Abstract
Piezoceramics with composition (1–z) [Bi0.5(Na0.84K0.16)0.5TiO3]0.96–0.04SrTiO3–zLiTaO3 (z = 0.00–0.030) were formulated by ordinary firing process following by rapid quenching treatment. Effect of LiTaO3 on the structural, electrical and energy-storage properties were analyzed. For the composition with molar ratio 0.025, room temperature large-field piezoelectric coefficient (Smax/Emax = d33*) of 885 pm/V at 3.6 kV/mm was recorded. Furthermore, for compositions z = 0.025 and 0.030, broad temperature stable dielectric constants and low losses from ~135 to 350 °C with a small variation of ± 15% was observed. Additionally, the energy density for z = 0.025 was ~0.60 J/cm3 in the broader temperature range of 75–125 °C, along with the energy-storage efficiency of greater than 70%. These observations suggest that the studied piezo-material compositions are promising for the ceramic actuators and capacitor applications.
| Original language | English |
|---|---|
| Pages (from-to) | 15710-15721 |
| Number of pages | 12 |
| Journal | Ceramics International |
| Volume | 47 |
| Issue number | 11 |
| DOIs | |
| State | Published - 1 Jun 2021 |
| Externally published | Yes |
Keywords
- Electric field-induced strain
- Energy storage density
- Lead-free
- Quenching treatment
- Stable dielectrics