Secondary Pyroelectric Effect and Figure of Merit of Ferroelectric 0–3 Composites. Issue 6 (24th May 2019)

• Record Type: Journal Article
• Authors: Ando, Daisuke; Eichhorn, Franziska; Fey, Tobias; Kakimoto, Ken‐ichi
• Is Part Of: Advanced engineering materials. Volume 21:Issue 6(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-05-24
• Subjects: composite -- lead‐free piezoelectric material -- pyroelectric -- secondary pyroelectric effect -- thermal expansion; Materials -- Periodicals; 620.11
• DOI: 10.1002/adem.201900241
• Languages: English
• ISSNs: 1438-1656

Abstract

Abstract : By mixing lead‐free piezoelectric Li0.06 (Na0.50 K0.50 )0.94 NbO3 (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). Abstract : 3–0 piezoelectric ceramic/polymer composites are produced by mixing lead‐free piezoelectric Li0.06 (Na0.50 K0.50 )0.94 NbO3 (LNKN) ceramic particles and an organic polysiloxane. This homogenous composite with 30 vol% LNKN is a novel pyroelectric element that exhibits an enhanced secondary pyroelectric effect and enhance the figure of merit of the composite.