Strong piezoelectricity of Li2CO3-doped BiFeO3–BaTiO3–Bi(Zn0.5Ti0.5)O3 lead-free piezoelectric ceramics with high Curie temperature and high temperature stability

The (1 − x)BiFeO3–xBaTiO3–Bi(Zn0.5Ti0.5)O3 high-temperature lead-free piezoelectric ceramics with strong piezoelectric properties

“…BFBT-BZT+MnO 2 ternary solid solution reduces the dielectric loss and improves the temperature stability of ceramics [16][17][18]. Li 2 CO 3 is a conventional sintering aid, when Li 2 CO 3 was added into ceramics, which promotes ceramic sintering and makes BFBT-BZT+MnO 2 ceramics dense [19][20][21][22].…”

Boosting the High Performance of BiFeO3-BaTiO3 Lead-Free Piezoelectric Ceramics: One-Step Preparation and Reaction Mechanisms

“…The enhanced piezoelectric and ferroelectric properties are related to the pinning of the domain wall by β-Bi 2 O 3 , i.e., domain motion occurred easily after impurities were eliminated . A comparison of the maximum d 33 values for various BF- x BT-based piezoceramics with respect to their T sint (Figure d) indicates that our B (1+ y ) F-0.3BT (−0.01 ≤ y ≤ 0.02) ceramics outperformed almost all BF- x BT-based piezoceramics at T sint ≤ 970 °C. − ,,− The exception is when BF-0.3BT was sintered above 1000 °C, which provided a slightly higher d 33 of 214 pC/N than those of our ceramics, but its preparation technology is more complicated than our one-step preparation, in addition to its high T sint .…”

“…Room-temperature electrical properties of B 1.02 F- x BT (0.25 ≤ x ≤ 0.33) ceramics: (a–c) P – E curves, bipolar S – E loops, and unipolar S – E loops; (d) d 33 and T sint of various BF- x BT-based piezoelectric ceramics using the conventional solid-state method with a furnace-cooling technique; the red solid circle is from this work, and the open symbols and the digits in panel (d) are from references. − ,,− …”

“…The effects of Li 2 CO 3 and CuO on T sint and other properties were investigated in 0.7BiFeO 3 -0.3BaTiO 3 -0.0035MnCO 3 + 0.002Li 2 CO 3 + x CuO, which achieved a low T sint of 930 °C and a moderate d 33 of 168 pC/N . When 3% Li 2 CO 3 was added to BiFeO 3 -BaTiO 3 -Bi­(Zn 0.5 Ti 0.5 )­O 3 as a sintering assistant, d 33 improved to 184 from 166 pC/N at T sint = 970 °C . However, the addition of a sintering assistant made it difficult to tailor the phase structure and regulate defects.…”

High Curie Temperature BiFeO3-BaTiO3 Lead-free Piezoelectric Ceramics: Ga3+ Doping and Enhanced Insulation Properties

“…Besides, the use of stability elements, like La, Ga, Bi(Zn1/2Ti1/2)O3 and Nd etc., to replace A and/or B site of BF is also effective to enhance the electrical performance of (1-x)BF-xBT ceramics [23][24][25][26]. It is reported that the water quenched BF-33BT-3BiGaO3 ceramic exhibited excellent piezoelectric properties d33=402 pC•N -1 with high TC=454 °C, which attributes to the low J=1×10 -10 A•cm -2 under the electric field of 50 kV•cm -1 [21].…”