Abstract
The structure of the composition has a significant impact on the targeted expected properties. To achieve tailored expected properties, it is necessary to design the structure of the composition in such a scientific way to satisfy the optimal predicted properties. This study demonstrates a scientific approach to tailoring composition in dielectric ceramics to achieve high energy storage density. Attaining enhanced energy storage performance in such materials is feasible by optimizing key factors, including the development of narrow ferroelectric hysteresis loops with elevated saturation polarization (PS) and achieving high breakdown strength (BDS). Notably, the formation of slim hysteresis loops with substantial (PS) is closely linked to the coexistence of multiple nanoscale polymorphic phases (NPP) and local structural disorder, while a high BDS is primarily influenced by densely packed, fine-grained microstructures. In this study, heterovalent cations with a general formula of X(Y1,Y2)O3 = Ca(Zn0.5Zr0.5)O3 (CZZ) were introduced into the starting morphotropic phase boundary (MPB) (Bi0.5Na0.5)0.7Sr0.3TiO3 - 0.06 BaTiO3 (BNSBT) composition. The starting (MPB) composition already has high (Ps) and a relatively slim P-E loops. Consequently, linear-like narrow ferroelectric hysteresis loops with high (Ps) and high (BDS) were obtained due to the generation of (NPP) and local structural heterogeneity. Consequently, the optimum (BNSBT – 0.17CZZ) sample showed excellent overall energy storage characteristics, such as (Wrec = 5.146 J/cm3, η = 80.3 %, PD = 426 MW/cm3, CD = 3157 A/cm2, WD = 3.02 J/cm3, t0.9 = 33 ns) respectively. In addition, good thermal stability in charge/discharge properties up to 140 °C with < 16 % variation was also recorded for the optimum sample. We expect that the composition design scheme reported in this work could be helpful for a scientist to utilize it for high pulse power technology applications.
| Original language | English |
|---|---|
| Article number | 185156 |
| Journal | Journal of Alloys and Compounds |
| Volume | 1048 |
| DOIs | |
| State | Published - 10 Dec 2025 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2025 Elsevier B.V.
Keywords
- Aliovalent ions
- Ceramic capacitors
- Composition design strategy
- Disorderedness and local random field
- Polymorphic nano polar regions
- Thermal stability
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry