Composition driven (Ba,Ca)(Zr,Ti)O3 lead-free ceramics with large quality factor and energy harvesting characteristics

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24510%2F21%3A00009320" target="_blank" >RIV/46747885:24510/21:00009320 - isvavai.cz</a>

Alternative codes found

RIV/00216305:26620/21:PU139446

Result on the web

<a href="https://doi.org/10.1111/jace.17497" target="_blank" >https://doi.org/10.1111/jace.17497</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/jace.17497" target="_blank" >10.1111/jace.17497</a>

Result language

angličtina

Original language name

Composition driven (Ba,Ca)(Zr,Ti)O3 lead-free ceramics with large quality factor and energy harvesting characteristics

Original language description

A comprehensive study on energy harvesting characteristics as well as electro-mechanical properties of lead-free (1−x)(BaZr0.2Ti0.8)O3—x(Ba0.7Ca0.3Ti)O3 ceramics were systematically carried out. Raman and Rietveld analyses show a formation of rhombohedral-orthorhombic-tetragonal (R-O-T) phase boundary region between 4/6 BZT/BCT and 6/4 BZT/BCT compositional range. Raman modes shift toward lower frequencies with increased Zr/Ca stoichiometric ratio attributed to asymmetric Ti-O phonon vibrations, which caused local disorder, widening of energy band and reduced Curie temperature. The large mechanical quality factor Qm = 556 is related to the hardening effect and significantly high energy conversion efficiency η = 96% was discovered for 3/7 BZT/BCT composition. Largely, the noblest electro-mechanical properties were retrieved for 5/5 BZT/BCT ceramics, in which d33 = 500 pC/N (from quasi-static d33 meter), d33 = 540 pm/V (from field-dependent d33 curves) indicating that the both methods are analogous with a deviation of 8%. The outstanding energy harvesting characteristics such as voltage constant g33 = 27 × 10−3 Vm/N, transduction coefficient d33 × g33 = 13 301 × 10−15 m2/N, figure of merit under off-resonance conditions FOMoff = 12.1 × 10−10 m2/N and fairly large η of 94% were attained again for 5/5 BZT/BCT ceramics. These outstanding characteristics were ascribed to the R-O-T phase boundary region that comprises a low energy barrier, consequently facilitated easy polarization rotation and triggered an increased electro-mechanical conversion. These characteristics outperform other lead-free and even most commercially available lead-based ceramics, and thus suitable for sensors, actuators, resonators, and energy harvesting applications.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20504 - Ceramics

Project

<a href="/en/project/GA18-20498S" target="_blank" >GA18-20498S: Control of microstructure and properties of lead-free piezoceramic materials through advanced ceramic processing</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of the American Ceramic Society

ISSN

0002-7820

e-ISSN

—

Volume of the periodical

104

Issue of the periodical within the volume

2

Country of publishing house

US - UNITED STATES

Number of pages

14

Pages from-to

1088-1101

UT code for WoS article

000577697500001

EID of the result in the Scopus database

2-s2.0-85092505357