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Thermomechanical Energy Conversion Potential of Lead-Free 0.50Ba(Zr0.2Ti0.8 )O3–0.50(Ba0.7Ca0.3)TiO3 Bulk Ceramics

Patel, Satyanarayan and Chauhan, Aditya and Rojas, Virginia and Novak, Nikola and Weyland, Florian and Rödel, Jürgen and Vaish, Rahul (2018):
Thermomechanical Energy Conversion Potential of Lead-Free 0.50Ba(Zr0.2Ti0.8 )O3–0.50(Ba0.7Ca0.3)TiO3 Bulk Ceramics.
2018, In: Energy Technology, (6), WILEY-VCH Verlag, pp. 865-871, ISSN 2194-4296, DOI: 10.1002/ente.201700416,
[Article]

Abstract

When employed appropriately, ferroelectric materials present themselves as one of the most efficient means of waste (thermal/mechanical) energy scavenging. A large conversion potential can be obtained when appropriate materials are combined with high-field actuation (Ericsson cycle). However, waste energy rarely presents itself in an isolated form (heat or vibration). There is also a distinct lack of systems capable of simultaneous thermomechanical energy conversion, especially in the low-frequency range. In this regard a systematic approach to the concept of combined energy harvesting and storage potential of a singular material system is presented. Polarization versus electric field hysteresis loops were gathered as a function of temperature, uniaxial compressive stress, and electric field. Thereafter, a theoretical assessment was made to the effect of the biased and unbiased energy conversion potential of 0.50Ba(Zr0.2Ti0.8)O3– 0.50(Ba0.7Ca0.3)TiO3 bulk lead-free ferroelectric material. Maximum energy conversion potentials of 150 and 210 kJm@3 were obtained for thermal (5 MPa, 24–96 8C) and mechanical cycles (24 8C, 5–160 MPa), respectively. A slightly improved performance of 220 kJm@3 was obtained under simultaneous depolarization, despite performance degradation through individual biasing. However, the energy-storage density improved by 100% (80 kJm@3) and 50% (60 kJm@3), respectively, when operated under elevated stress (60 MPa) and temperature (90 8C). Results are indicative of a singular material system that could be used for combined thermomechanical energy conversion and on-board storage capacity.

Item Type: Article
Erschienen: 2018
Creators: Patel, Satyanarayan and Chauhan, Aditya and Rojas, Virginia and Novak, Nikola and Weyland, Florian and Rödel, Jürgen and Vaish, Rahul
Title: Thermomechanical Energy Conversion Potential of Lead-Free 0.50Ba(Zr0.2Ti0.8 )O3–0.50(Ba0.7Ca0.3)TiO3 Bulk Ceramics
Language: English
Abstract:

When employed appropriately, ferroelectric materials present themselves as one of the most efficient means of waste (thermal/mechanical) energy scavenging. A large conversion potential can be obtained when appropriate materials are combined with high-field actuation (Ericsson cycle). However, waste energy rarely presents itself in an isolated form (heat or vibration). There is also a distinct lack of systems capable of simultaneous thermomechanical energy conversion, especially in the low-frequency range. In this regard a systematic approach to the concept of combined energy harvesting and storage potential of a singular material system is presented. Polarization versus electric field hysteresis loops were gathered as a function of temperature, uniaxial compressive stress, and electric field. Thereafter, a theoretical assessment was made to the effect of the biased and unbiased energy conversion potential of 0.50Ba(Zr0.2Ti0.8)O3– 0.50(Ba0.7Ca0.3)TiO3 bulk lead-free ferroelectric material. Maximum energy conversion potentials of 150 and 210 kJm@3 were obtained for thermal (5 MPa, 24–96 8C) and mechanical cycles (24 8C, 5–160 MPa), respectively. A slightly improved performance of 220 kJm@3 was obtained under simultaneous depolarization, despite performance degradation through individual biasing. However, the energy-storage density improved by 100% (80 kJm@3) and 50% (60 kJm@3), respectively, when operated under elevated stress (60 MPa) and temperature (90 8C). Results are indicative of a singular material system that could be used for combined thermomechanical energy conversion and on-board storage capacity.

Journal or Publication Title: Energy Technology
Volume: 2018
Number: 6
Publisher: WILEY-VCH Verlag
Divisions: 11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
11 Department of Materials and Earth Sciences
Date Deposited: 15 May 2018 07:50
DOI: 10.1002/ente.201700416
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