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Pyroelectric Energy Harvesting Using Ferroelectric Ba 1− x Ca x TiO 3
Author(s) -
Hayashi Kei,
Aikawa Eisuke,
Ueno Toru,
Kajitani Tsuyoshi,
Miyazaki Yuzuru
Publication year - 2018
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201701002
Subject(s) - pyroelectricity , octahedron , tetragonal crystal system , ferroelectricity , materials science , polarization (electrochemistry) , perovskite (structure) , piezoelectricity , analytical chemistry (journal) , mineralogy , crystallography , optoelectronics , crystal structure , chemistry , dielectric , composite material , chromatography
The structural and pyroelectric properties of partially Ca‐substituted BaTiO 3 , Ba 1− x Ca x TiO 3 (0 ≤ x ≤ 0.2), are investigated. Partial Ca‐substitution in BaTiO 3 introduced tetragonal distortion in the TiO 6 octahedrons and increased the displacement, Δ d , of a Ti 4+ cation from the center of an octahedron. This increase in Δ d led to enhancement of remanent polarization and pyroelectric voltage, V p . The pyroelectric energy storage behavior is demonstrated for the partially Ca‐substituted BaTiO 3 . For the Ba 0.9 Ca 0.1 TiO 3 sample which exhibited the highest V p , the stored energy in an output capacitor was proven to be sufficient to operate micropower Internet of Things devices.