Phase structure and energy storage performance for BiFeO3–BaTiO3 based lead-free ferroelectric ceramics

Enhanced energy storage performance and thermal stability in relaxor ferroelectric (1‐x)BiFeO3‐x(0.85BaTiO3‐0.15Bi(Sn0.5Zn0.5)O3) ceramics

“…The substitution with larger ions in A‐ and B‐sites of BF would lead to the increase of lattice parameters, a reasonable consequence. Similar results were reported in other BF‐based solid solutions 27‐38 …”

“…It can be found that the average E b first increases and then slightly decreases with increasing x , giving rise to the maximal E b ~ 167 kV/cm at x = 0.65. This E b value is quite high in comparison to previously reported data for the BF‐based solid solutions 28‐38 . The dense structure and existence of PNRs are believed to be the reason for such high E b at x = 0.65.…”

“…Actually, the introduction of a ABO 3 relaxor would great improve the poor electrical insulation of BF, so that pure BF adopted as the ferroelectric phase is much simple and effective for forming solid solution with pure perovskite phase. This similar technique was used extensively in BF‐based ceramics for energy storage dielectrics 19,20,30‐34 . On the contrary, the BT‐BZS solid solution relaxor with high E b (≈280 kV/cm), 42 a member of the BaTiO 3 ‐Bi(Me 1/2 Me 1/2 )O 3 family, should be a favored candidate to complement the BF component for better energy storage properties.…”

Grain size engineered Ba0.9Sr0.1Ti0.9Hf0.1O3‐Na0.5Bi0.5TiO3 relaxor ceramics with improved energy storage performance

“…It can be observed that the BN9 sample has obtained the optimum combination of discharge energy density (1.61 J/cm 3 ) and energy efficiency (80.1%). Figure 5B shows a graph comparing the discharge energy density and energy efficiency results of the present investigation with previous literature 14,16,23,25‐40 . The graph (Figure 5B) suggests that the optimized material (ie, BN9) lies in the category of high energy density materials with moderate energy efficiency.…”

“…Figure 5B shows a graph comparing the discharge energy density and energy efficiency results of the present investigation with previous literature. 14,16,23,[25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40] The graph ( Figure 5B) suggests that the optimized material (ie, BN9) lies in the category of high energy density materials with moderate energy efficiency. It should be noted that there always exists some contradiction in designing a lead-free energy storage ceramic material.…”