About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Processing and Performance of Materials Using Microwaves, Electric and Magnetic Fields, Ultrasound, Lasers, and Mechanical Work – Rustum Roy Symposium
|
| Presentation Title |
Finite Element Modeling of Temperature-Dependent Microwave Dielectric Properties in Engineered Particulate Composites |
| Author(s) |
Ansan Pokharel, Divakar Reddy Aireddy, Pranjali Muley, Christina Wildfire, Terence Musho |
| On-Site Speaker (Planned) |
Ansan Pokharel |
| Abstract Scope |
This study develops a finite element approach to predict the temperature-dependent dielectric performance of particulate composites at 2.45 GHz. The analysis specifically examines cerium oxide particles that are both uncoated and perovskite-coated in a coaxial transmission line configuration replicating experimental conditions. Utilizing COMSOL Multiphysics and the Nicolson-Ross-Weir (NRW) technique, the model assesses how variations in particle size, spatial distribution, porosity, and coating thickness affect complex dielectric permittivity. Results indicate larger particle sizes and higher packing densities significantly enhance dielectric responses, driven by increased interfacial polarization and intensified local electric fields. Additionally, perovskite coatings mitigate interfacial impedance mismatches, stabilizing dielectric properties at elevated temperatures. The model predictions closely match experimental observations, providing an effective computational framework for designing and optimizing microwave dielectric materials with tailored temperature-dependent dielectric behaviors. |