Open AccessHydrostatic piezoelectric parameters of lead-free 2–0–2 composites with two single-crystal components: Waterfall-like orientation dependences
Author(s) -
V. Yu. Topolov,
А. Н. Исаева
Publication year - 2020
Publication title -
journal of advanced dielectrics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.38
H-Index - 13
eISSN - 2010-135X
pISSN - 2010-1368
DOI - 10.1142/s2010135x20500150
Subject(s) - materials science , crystal (programming language) , orientation (vector space) , anisotropy , single crystal , piezoelectricity , hydrostatic equilibrium , condensed matter physics , crystallography , physics , composite material , geometry , nuclear magnetic resonance , optics , mathematics , chemistry , quantum mechanics , computer science , programming language
A system of hydrostatic parameters is studied in novel 2–0–2 composites that contain two lead-free piezoelectric single-crystal components. The ferroelectric domain-engineered alkali niobate-tantalate-based single-crystal layer promotes large values of the piezoelectric coefficients [Formula: see text] and [Formula: see text], hydrostatic squared figure of merit [Formula: see text], and hydrostatic electromechanical coupling factor [Formula: see text] of the composite wherein the 0–3 Li 2 B 4 O 7 single crystal/polyethylene layers are adjacent to the aforementioned single-crystal layer. Hereby, the role of the elastic anisotropy of the 0–3 layer is emphasized. An orientation effect concerned with rotations of the crystallographic axes of the piezoelectric Li 2 B 4 O 7 single crystal in the 0–3 layer is first studied. It is shown that the orientation of the crystallographic axis [Formula: see text] of the Li 2 B 4 O 7 single crystal in the polymer matrix strongly influences the piezoelectric properties and hydrostatic parameters of the composite. Examples of the so-called waterfall-like orientation dependences of the hydrostatic parameters are analyzed. The composite based on the domain-engineered [Li x ([Formula: see text][Formula: see text]]([Formula: see text][Formula: see text]O 3 :Mn single crystal is of interest due to [Formula: see text][Formula: see text]mV[Formula: see text]m/N, [Formula: see text] Pa[Formula: see text], and [Formula: see text]–0.75 in the studied volume-fraction and orientation ranges, and these hydrostatic parameters are to be taken into account in the field of piezotechnical, hydroacoustic, and energy-harvesting applications.