Method for determining the dielectric constant of particles
US7821269B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Jun 7, 2008 |
| Grant date | Oct 26, 2010 |
| Priority date | — |
| Expiry date | Apr 28, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/0091
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.