Relaxor‐like behaviors in Na1/2Bi1/2Cu3Ti4O12 ceramics

Relaxor‐like behaviors in Na1/2Bi1/2Cu3Ti4O12 ceramics

Dielectric properties of Na1/2Bi1/2Cu3Ti4O12 ceramics were evaluated over the temperature range 300‐720 K. Two relaxor‐like dielectric anomalies were found. The low‐temperature anomaly was confirmed to be an oxygen‐vacancy‐related relaxation process. It is a pseudo‐relaxor behavior caused by a bulk...

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Veröffentlicht in:Journal of the American Ceramic Society 2017-05, Vol.100 (5), p.2016-2023
Hauptverfasser: Wang, Chunchang, Ni, Wei, Sun, Xiaohong, Wang, Le, Wang, Can, Jin, Kuijuan
Format: Artikel
Sprache:eng
Schlagworte:
Anomalies
Ceramics
Dielectric properties
Dielectric relaxation
electronic ferroelectricity
Ferroelectric materials
Na1/2Bi1/2Cu3Ti4O12 ceramics
Phase transitions
relaxor
Vacancies
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Zusammenfassung:Dielectric properties of Na1/2Bi1/2Cu3Ti4O12 ceramics were evaluated over the temperature range 300‐720 K. Two relaxor‐like dielectric anomalies were found. The low‐temperature anomaly was confirmed to be an oxygen‐vacancy‐related relaxation process. It is a pseudo‐relaxor behavior caused by a bulk relaxation and a Maxwell‐Wagner relaxation. The high‐temperature one was evidenced to be an electric ferroelectric phase‐transition process resulting from the oxygen‐vacancy ordering.
ISSN:0002-7820
1551-2916
DOI:10.1111/jace.14720