Ceramic–Polymer Ba _0.6 Sr _0.4 TiO ₃ /Poly(Methyl Methacrylate) Composites with Different Type Composite Structures for Electronic Technology

Ba _0.6 Sr _0.4 TiO ₃ (BST)/poly(methyl methacrylate) (PMMA) composites with 0–3, 1–3, and 2–2 type structures were prepared and studied. The effect of composite type on the dielectric properties of BST/PMMA composites was comprehensively investigated by both theoretical and experimental methods. The 1–3 type composite shows the highest permittivity and dielectric tunability, while the 2–2 and 0–3 type composites show lower permittivity as well as lower dielectric tunabilities. The experimentally measured dielectric properties are in agreement with the theoretically calculated values. The results help in understanding and tailoring the dielectric properties of ceramic–polymer composites by choosing a suitable composite structure.