Počet záznamů: 1
Broadband dielectric spectroscopy of standard and core-shell BaTiO.sub.3./sub.-NiO ceramic composites compared to the BaTiO.sub.3./sub. ceramics
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SYSNO ASEP 0465087 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Broadband dielectric spectroscopy of standard and core-shell BaTiO3-NiO ceramic composites compared to the BaTiO3 ceramics Tvůrce(i) Nuzhnyy, Dmitry (FZU-D) RID, ORCID
Petzelt, Jan (FZU-D) RID, ORCID, SAI
Bovtun, Viktor (FZU-D) RID, ORCID, SAI
Ostapchuk, Tetyana (FZU-D) RID, ORCID
Savinov, Maxim (FZU-D) RID, ORCID
Kempa, Martin (FZU-D) RID, ORCID
Bednyakov, Petr (FZU-D) RID, ORCID
Fernández-Garciá, L. (ES)
Rodriguez-Suarez, T. (ES)
Menendéz, J.L. (ES)Zdroj.dok. Ferroelectrics. - : Taylor & Francis - ISSN 0015-0193
Roč. 500, č. 1 (2016), s. 1-19Poč.str. 19 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova core-shell composite ; effective dielectric function ; effective infrared response ; effective medium approximation ; percolation ; barium titanate ; nickel oxide Vědní obor RIV BM - Fyzika pevných látek a magnetismus CEP GA15-08389S GA ČR - Grantová agentura ČR Institucionální podpora FZU-D - RVO:68378271 UT WOS 000386464100002 EID SCOPUS 84991466230 DOI 10.1080/00150193.2016.1215213 Anotace 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.
Pracoviště Fyzikální ústav Kontakt Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Rok sběru 2017
Počet záznamů: 1