Analysis of dielectric measurements in the presence of a small departure from Debye behavior

Edward H. Grant

doi:10.1021/j100846a067

Traceable dielectric measurements by resonance methods in the frequency range 1–30 MHz

IEE Proceedings A Science Measurement and Technology ◽

10.1049/ip-a-3.1993.0059 ◽

1993 ◽

Vol 140 (5) ◽

pp. 382 ◽

Cited By ~ 1

Author(s):

G.J. Hill

Keyword(s):

Dielectric Measurements ◽

Frequency Range

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The Determination of the Magnetoelectric Coupling Coefficient in Ferroelectric–Ferromagnetic Composite Based on PZT–Ferrite

Archives of Metallurgy and Materials ◽

10.2478/amm-2013-0183 ◽

2013 ◽

Vol 58 (4) ◽

pp. 1401-1403 ◽

Cited By ~ 3

Author(s):

J.A. Bartkowska ◽

R. Zachariasz ◽

D. Bochenek ◽

J. Ilczuk

Keyword(s):

Dielectric Permittivity ◽

Coupling Coefficient ◽

Mean Field ◽

Field Approximation ◽

Theoretical Description ◽

Magnetoelectric Coupling ◽

Mean Field Approximation ◽

Dielectric Measurements ◽

Temperature Dependences ◽

Multiferroic Composite

Abstract In the present work, the magnetoelectric coupling coefficient, from the temperature dependences of the dielectric permittivity for the multiferroic composite was determined. The research material was ferroelectric-ferromagnetic composite on the based PZT and ferrite. We investigated the temperature dependences of the dielectric permittivity (") for the different frequency of measurement’s field. From the dielectric measurements we determined the temperature of phase transition from ferroelectric to paraelectric phase. For the theoretical description of the temperature dependence of the dielectric constant, the Hamiltonian of Alcantara, Gehring and Janssen was used. To investigate the dielectric properties of the multiferroic composite this Hamiltonian was expressed under the mean-field approximation. Based on dielectric measurements and theoretical considerations, the values of the magnetoelectric coupling coefficient were specified.

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Integrated, Multi-Scale Characterization of Imbibition and Wettability Phenomena Using Magnetic Resonance and Wide-Band Dielectric Measurements

10.2172/927607 ◽

2007 ◽

Author(s):

Mukul M. Sharma ◽

Steven L. Bryant ◽

Carlos Torres-Verdin ◽

George Hirasaki

Keyword(s):

Magnetic Resonance ◽

Wide Band ◽

Dielectric Measurements ◽

Multi Scale ◽

Scale Characterization

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Minnesota Department of Transportation Case Studies for Coreless Asphalt Pavement Compaction Assessment

Transportation Research Record Journal of the Transportation Research Board ◽

10.1177/0361198120907582 ◽

2020 ◽

Vol 2674 (2) ◽

pp. 291-301 ◽

Cited By ~ 1

Author(s):

Kyle Hoegh ◽

Trevor Steiner ◽

Eyoab Zegeye Teshale ◽

Shongtao Dai

Keyword(s):

Quality Assurance ◽

Ground Truth ◽

Calibration Method ◽

Field Trials ◽

Asphalt Pavements ◽

Attractive Potential ◽

Dielectric Measurements ◽

Statistical Measures ◽

Gyratory Compaction ◽

Air Void

Available methods for assessing hot-mix-asphalt pavements are typically restricted to destructive methods such as coring that damage the pavement and are limited in coverage. Recently, density profiling systems (DPS) have become available with the capability of measuring asphalt compaction continuously, giving instantaneous measurements a few hundred feet behind the final roller of the freshly placed pavement. Further developments of the methods involved with DPS processing have allowed for coreless calibration by correlating dielectric measurements with asphalt specimens fabricated at variable air void contents using superpave gyratory compaction. These developments make DPS technology an attractive potential tool for quality control because of the real-time nature of the results, and quality assurance because of the ability to measure a more statistically significant amount of data as compared with current quality assurance methods such as coring. To test the viability of these recently developed methods for implementation, multiple projects were selected for field trials. Each field trial was used to assess the coreless calibration prediction by comparing with field cores where dielectric measurements were made. Ground truth core validation on each project showed the reasonableness of the coreless calibration method. The validated dielectric to air void prediction curves allowed for assessment of the tested pavements in relation to as-built characteristics, with the DPS providing the equivalent of approximately 100,000 cores per mile. Statistical measures were used to demonstrate how DPS can provide a comprehensive asphalt compaction evaluation that can be used to inform construction-related decisions and has potential as a future quality assurance tool.

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