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Title

ELECTROSTRICTIVE BEHAVIOUR OF LEAD-FREE (BA0.85CA0.15)(ZR0.1TI0.9)O3 PIEZOCERAMICS

Pages

 Start Page 53 | End Page 66

Abstract

 In this work, the electrostrictive proprties of lead-free (Ba0.8Ca0.2) (Ti0.7Zr0.3) O3 PIEZOCERAMICs that were synthesized via solid state SINTERing method were investigated. These ceramics were SINTERed in the SINTERing range of 1350-1550 °C and the effects of SINTERing temperature on electostrictive behavior was studied. Crystal phases and microstructure were studied with X-ray diffraction (XRD) and scanning electron microscopy (SEM) and the polarization and strain loops were used to calculate the electrostrictive coefficients. Our results revealed that the BZT-50BCT samples at 1350 °C with the highest strain and the lowest Pr values at T=100 oC showed the best electrostrictive coefficients: Q33=0.058 m4/C2, and M33=6.1×10-16 m2/V2. These values are higher than previous reports on BZT-50BCT composition and enables this material to compete with the lead-based electrorective materilas.

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