 E ) of the PZT ceramics with a porosity level of 25-45 vol% increased in all porous ceramics, for example, from 11.41 to 12.43 pJ/m 3 / K 2 and 1.94 to 6.57 pm 3 /J, respectively, at 25°C, which were shown to be higher than the dense PZT counterpart.

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F_{normalE}^{'} = \frac{p^{2}}{{normalε}_{33}^{T} {(c_{normalE})}^{2}}

…”

Section: Resultsmentioning

confidence: 99%

Porous PZT Ceramics with Aligned Pore Channels for Energy Harvesting Applications

et al. 2015

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“…On the contrary, the thermal‐electrical energy harvesting is also a vital application of pyroelectric ceramics. In this direction, energy harvesting FOMs

false(F_{e} false) = \frac{p^{2}}{ε {italicε}_{0}}

and

false(F_{e}^{*} false) = \frac{p^{2}}{ε {italicε}_{0} C_{v}^{2}}

have been used by many researchers for pyroelectric energy harvesting materials selection . Both F e and F e * also increased with porosity as depicted in Figure .…”

Section: Resultsmentioning

confidence: 96%

Pyroelectric performance of porous Ba_0.85Sr_0.15TiO₃ ceramics

Srikanth

Singh

Vaish

2017

Int J Applied Ceramic Tech

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Porous Ba 0.85 Sr 0.15 TiO 3 (BST) ferroelectric ceramics were synthesized by sintering compacts consisting of BST and Poly(methyl methacrylate) (PMMA) (2%, 4%, 6%, 8%, and 10% by wt.) as pore-forming agent. Systematic investigation of role of porosity on microstructural, dielectric, and pyroelectric performance is carried out. It is observed that as PMMA increased from 0% to 10%, the porosity increased from 7.5% to 29.5%. Dielectric constant decreases and dielectric loss increases with increasing PMMA content at fixed frequency. When porosity reached 29.5%, the relative dielectric constant of the BST composition decreased by more than 78% (from 3500 to 750) at 10 kHz and 300 K. Porosity leads to a significant reduction in dielectric constant and volume-specific heat capacity, which are of great interest for improving pyroelectric figure of merits (FOMs).

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“…The common approach concerning the selection of materials for pyroelectric applications is to maximize the FOMs. In this regard, several types of pyroelectric FOMs can be considered, depending on specific applications, such as IR, thermal imaging, or energy conversion . Most studied FOMs are based on the consideration of the thermal and electrical circuits employed to maximize the voltage or current of a given input.…”

Section: Resultsmentioning

confidence: 99%

“…Most studied FOMs are based on the consideration of the thermal and electrical circuits employed to maximize the voltage or current of a given input. Therefore, to maximize the pyroelectric voltage for a given heat input, the FOM for high voltage responsivity ( F v ) can be proposed as F v = p / c v ϵ r ϵ 0 , in which c v and ϵ 0 are specific heat capacity at constant volume and permittivity of free space (8.85×10 −12 F m −1 ), respectively . Notably, c v is estimated as c v = c p ρ , in which c p and ρ are the specific heat capacity at constant pressure and density (7991.5 kg m −3 ), as shown in Figure b, respectively.…”

Section: Resultsmentioning

confidence: 99%

Tunable Pyroelectricity around the Ferroelectric/Antiferroelectric Transition

et al. 2017

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The pyroelectric performance of Pb0.99Nb0.02[(Zr0.57Sn0.43)0.92Ti0.08]0.98O3 ceramics was quantified by dielectric, polarization, and specific heat capacity measurements. The tunability of pyroelectric properties upon electric field application was studied as a function of temperature. The large pyroelectric coefficient of 0.28 C m−2 K−1 was associated with the ferroelectric (FE)–antiferroelectric (AFE) phase transition. The pyroelectric coefficient can be tuned over a broad temperature range of almost 40 K above the zero electric field phase transition. Electrical and thermal measurements were used to estimate various pyroelectric figures of merit. Pyroelectric figures of merit are almost three order of magnitude higher than those previously reported in FE materials. The large pyroelectric properties indicate that the investigated material is a promising candidate for many pyroelectric applications.

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A modified figure of merit for pyroelectric energy harvesting

Cited by 77 publications

References 22 publications

Porous PZT Ceramics with Aligned Pore Channels for Energy Harvesting Applications

Porous PZT Ceramics with Aligned Pore Channels for Energy Harvesting Applications

Pyroelectric performance of porous Ba_0.85Sr_0.15TiO₃ ceramics

Tunable Pyroelectricity around the Ferroelectric/Antiferroelectric Transition

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A modified figure of merit for pyroelectric energy harvesting

Cited by 77 publications

References 22 publications

Porous PZT Ceramics with Aligned Pore Channels for Energy Harvesting Applications

Porous PZT Ceramics with Aligned Pore Channels for Energy Harvesting Applications

Pyroelectric performance of porous Ba0.85Sr0.15TiO3 ceramics

Tunable Pyroelectricity around the Ferroelectric/Antiferroelectric Transition

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Pyroelectric performance of porous Ba_0.85Sr_0.15TiO₃ ceramics