High piezoelectric response in lead free 0.9BaTiO 3 -(0.1- x )CaTiO 3 - x BaSnO 3 solid solution

Design of lead-free BCZT-based ceramics with enhanced piezoelectric energy harvesting performances

“…The maximum value of 190 pm V −1 was found at 30 °C in 0.2BTSn ceramics, which can be attributed to the vanishing anisotropic polarization and weak energy barriers at the O–T coexistent phase boundary near room temperature, as well as greater mobility of the domain walls leading to an extremely “soft” piezoceramic, as reported in previous studies. 16,36,51,59 With increasing temperature, a gradual decrease in was observed for all compositions, which can be attributed to the transition from the ferroelectric to the paraelectric phase. It is worth noting that the slightly stable values are due to the successive phase transitions.…”

“…50 The small E c values might be related to the coexistence of the O–T phase, which leads to an instability of the polarization state compared to the sole presence of the T-phase. 51 Besides, the room-temperature J–E hysteresis loops of x BTSn are shown in Fig. 6b.…”

Recent progress in piezoelectric thin films as self-powered devices: material and application

“…Figure 2E illustrates the schematic structure of AlN crystals (Fei et al, 2018). Commonly used lead-free piezoelectric systems include KNN-BNT, KNN-BT, BNT-BT, BKT-BT, BNT-BT-KNN, and BNT-BKT (Mayamae et al, 2017;Zhang et al, 2022a;Wang et al, 2022;Safari et al, 2023;Tai et al, 2023). The S-E strain in (K, Na) NbO 3 polycrystalline is enhanced by solid solution near phase border, which undergoes a phase transition, as shown in Figure 2F.…”

A critical review: the impact of electrical poling on the longitudinal piezoelectric strain coefficient

“…With poling conditions of 40 kV cm −1 , room temperature, and 30 min, enhanced piezoelectric properties of k p = 41.7%, d 33 = 469 pC N −1 and were achieved for the x = 0.05 BS content and an electric field of 10 kV cm −1 under ambient conditions near the orthorhombic–tetragonal (T–O) phase transition. 169 Similarly, Chen et al proposed higher d 33 = 650 pC N −1 , k P = 59.6%, and P r = 10.2 μC cm −2 , which were attained by doping Y 3+ ( x = 0.03) in the BCTS ceramic near the morphological phase boundary with poling conditions of 35 kV cm −1 at room temperature for 15 min. 170 Recently, d’Ambrogio et al fabricated a BaTiO 3 –PDMS based piezoelectric sensor for the diagnosis of coronary stenosis by adopting the novel technique dielectrophoresis, and showed that the BaTiO 3 –PDMS bio-sensor exhibited higher piezoelectric properties for a high-temperature range and with a lower poling field of 25 V μm −1 compared with PVDF-based polymers (60 V μm −1 ) at 80 °C for 30 min.…”