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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.123  No.1442 (October) (2015)  >  pp.972-977

Journal of the Ceramic Society of Japan
<<Previous article Vol.123  No.1442 (October) (2015)   pp.972 - 977 Next article>>

Enhanced multiferroic property in Co2O3-added BiFeO3–BaTiO3 ceramics

Xiaochun WU1), Xiaolan WU1), Lingling LUO1), Qiaoji ZHENG1), Dunmin LIN1)
1) College of Chemistry and Materials Science, Sichuan Normal University

0.7BiFeO3–0.3BaTiO3 + 1 mol % MnO2 + x mol % Co2O3 multiferroic ceramics were fabricated by an ordinary sintering technique and the effects of Co doping on the microstructure, multiferroic and piezoelectric properties of the ceramics were studied. All the ceramics possess a pure perovskite structure with rhombohedral symmetry. The addition of a small amount of Co2O3 enhances the ferroelectricity, ferromagnetism, piezoelectricity and temperature stability of the ceramics. The ceramic with x = 1.0 possesses enhanced piezoelectricity (d33 = 134 pC/N), good ferroelectricity (Pr = 19.9 µC/cm2) and increased high depolarization temperature (Td = 475°C). The 1 mol % Co2O3 doping greatly improves the ferromagnetic property of the ceramics and the optimum remnant magnetization Mr of 0.191 emu/g of the ceramic is obtained at x = 1.0. These results show that the ceramic with x = 1.0 is a promising candidate for lead-free high-temperature piezoelectric and room-temperature multiferrioc materials.


Keyword:
Lead-free ceramics, Multiferroic, Piezoelectric, Temperature stability, BiFeO3–BaTiO3

Received: March 06, 2015
Accepted: July 27, 2015 , Published online: October 01, 2015

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