Dielectric Dispersion in Materials Having a Distribution of Relaxation Times
1952; American Institute of Physics; Volume: 20; Issue: 7 Linguagem: Inglês
10.1063/1.1700675
ISSN1520-9032
Autores Tópico(s)Ferroelectric and Piezoelectric Materials
ResumoOn the basis of considerable experimental evidence, a particular form for the dielectric loss factor, ε″, is assumed to hold for many materials exhibiting a distribution of relaxation times. The dielectric constant, ε′, corresponding to the assumed form of ε″ is then computed by means of the Kronig-Kramers relations and tabulated as a function of log frequency and of the distribution function half-width parameter, α. Using these results, experimental ε′ and ε″ curves can be easily tested for mutual consistency and can be fitted individually. In conclusion, a brief discussion of other methods of dealing with the many-relaxation-time dispersion problem is given.
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