Dielectric Properties of Three Perovskite Oxides Included in Three Types of Polymer Composites

Abstract

Microwave dielectric double perovskite /polymer composites are materials that combine the flexibility of polymer matrices like epoxy, polyurethane, or silicone rubber with unique properties of double perovskite ceramics, such as Ba2ZnWO6, Ba2MgWO6, and Bi2Mo0.5W0.5O6,. These complex oxide ceramics are synthesized using the solid-state reaction technique. The X-ray diffraction analysis (XRD) confirmed the formation of the double perovskite phase with well-defined crystal structures. Utilizing transmission/reflection measurements by a vector network analyzer (VNA) and double perovskite ceramics as filler materials in the polymer matrix, the impact of the complex oxide fillers on the composites' overall dielectric properties was fully measured. In particular, the dielectric properties of the resulting composites, specifically their dielectric loss and dielectric constant, were investigated within the wide frequency range of 4-8 GHz. Better dielectric characteristics, such as a high dielectric constant and a low loss factor, were demonstrated by Ba2ZnWO6, which made it a viable option for use in high-frequency circuits, microwave devices, energy storage components and communication technology. Furthermore, Competitive dielectric qualities were demonstrated by Ba2MgWO6 and Bi2Mo0.5W0.5O6. In addition, the results indicated improved dielectric characteristics, including dielectric constant and loss factor. The resulting composites not only have a lower cost and light weight than ceramics, but they also have a lot of potential uses in the microwave dielectric range. Furthermore, when compared to the other measured composites the Ba2ZnWO6/polymer composites demonstrated superior properties.