ANISOTROPIC ELECTRICAL PROPERTIES OF COAL.

Constantine Balanis, W. Shepard Phillip, Francis T C Ting, William F. Kardosh

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Use was made of a two-path interferometer at microwave frequencies (9 GHz) to measure the dielectric constant and conductivity of coal as a function of direction of propagation and polarization of the electromagnetic wave within the coal. Four types of eastern bituminous coal of various rank and one type of eastern anthracite coal were studied. The effects of physical properties (rank and anisotropy, pyrite concentration) on the conductivity and dielectric constant were investigated. In general, moisture increases the conductivity and dielectric constant: however, pyrite layers along the bedding planes of the bituminous coals cause a general increase in conductivity. The anthracites (higher rank coals) have larger values of conductivity (about a factor of 10) and permittivity (about a factor of 2 to 3) than the bituminous (lower rank) coals. Models of optical anisotropy seem to correlate with the anisotropy of the electrical properties of anthracites. No distinct relationship was found between the direction of propagation and the electrical properties.

Original languageEnglish (US)
Pages (from-to)250-256
Number of pages7
JournalIEEE Transactions on Geoscience and Remote Sensing
VolumeGE-18
Issue number3
StatePublished - Jul 1980
Externally publishedYes

Fingerprint

electrical property
Coal
coal
Electric properties
conductivity
electrical properties
anthracite
Anthracite
Permittivity
coal rank
anisotropy
bituminous coal
Bituminous coal
Pyrites
permittivity
pyrite
Anisotropy
pyrites
Optical anisotropy
bedding plane

ASJC Scopus subject areas

  • Computers in Earth Sciences
  • Geochemistry and Petrology
  • Geophysics
  • Electrical and Electronic Engineering

Cite this

Balanis, C., Shepard Phillip, W., Ting, F. T. C., & Kardosh, W. F. (1980). ANISOTROPIC ELECTRICAL PROPERTIES OF COAL. IEEE Transactions on Geoscience and Remote Sensing, GE-18(3), 250-256.

ANISOTROPIC ELECTRICAL PROPERTIES OF COAL. / Balanis, Constantine; Shepard Phillip, W.; Ting, Francis T C; Kardosh, William F.

In: IEEE Transactions on Geoscience and Remote Sensing, Vol. GE-18, No. 3, 07.1980, p. 250-256.

Research output: Contribution to journalArticle

Balanis, C, Shepard Phillip, W, Ting, FTC & Kardosh, WF 1980, 'ANISOTROPIC ELECTRICAL PROPERTIES OF COAL.', IEEE Transactions on Geoscience and Remote Sensing, vol. GE-18, no. 3, pp. 250-256.
Balanis C, Shepard Phillip W, Ting FTC, Kardosh WF. ANISOTROPIC ELECTRICAL PROPERTIES OF COAL. IEEE Transactions on Geoscience and Remote Sensing. 1980 Jul;GE-18(3):250-256.
Balanis, Constantine ; Shepard Phillip, W. ; Ting, Francis T C ; Kardosh, William F. / ANISOTROPIC ELECTRICAL PROPERTIES OF COAL. In: IEEE Transactions on Geoscience and Remote Sensing. 1980 ; Vol. GE-18, No. 3. pp. 250-256.
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