Peculiarities of the pyroelectric current generated using a LiNbO3 single crystal driven by low-frequency sinusoidal temperature variation

Lithium niobate (LiNbO3) single crystal is one of the pyroelectric materials, which can be applicable in energy storage and conversion devices. A theoretical and experimental study of the sinusoidal temperature variation of a single crystal of LiNbO3 with ultra-low frequency of 1–80 mHz is presented...

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Bibliographic Details
Published in:Journal of applied physics 2022-11, Vol.132 (20)
Main Authors: Oleinik, A., Gilts, M., Karataev, P., Klenin, A., Kubankin, A.
Format: Article
Language:English
Subjects:
Applied physics
Coefficient of variation
Cycle time
Energy storage
Extremely low frequencies
Frequency ranges
Frequency variation
Lithium niobates
Mathematical analysis
Sine waves
Single crystals
Thermodynamic properties
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Summary:Lithium niobate (LiNbO3) single crystal is one of the pyroelectric materials, which can be applicable in energy storage and conversion devices. A theoretical and experimental study of the sinusoidal temperature variation of a single crystal of LiNbO3 with ultra-low frequency of 1–80 mHz is presented here. The previously unreported phenomenon of the optimal frequency range with the maximum amplitude of pyroelectric current oscillations is shown. It is noted that the observed effect is very sensitive to the thermal properties of the material. The impact of thermal properties of the crystal on the optimal frequency range is discussed. The accurate calculations of the pyroelectric coefficient using sinusoidal temperature variation are introduced. The observed phenomenon can be applied in pyroelectric energy converters and storage devices having a cycle time of 10–1000 s.
ISSN:0021-8979
1089-7550
DOI:10.1063/5.0124599