Average Dielectric Constant of Coated Spheres: Application to the IR Absorption Spectra of NiO and MgO

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An analytical expression has been obtained for the average dielectric constant of a sample consisting of small coated spheres interspersed in a matrix, by solving the static boundary value problem and averaging the values of the electric field and polarization over the whole of the sample. Absorption IR data of MgO and NiO samples of this kind, produced by spray pyrolysis, embedded in a KBr matrix, are presented, and the theory developed is employed to fit the observed spectra.

Keywords: Infrared

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702934067757

Affiliations: Instituto de Ciencia de Materiales, C.S.I.C., c. Serrano 115 dpdo., 28006 Madrid, Spain

Publication date: August 1, 1993

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