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Dielectric Constant of Particles Determined by Impedance Spectroscopy

Detailed Technology Description

None

Supplementary Information

Inventor: Petrovsky, Vladimir | Dogan, Fatih
Priority Number: US7821269B2
IPC Current: G01V000318 | G01R002708 | G01R002726
US Class: 324341 | 324663 | 324707
Title: Method for determining the dielectric constant of particles
Usefulness: Method for determining the dielectric constant of particles
Summary: Method for measuring a dielectric constant of loose ceramic powder for a component of electronic application. Uses include but are not limited to titanium dioxide powder, calcium titanate powder, strontium titanate powder and barium titanate.
Novelty: Dielectric constant measuring method for e.g. ceramic powder for component of electronic application, involves calibrating frequency response portion to known dielectric constant of liquid, and calculating powder dielectric constant

Industry

Electronics

Sub Category

Semiconductor

Others

*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. Next, the impedance spectra of the slurry is 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.

*Principal Investigator

Name: Vladimir Petrovsky, Sr. Research Specialist

Department:

Name: Fatih Dogan, Associate Director, Center for Dielectric Studies, Missouri S&T

Department:

Country/Region

USA