Dielectric properties of porous zinc oxide ceramics

J. P. Calame; Y. Carmel; D. Gershon; A. Birman; L. P. Martin; D. Dadon; M. Rosen

doi:10.1557/proc-430-273

Dielectric properties of porous zinc oxide ceramics

J. P. Calame, Y. Carmel, D. Gershon, A. Birman, L. P. Martin, D. Dadon, M. Rosen

Research output: Contribution to journal › Conference article › peer-review

2 Scopus citations

Abstract

Measurements of the complex dielectric constant of microwave sintered, porous ZnO at 2.45 GHz are presented. The dielectric properties as a function of porosity do not obey the standard Maxwell-Garnet dielectric mixing law with the ceramic material as the major phase, but instead behave as if the ceramic grains always remain in relatively poor electrical contact even at very high densities. Electromagnetic simulations, carried out for a variety of microstructure geometries, are performed to explore this observation. A model which treats the ceramic as an array of grains and pores, with the grains separated from each other by non- or slightly-percolating, fractal-geometry surfaces, provides a good description of the experimental results.

Original language	English
Pages (from-to)	273-278
Number of pages	6
Journal	Materials Research Society Symposium - Proceedings
Volume	430
DOIs	https://doi.org/10.1557/proc-430-273
State	Published - 1 Jan 1996
Externally published	Yes
Event	Proceedings of the 1996 MRS Spring Symposium - San Francisco, CA, USA Duration: 8 Apr 1996 → 12 Apr 1996

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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@article{3639af15b54044bbbf74c46aa3581aac,

title = "Dielectric properties of porous zinc oxide ceramics",

abstract = "Measurements of the complex dielectric constant of microwave sintered, porous ZnO at 2.45 GHz are presented. The dielectric properties as a function of porosity do not obey the standard Maxwell-Garnet dielectric mixing law with the ceramic material as the major phase, but instead behave as if the ceramic grains always remain in relatively poor electrical contact even at very high densities. Electromagnetic simulations, carried out for a variety of microstructure geometries, are performed to explore this observation. A model which treats the ceramic as an array of grains and pores, with the grains separated from each other by non- or slightly-percolating, fractal-geometry surfaces, provides a good description of the experimental results.",

author = "Calame, {J. P.} and Y. Carmel and D. Gershon and A. Birman and Martin, {L. P.} and D. Dadon and M. Rosen",

year = "1996",

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TY - JOUR

T1 - Dielectric properties of porous zinc oxide ceramics

AU - Calame, J. P.

AU - Carmel, Y.

AU - Gershon, D.

AU - Birman, A.

AU - Martin, L. P.

AU - Dadon, D.

AU - Rosen, M.

PY - 1996/1/1

Y1 - 1996/1/1

N2 - Measurements of the complex dielectric constant of microwave sintered, porous ZnO at 2.45 GHz are presented. The dielectric properties as a function of porosity do not obey the standard Maxwell-Garnet dielectric mixing law with the ceramic material as the major phase, but instead behave as if the ceramic grains always remain in relatively poor electrical contact even at very high densities. Electromagnetic simulations, carried out for a variety of microstructure geometries, are performed to explore this observation. A model which treats the ceramic as an array of grains and pores, with the grains separated from each other by non- or slightly-percolating, fractal-geometry surfaces, provides a good description of the experimental results.

AB - Measurements of the complex dielectric constant of microwave sintered, porous ZnO at 2.45 GHz are presented. The dielectric properties as a function of porosity do not obey the standard Maxwell-Garnet dielectric mixing law with the ceramic material as the major phase, but instead behave as if the ceramic grains always remain in relatively poor electrical contact even at very high densities. Electromagnetic simulations, carried out for a variety of microstructure geometries, are performed to explore this observation. A model which treats the ceramic as an array of grains and pores, with the grains separated from each other by non- or slightly-percolating, fractal-geometry surfaces, provides a good description of the experimental results.

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U2 - 10.1557/proc-430-273

DO - 10.1557/proc-430-273

M3 - Conference article

AN - SCOPUS:0030380748

SN - 0272-9172

VL - 430

SP - 273

EP - 278

JO - Materials Research Society Symposium - Proceedings

JF - Materials Research Society Symposium - Proceedings

T2 - Proceedings of the 1996 MRS Spring Symposium

Y2 - 8 April 1996 through 12 April 1996

ER -

Dielectric properties of porous zinc oxide ceramics

Abstract

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