Synthesis and dielectric anomalies of CdCu3Ti4O12 ceramics. Issue 7 (August 2015)

• Record Type: Journal Article
• Authors: Zhao, Nan; Liang, Pengfei; Wei, Lingling; Yang, Longhai; Yang, Zupei
• Is Part Of: Ceramics international. Volume 41:Issue 7(2015)
• Page Start: 8501
• Page End: 8510
• Publication Date: 2015-08
• Subjects: CdCu3Ti4O12 ceramics -- Dielectric anomalies -- Oxygen vacancies; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2015.03.057
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: CdCu3 Ti4 O12 ceramics were successfully synthetized by the conventional solid-state reaction method. The influences of sintering parameters on phase structure, microstructure and dielectric properties were investigated systematically. CdCu3 Ti4 O12 ceramics sintered at 1020 °C for 15 h exhibited high temperature stability and outstanding dielectric properties, evidenced by the △ C T / C 25 °C ranges from −14.8% to 12.1% measured from −55 to 125 °C at 1 kHz, and the giant dielectric constant ε ′=2.4×10 4 as well as dielectric loss tan δ =0.072. Four dielectric anomalies were evidenced in dielectric temperature spectra and the related physical mechanisms were discussed in detail. The oxygen vacancies play an important role in dielectric anomalies in the high temperature range.