Abstract
In an effort to explore lead-free ferroelectric ceramic material for capacitor applications, the Sr and Zr co-doped BaTiO3 compound has been selected for investigation. A detailed study was carried out to study the effect of mechanical milling duration on structure, particle size, morphology, dielectric and piezoelectric properties. The Ba0.9Sr0.1Zr0.04Ti0.96O3 ceramics were synthesized using mechanochemical activation technique for different milling duration of 25, 30, 35, 40 and 45h. The Rietveld refinement analysis of X-ray diffraction pattern confirms the formation of tetragonal phase with P4mm space group for all the samples. When subjected to long duration mechanical milling, the samples have shown different grain size distribution. The average grain size reduces from 931nm to 385nm on increasing the milling duration from 25h to 45h. Ferroelectric studies reveal that the saturation and remnant polarization were found maximum for 35h milled sample. Furthermore, piezoelectric constant, d33 were also found to be maximum for 35h milled sample. The presence of Sr and Zr in barium titanate combined with optimized milling conditions may provide significant technological advances in the field of BaTiO3 based ferroelectric devices.
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