Effect of fluorine on terrace-ledge-kink morphology and valence state of copper and titanium ions in CaCu3Ti4O12

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10485695" target="_blank" >RIV/00216208:11320/24:10485695 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=hy1g5tLZS~" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=hy1g5tLZS~</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.oceram.2024.100581" target="_blank" >10.1016/j.oceram.2024.100581</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of fluorine on terrace-ledge-kink morphology and valence state of copper and titanium ions in CaCu3Ti4O12

Popis výsledku v původním jazyce

Ceramic CaCu3Ti4O12 (&amp; Scy;&amp; Scy;&amp; Tcy;&amp; Ocy;), Ca0.98Cu3Ti4O11.96F0.04 (C Delta CTOF), and CaCu3Ti4O11.92F0.08 (CCTOF) were synthesized by the solid-state reaction technique. Fluorine stimulates the formation of Cu-depleted grains, Cu3+ ions, and Cu-rich composites CuO-xCCTO-yTiO(2)-zSiO(2)-w &amp; Scy;aF(2) (w &lt; z &lt; y &lt; x &lt; 1), which include parts of grinding bodies. The observed structures are distinct from simple grain boundaries of the perovskite phase. They exhibit a terrace-ledge-kink (TLK) morphology and, in some cases, the presence of twinning planes, both independent of fluorine content. They are responsible for the nanoscale barrier layer capacitance (NBLC) component of the dielectric response of both CCTO and CuO ceramics. Changes in the unit cell parameter a, and titanium and copper valences indicate that Ca2+ ions occupy part of Cu vacancies in the grains of CCTO and CCTOF. In C Delta CTOF, Ti3+ ions in the copper sublattice were found for the first time using NMR. The maximum epsilon &apos;(1kHz) = 6.9 x 10(4) demonstrates C Delta CTOF and the minimum tan delta = 0.045 is characteristic of CCTOF.

Název v anglickém jazyce

Effect of fluorine on terrace-ledge-kink morphology and valence state of copper and titanium ions in CaCu3Ti4O12

Popis výsledku anglicky

Ceramic CaCu3Ti4O12 (&amp; Scy;&amp; Scy;&amp; Tcy;&amp; Ocy;), Ca0.98Cu3Ti4O11.96F0.04 (C Delta CTOF), and CaCu3Ti4O11.92F0.08 (CCTOF) were synthesized by the solid-state reaction technique. Fluorine stimulates the formation of Cu-depleted grains, Cu3+ ions, and Cu-rich composites CuO-xCCTO-yTiO(2)-zSiO(2)-w &amp; Scy;aF(2) (w &lt; z &lt; y &lt; x &lt; 1), which include parts of grinding bodies. The observed structures are distinct from simple grain boundaries of the perovskite phase. They exhibit a terrace-ledge-kink (TLK) morphology and, in some cases, the presence of twinning planes, both independent of fluorine content. They are responsible for the nanoscale barrier layer capacitance (NBLC) component of the dielectric response of both CCTO and CuO ceramics. Changes in the unit cell parameter a, and titanium and copper valences indicate that Ca2+ ions occupy part of Cu vacancies in the grains of CCTO and CCTOF. In C Delta CTOF, Ti3+ ions in the copper sublattice were found for the first time using NMR. The maximum epsilon &apos;(1kHz) = 6.9 x 10(4) demonstrates C Delta CTOF and the minimum tan delta = 0.045 is characteristic of CCTOF.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

<a href="/cs/project/LM2023072" target="_blank" >LM2023072: Laboratoř fyziky povrchů – Vodíkové technologické centrum</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Open Ceramics

ISSN

2666-5395

e-ISSN

—

Svazek periodika

18

Číslo periodika v rámci svazku

Jun

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

14

Strana od-do

100581

Kód UT WoS článku

001225090900001

EID výsledku v databázi Scopus

2-s2.0-85188882394