Dielectric constant of particles determined by impedance spectroscopy [abstract]

Abstract

A method of measuring the dielectric constant of a powder, including selecting a powder having an unknown first dielectric constant, selecting a liquid having a known second dielectric constant, and introducing a predetermined amount of powder into a predetermined volume of liquid to define a slurry characterized by a known volume fraction of powder. The impedance spectra of the slurry are plotted over a predetermined frequency range, the measured dielectric constant data is read and the appropriate equivalent circuit for the slurry is determined. Appropriate equivalent circuit equations are applied to the measured dielectric constant data and the first dielectric constant is calculated from the appropriate equivalent circuit equations, known volume fraction of powder and measured dielectric constant data. Potential Areas of Applications: * Manufacturing of capacitor, microwave, packaging, multilayer co-fire, thin film, and high temperature dielectrics * Bluetooth dielectric resonator antennae * Dielectric research and developmentPatent Status: US Utility Patent Application AllowedInventor(s): Vladimir Petrovsky, Fatih DoganContact Info: Keith Strassner, kdstrass@mst.edu; 573-341-6725 Eric Anderson, ericwa@mst.edu; 573-341-4551 Vera Anderson, vera@mst.edu; 573-341-7263