期刊
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
卷 100, 期 5, 页码 2016-2023出版社
WILEY
DOI: 10.1111/jace.14720
关键词
dielectric relaxation; electronic ferroelectricity; Na1; 2Bi1; 2Cu(3)Ti(4)O(12) ceramics; relaxor
资金
- National Natural Science Foundation of China [51572001, 11174355]
- Weak Signal-Detecting Materials and Devices Integration of Anhui University [Y01008411]
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.
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