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Title: High-frequency thermal-electrical cycles for pyroelectric energy conversion

We report thermal to electrical energy conversion from a 150 nm thick BaTiO{sub 3} film using pyroelectric cycles at 1 kHz. A microfabricated platform enables temperature and electric field control with temporal resolution near 1 μs. The rapid electric field changes as high as 11 × 10{sup 5 }kV/cm-s, and temperature change rates as high as 6 × 10{sup 5 }K/s allow exploration of pyroelectric cycles in a previously unexplored operating regime. We investigated the effect of phase difference between electric field and temperature cycles, and electric field and temperature change rates on the electrical energy generated from thermal-electrical cycles based on the pyroelectric Ericsson cycle. Complete thermodynamic cycles are possible up to the highest cycle rates tested here, and the energy density varies significantly with phase shifts between temperature and electric field waveforms. This work could facilitate the design and operation of pyroelectric cycles at high cycle rates, and aid in the design of new pyroelectric systems.
Authors:
 [1] ;  [2] ;  [3] ;  [2] ;  [4] ;  [1] ;  [4]
  1. Department of Mechanical Science and Engineering, University of Illinois Urbana-Champaign, Urbana, Illinois 61801 (United States)
  2. Department of Materials Science and Engineering and Materials Research Laboratory, University of Illinois Urbana-Champaign, Urbana, Illinois 61801 (United States)
  3. Department of Mechanical Engineering, Texas Tech University, Lubbock, Texas 79409 (United States)
  4. (United States)
Publication Date:
OSTI Identifier:
22402682
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 19; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CONTROL; DESIGN; ELECTRIC FIELDS; ENERGY CONVERSION; ENERGY DENSITY; ERICSSON CYCLE; FILMS; PHASE SHIFT; RESOLUTION; TITANATES; WAVE FORMS