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Electrical properties of (Na,Ce) doped Bi 5 Ti 3 FeO 15 ceramics
Author(s) -
Huang Zhen,
Wang GenShui,
Li YuChen,
Liang RuiHong,
Cao Fei,
Dong XianLin
Publication year - 2011
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201000080
Subject(s) - materials science , electrical resistivity and conductivity , microstructure , sintering , curie temperature , analytical chemistry (journal) , ceramic , doping , dielectric , dopant , solid state reaction route , mineralogy , metallurgy , chemistry , condensed matter physics , optoelectronics , electrical engineering , physics , chromatography , ferromagnetism , engineering
Bi 5 Ti 3 FeO 15 (BTF) doped with (Na,Ce) was prepared by solid‐state reaction sintering. Effects of (Na,Ce) doping on the structure, microstructure, and electrical properties of BTF were investigated. The Curie point decreased from 759 to 711 °C with increasing dopant amount. At low temperatures (50–400 °C), peaks of dielectric losses only can be seen for BTF, Bi 4.95 Na 0.025 Ce 0.025 Ti 3 FeO 15 , and Bi 4.90 Na 0.05 Ce 0.05 Ti 3 FeO 15 ceramics. The highest piezoelectric constant d 33 of 13.4 pC/N is achieved for Bi 4.80 Na 0.10 Ce 0.10 Ti 3 FeO 15 ceramics. At an applied electric field of 200 kV/cm, the polarization–electrical field and the current–electrical field hysteresis loops of Bi 4.90 Na 0.05 Ce 0.05 Ti 3 FeO 15 ceramics are shown. This composition also has the highest room‐temperature resistivity, about 8 × 10 12 Ω · cm.