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Erschienen in:
01.01.2014
Effect of starting raw materials on the dielectric, ferroelectric and electro-shape-memory properties of Mn3+ doped (Pb40Sr60)TiO3 ceramics
Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 1/2014
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Abstract
The effect of starting raw materials on the dielectric, ferroelectric and electro-shape-memory properties of 0.5 mol% Mn3+ doped (Pb40Sr60)TiO3 ceramics was systematically studied. SEM observation showed that the ceramics fabricated from Pb3O4, SrCO3, TiO2 and MnCO3 possessed the most homogeneous microstructure and the largest grain size. As the macroscopic consequence, such ceramics exhibited large dielectric property and well-developed double hysteresis loop. More interestingly, it showed large digital-like recoverable electrostrain of 0.11 % under the electric field of 3 kV/mm, which can rival the widely used linear piezoelectricity of the hard PZT ceramics. Defect distribution within the large and homogenous grains was analyzed to explore the microscopic origin of the simultaneous domain switching behavior and the digital-like strain properties. Such feature indicated the importance of material processing on the on/off-characterized electromechanical applications.