Broadband dielectric spectroscopy of standard and core-shell BaTiO3-NiO ceramic composites compared to the BaTiO3 ceramics

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F16%3A00465087" target="_blank" >RIV/68378271:_____/16:00465087 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1080/00150193.2016.1215213" target="_blank" >http://dx.doi.org/10.1080/00150193.2016.1215213</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1080/00150193.2016.1215213" target="_blank" >10.1080/00150193.2016.1215213</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Broadband dielectric spectroscopy of standard and core-shell BaTiO3-NiO ceramic composites compared to the BaTiO3 ceramics

Popis výsledku v původním jazyce

Using SPS we have processed and studied two ceramic composites of 70 vol% BaTiO3 and 30 vol% NiO with different topologies: standard and core-shell composites. The materials were characterized by XRD and SEM and studied by quantitative broadband dielectric spectroscopy up to the infrared range using four different spectroscopic techniques in the 10-450 K temperature range. The spectra were fitted with the factorized dielectric function of generalized damped oscillators in the infrared-terahertz range and by a set of Cole-Cole relaxations at lower frequencies below the polar phonon frequency range. Using the dielectric functions of the BaTiO3 ceramics and NiO crystal, we modelled the effective dielectric functions of the composite using three models based on the effective medium approximation: Bruggeman, Lichtenecker and generalized brick model (coated spheres). Qualitative agreement between the experimental and modelled effective dielectric functions was obtained.n

Název v anglickém jazyce

Broadband dielectric spectroscopy of standard and core-shell BaTiO3-NiO ceramic composites compared to the BaTiO3 ceramics

Popis výsledku anglicky

Using SPS we have processed and studied two ceramic composites of 70 vol% BaTiO3 and 30 vol% NiO with different topologies: standard and core-shell composites. The materials were characterized by XRD and SEM and studied by quantitative broadband dielectric spectroscopy up to the infrared range using four different spectroscopic techniques in the 10-450 K temperature range. The spectra were fitted with the factorized dielectric function of generalized damped oscillators in the infrared-terahertz range and by a set of Cole-Cole relaxations at lower frequencies below the polar phonon frequency range. Using the dielectric functions of the BaTiO3 ceramics and NiO crystal, we modelled the effective dielectric functions of the composite using three models based on the effective medium approximation: Bruggeman, Lichtenecker and generalized brick model (coated spheres). Qualitative agreement between the experimental and modelled effective dielectric functions was obtained.n

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

<a href="/cs/project/GA15-08389S" target="_blank" >GA15-08389S: Dielektrická a fononová spektroskopie multiferoik</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Ferroelectrics

ISSN

0015-0193

e-ISSN

—

Svazek periodika

500

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

19

Strana od-do

1-19

Kód UT WoS článku

000386464100002

EID výsledku v databázi Scopus

2-s2.0-84991466230