Ultra high strain properties of lanthanum substituted PZT electro-ceramics prepared via mechanical activation

作者：Kumar Ajeet; Prasad V V Bhanu; Raju K C James; James A R^*

来源：Journal of Alloys and Compounds, 2014, 599: 53-59.

DOI：10.1016/j.jallcom.2014.02.037

• Milling
• Ferroelectric properties
• Piezoelectric properties
• PLZT

Substitution of lanthanum at the A sites of perovskite lead zirconate titanate ceramics shows an improvement in the structural and electrical properties. (Pb0.92La0.08)(Zr0.60Ti0.40)O-3 (PLZT 8/60/40) was prepared using high energy mechano-chemical milling. The effect of milling on the microstructure and electrical properties of PLZT 8/60/40 has been studied. X-ray diffraction shows the phase formation after milling itself. TEM was used to measure the particle size. The SEM image of the sintered pellet shows a dense microstructure and the average grain size was found to be %26lt;1.5 mu m. Electrical properties of the ceramics were characterized. Piezoelectric charge coefficient (d(33)) was found to be 561 pC/N. Resonance studies were performed on poled ceramics and the electromechanical coupling factor was calculated by the resonance method. The PLZT 8/60/40 composition showed a well saturated and uniform P-E hysteresis loop with remanent polarization (P-r) of 33.29 mu C/cm(2) and a coercive field (E-c) of 10.57 kV/cm. Electric field induced strain (S-E loop) shows a value of similar to 0.27% with minimum loss.

• 出版日期2014-6-25