Abstract
Non-stoichiometric Sr0.8Bi2.15Ta2O9 (SBT) ferroelectric nano-ceramic powder was obtained by using high-energy ball milling technique. Calcination and sintering of the obtained SBT nano-powder were optimized at 700 °C for 30 min and 1000 °C for 30 min, respectively in a microwave furnace. XRD study confirmed single-phase orthorhombic structure of SBT ceramics. FESEM micrographs of calcined powder showed particles with size ranging from 60 to 170 nm. High value of εr and tanδ at higher temperature is attributed to space charges in the ceramics. Fatigue-free nature up to 109 switching cycles along with high Rsq ∼1.98 makes the SBT system suitable for NVFRAM applications.
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