Ferroelectric, piezoelectric, pyroelectric and Raman spectroscopy studies on BaTi0.9(Fe1/2Nb1/2)0.1O3ceramic

✍ Scribed by Abdelkafi, Z. ;Abdelmoula, N. ;Khemakhem, H. ;Simon, A. ;Maglione, M.

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 549 KB
• Volume: 205
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200824142

✦ Synopsis

Abstract

The hysteresis, piezoelectric and pyroelectric properties were measured in the temperature range near the ferroelectric–paraelectric phase transition. The BaTi~0.9~(Fe~1/2~Nb~1/2~)~0.1~O~3~ ceramic exhibits typical ferroelectric P –E hysteresis behavior with a remanant polarization, P~r~, of about 7.52 μC/cm^2^ detected at 155 K. The electromechanical properties of this composition were measured using the resonance method. The ceramic provides high piezoelectric performance at the temperature of transition (T~max~ = 216 K): the piezoelectric constant is d~31~ = 140 pC/N and the electromechanical coupling factor was k~P~ = 22%. The pyroelectric study confirms the dielectric and ferroelectric measurements. The pyroelectric coefficient is about 125 nC/cm^2^ K at T~max~. Raman spectra of BaTi~0.9~(Fe~1/2~Nb~1/2~)~0.1~O~3~ ceramic were taken at various temperatures and measured over the wave number range from 150 to 1300 cm^–1^. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)