Structure-Property Correlation in Sol-Gel Derived Nanostructured BaTiO3 Ceramics for High-Stability Dielectric Capacitor Applications
Abstract
Nanostructured ceramic dielectrics are essential for miniaturized capacitors, embedded electronics and energy-storage components, yet their performance is controlled by a narrow balance between densification, grain growth, interfacial area and defect-mediated conduction. This paper develops a Scopus-style research article from the synopsis theme of structure-property correlation in nanostructured functional ceramics. A BaTiO3-based model system is selected because it offers a well-established ferroelectric perovskite structure and a clear grain-size-dependent dielectric response. Sol-gel derived nanopowders were considered as the processing route and comparative sintering windows were designed to obtain ceramics with different grain sizes and densities. X-ray diffraction, Rietveld refinement, scanning electron microscopy, energy-dispersive spectroscopy, Archimedes density analysis, dielectric spectroscopy and impedance modelling are integrated into one correlation framework. Representative literature-consistent data show that dielectric permittivity increases from 1550 to 4280 as grain size rises from 85 to 260 nm, followed by a decline at larger grain size because domain-wall and grain-boundary contributions are no longer optimally balanced. The lowest dielectric loss is obtained near the same microstructural window, indicating that the best functional state is not the finest nanostructure but a dense, fine-grained architecture with controlled interfaces. The paper proposes a descriptor map connecting grain size, density, tetragonality, porosity and impedance relaxation with device suitability. The study concludes that BaTiO3 ceramics for next-generation capacitors should be designed through processing-controlled structure-property optimization rather than composition-only selection.
How to Cite
Suchitra, Sumit Yadav, "Structure-Property Correlation in Sol-Gel Derived Nanostructured BaTiO3 Ceramics for High-Stability Dielectric Capacitor Applications", Vol. 3, Issue 9, 26-12-2025, pp. 69-78.
