Tailoring depolarization temperature by phase transition causing properties evolution in Bi0.5(Na1-K )0.5TiO3 ceramics

Realizing an Ultrahigh Depolarization Temperature near the Curie Point and Large d33 with Superior Temperature Stability in Lead-Free Ceramics via a Sandwich Structure Design

“…Furthermore, the mitigated d 33 −T d conflict is generally at the expense of the piezoelectric response 14−19 and the thermal stability of real-time d 33 . 23,26−28 To characterize the variation of real-time d 33 in the temperature range of 30 from 90 to 246 °C by tailoring the P4mm/P4bm ratio in BNTbased ceramics, but increased T d is at the cost of high T tc and low d 33 . 30 Despite the fact that T tc can be significantly improved through engineering the layered distribution of dopants without deteriorating d 33 , T d is still much lower than T m .…”

“…23,26−28 To characterize the variation of real-time d 33 in the temperature range of 30 from 90 to 246 °C by tailoring the P4mm/P4bm ratio in BNTbased ceramics, but increased T d is at the cost of high T tc and low d 33 . 30 Despite the fact that T tc can be significantly improved through engineering the layered distribution of dopants without deteriorating d 33 , T d is still much lower than T m . 31 Therefore, there is still a severe challenge in lead-free piezoceramics for simultaneously attaining T d near the Curie point and relatively large d 33 as well as ultralow T tc in a facile and effective manner.…”

Simultaneously enhancing the Td and the thermal stability of the real‐time d33 in BNT‐based piezoceramics

“…Recently, Yang et al found that the conflict between the elevation of T d and the thermal stability of the real-time d 33 could be mitigated by regulating the P4mm/P4bm ratio in BNT-based ceramics, yet the increase of T d was still accompanied by the poor thermal stability. 11 Although superior thermal stability of the real-time d 33 was obtained through constructing successive phase transitions in multilayer composites, the d 33 maintained temperature-independent only from 25 to 100 • C, which restrained the practical application of the materials. 12 As a thumb of rule, an increment of T d was achieved usually at the expense of thermal stability of the real-time d 33 .…”

“…12 As a thumb of rule, an increment of T d was achieved usually at the expense of thermal stability of the real-time d 33 . [11][12][13][14] Therefore, it is still a challenging issue to simultaneously elevate the T d and increase the thermal stability for the real-time d 33 in the industrial development of lead-free piezoceramics.…”

“…Although superior thermal stability of the real‐time d 33 was obtained through constructing successive phase transitions in multilayer composites, the d 33 maintained temperature‐independent only from 25 to 100°C, which restrained the practical application of the materials 12 . As a thumb of rule, an increment of T d was achieved usually at the expense of thermal stability of the real‐time d 33 11–14 . Therefore, it is still a challenging issue to simultaneously elevate the T d and increase the thermal stability for the real‐time d 33 in the industrial development of lead‐free piezoceramics.…”