1. Repositorio Digital
2. Scientific Electronic Library Online México
3. Física
4. Revista Mexicana de Física

Título:	Non-destructive measurement of the dielectric constant of solid samples
Palabras clave:	Capacitance measurements dielectric constant pointer electrode materials characterization
Fecha de publicación:	31-Jul-2012
Editorial:	Revista mexicana de física
Descripción:	We discuss and analyze a practical methodology for the determination of the dielectric constant of a macroscopic solid sample in a nondestructive way. The technique consists in measuring the capacitance between a pointer electrode and the dielectric surface as a function of the separation distance in a scale comparable to the radius of curvature of the tip's apex. The changes in capacitance that must be measured will commonly be in the atto-farad scale and require specialized instrumentation which we also describe here. The technique requires two calibration standards and the sample needs to have a portion of its surface flat and some minimum dimensions, but otherwise it can have an arbitrary shape. We used a simple model based on the method of images to explain the methodology and present experimental results with the proposed methodology.
Other Identifiers:	http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S0035-001X2009000600012
Aparece en las Colecciones:	Revista Mexicana de Física

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