Influence of interfacial stresses on electrical properties of bismuth manganite-lead titanate-epoxy composite

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62690094%3A18470%2F21%3A50018979" target="_blank" >RIV/62690094:18470/21:50018979 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S0272884221027796?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0272884221027796?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ceramint.2021.08.376" target="_blank" >10.1016/j.ceramint.2021.08.376</a>

Result language

angličtina

Original language name

Influence of interfacial stresses on electrical properties of bismuth manganite-lead titanate-epoxy composite

Original language description

This work compares the dielectric properties of two new materials. One was 0.88 bismuth manganite-0.12 lead titanate (noted BM-PT hereafter) ceramics composite obtained by standard high-temperature sintering. The second composite was obtained from powdered ceramics dispersed in epoxy glue (noted BM-PT-epoxy). The occurrence of four phases in the ceramics, using X-ray powder diffraction (XRD), was recognized: orthorhombic Pbam, cubic Pn3m, cubic Pm3m, and monoclinic P2/m phase. Pseudo-Voigt function fitting confirmed significant structural disorder in the BiMn2O5 crystal lattice. Analysis of broadband dielectric spectroscopy data confirmed the applicability of the small polaron model to explain detected relaxation processes. Involvement of oxygen vacancies in relaxation and their correspondence to ordered, uniform potential wells in crystal lattices was deduced. Electric conductivity relaxation times behavior proved the sensitivity of the ceramics&apos; electrical features to hydrostatic pressure. BM-PT-epoxy composite exhibited dielectric permittivity and losses two orders of magnitude lower than those of BM-PT ceramics that opened new prospects to application. One relaxation process in BM-PT-epoxy composite related to the ceramics fill contribution. Other induced relaxation, observed only in this composite, was attributed to interactions at interfaces between the introduced powdered ceramics and the epoxy glue matrix. We showed that stresses generated either by hydrostatic pressure or through the interfacial interaction of epoxy matrix led to the same results: relaxation times shortening.

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

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

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

Name of the periodical

CERAMICS INTERNATIONAL

ISSN

0272-8842

e-ISSN

—

Volume of the periodical

47

Issue of the periodical within the volume

24

Country of publishing house

GB - UNITED KINGDOM

Number of pages

14

Pages from-to

34619-34632

UT code for WoS article

000725040200003

EID of the result in the Scopus database

2-s2.0-85114664092