Rapid poling under low direct current field of [001] oriented BiFeO3-based lead-free ceramics

Hidden piezoelectric performances of BiFeO3-based textured ceramics

“…18 To further explore BF-based textured ceramics, we carried out a systematic study on BF-xBT ceramics and found that higher contents of BiFeO 3 made it difficult to improve the degree of texturing ( f ) of BF-based textured ceramics. 19 In our previous work, although 0.7BFBT textured ceramic showed rapid poling characteristics, its d 33 value was not significantly enhanced compared to those of random samples. 19 Poor insulation properties are one of the key issues for BFbased ceramics.…”

“…This is a good explanation for the failure to observe a significant enhancement in the piezoelectric properties of BF-based textured ceramics in our previous work. 19 For T-Q9, although the f value was the same as for the other samples, and the insulation was optimal, the structural distortion became weaker due to the decrease in the rhombohedral phase, and the large and disordered domains affected the domain switching, leading to decreased ferroelectricity. Moreover, the phase angle of the sample began to decrease, demonstrating that the poling was inadequate.…”

“…[001]-oriented 0.7BF-0.3BT + 0.8 mol% MnO 2 with 7 mol% BT templates (0.7BFBT-T) ceramics were synthesized using the template grain growth (TGG) process. 19 0.7BFBT-R (random samples) and 0.7BFBT-T (textured samples) were held for 3 h at 980 °C and then cooled in a furnace (R-FC, T-FC). Subsequently, the furnace-cooled samples were held at 500 °C, 600 °C, 700 °C, 800 °C or 900 °C (abbreviated as T-Q5, T-Q6, T-Q7, T-Q8 and T-Q9) for 0.5 h and then dropped in silicone oil.…”

“…18 To further explore BF-based textured ceramics, we carried out a systematic study on BF- x BT ceramics and found that higher contents of BiFeO 3 made it difficult to improve the degree of texturing ( f ) of BF-based textured ceramics. 19…”

“…In our previous work, although 0.7BFBT textured ceramic showed rapid poling characteristics, its d 33 value was not significantly enhanced compared to those of random samples. 19 Poor insulation properties are one of the key issues for BF-based ceramics. According to previous reports, the modulation of oxygen vacancies can be achieved by atmospheric sintering and quenching methods.…”