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Secondary Pyroelectric Effect and Figure of Merit of Ferroelectric 0–3 Composites
Author(s) -
Ando Daisuke,
Eichhorn Franziska,
Fey Tobias,
Kakimoto Kenichi
Publication year - 2019
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201900241
Subject(s) - pyroelectricity , materials science , figure of merit , composite material , microstructure , ferroelectricity , ceramic , composite number , ferroelectric ceramics , piezoelectricity , natural bond orbital , homogeneous , filler (materials) , dielectric , optoelectronics , mathematics , density functional theory , chemistry , computational chemistry , combinatorics
By mixing lead‐free piezoelectric Li 0.06 (Na 0.50 K 0.50 ) 0.94 NbO 3 (LNKN) ceramic particles and polysiloxane, the authors synthesize a novel pyroelectric element that exhibits an enhanced secondary pyroelectric effect. The composite with an LNKN filler ratio of 30 vol% exhibits a homogeneous microstructure and a strong contact between the LNKN filler and the polysiloxane matrix. Thus, the secondary pyroelectric effect originating from such an interaction accounts for approximately half of the total pyroelectric coefficient (i.e 29 μC/m 2 K) and enhanced the figure of merit of the composite (1.1 μC/m 2 K).