Effect of potassium concentration on the structure and electrical properties of lead-free Bi0.5 (Na,K)0.5 TiO3–BiAlO3 piezoelectric ceramics

Microstructure, electrical properties of Bi2NiMnO6-doped 0.935(Bi1/2Na1/2) TiO3–0.065BaTiO3 lead-free piezoelectric ceramics

“…2 shows SEM micrographs of various BNMO doped BNT-BT6.5 ceramics. The SEM observation confirms that all the investigated samples are visibly dense with a well-developed microstructure that has a clear grain boundary and uniform grain sizes, which are all typical microstructures with rectangular grain shape as normally observed in BNT-based piezoceramics [12,21,22]. In addition, these micrographs also indicated that BNMO-doped causes a significant change in grain shape and size: the average grain size first increased and then decreased with increasing BNMO contents.…”

Synthesis and characterizations of (1-Φ) (NBT-BT)-ΦSB ex T ceramics for NVRAM applications

“…Significant reduction of induced strain accompanied by deviation from the butterfly shaped S-E loops revealed that the ferroelectric and non-polar phases coexists in (1-ϕ) (NBT-BT)-ϕSB ex T (with ϕ= 2, 4, 8, 12, 16 wt.%) ceramic samples. Moreover, this suggests that an easy transition between ferroelectric and non-polar phases occurred under an electric field [38]. S-E loop of ceramics for ϕ=16 wt.…”

Effect of Electric Field Concentration by Electrode Patterning on the Incipient Piezoelectric Strain Properties of Lead-Free Piezoceramics

“…1 applied to one of the well-known lead-free relaxor systems, 0.97Bi 1/2 (Na 0.78 K 0.22 ) 1/2 TiO 3 -0.03Bi-AlO 3 (BNKT-BA). 30) As will be shown and discussed, electrode patterning does have a positive effect on enhancing incipient piezostrains, although there is ample room for further improvement.…”