1980
DOI: 10.1080/16070658.1980.11689212
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Frequency Dependence of the Dielectric Properties of Coal

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Cited by 32 publications
(3 citation statements)
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“…Ergun and Bean (1968) found that conversion of only 0.5% of pyrite (FeS2) to pyrrhotite would be sufficient to produce an apparent magnetic susceptibility of 10 or more (Ergun and Bean, 1968). They also proposed that high-frequency heating of coal might achieve selective absorption by pyrite and partial conversion Nelson et al (1981) noticed that the dielectric loss factor of a dense pyrite bearing portion separated from coal with high sulfur content increases with microwave frequency (Nelson et al, 1981). Bluhm et al (1986) investigated the variation of apparent magnetic susceptibility during the microwave heating.…”
Section: mentioning
confidence: 99%
“…Ergun and Bean (1968) found that conversion of only 0.5% of pyrite (FeS2) to pyrrhotite would be sufficient to produce an apparent magnetic susceptibility of 10 or more (Ergun and Bean, 1968). They also proposed that high-frequency heating of coal might achieve selective absorption by pyrite and partial conversion Nelson et al (1981) noticed that the dielectric loss factor of a dense pyrite bearing portion separated from coal with high sulfur content increases with microwave frequency (Nelson et al, 1981). Bluhm et al (1986) investigated the variation of apparent magnetic susceptibility during the microwave heating.…”
Section: mentioning
confidence: 99%
“…Dielectric properties of cereal grains, seed, and powdered or pulverized material have been determined with various microwave measurement systems assembled for such measurements. Twenty-one-mm, 50-Ω coaxialline systems were used for these measurements at frequencies from 1 to 5.5 GHz (Nelson, 1973b;Nelson et al, 1980. A 54-mm, 50-Ω coaxial sample holder, designed for minimal reflections from the transition, was used with this same system for measurements on largerkernel cereals such as corn (Nelson, 1978(Nelson, , 1979b.…”
Section: Definitions and Principlesmentioning
confidence: 99%
“…It has to be able to measure the phase shift and the attenuation of a microwave signal that is transmitted through coal on a conveyor belt, as well as the mass per unit area of that coa1[11, 12,13].…”
Section: Introductionmentioning
confidence: 99%