2014
DOI: 10.2478/amm-2014-0117
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Measurement of Electrical Properties as Effectiveness Appraisal of Microwave Absorption by Moulding and Core Sands Subject to Microwave Utilization

Abstract: Within the research, carried-out were examinations of foundry rejects in form of waste moulding and core sands in order to determine effectiveness of the microwave utilization process. Presented are measurements of permittivity and loss tangent that determine behaviour of materials in electromagnetic field. Measurements were performed on a stand of waveguide resonance cavity that permits precise determination of the above-mentioned parameters with the perturbation method. Examination results of five waste moul… Show more

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“…Samples with a diameter of 16 mm and a height of 43 mm were prepared for testing. In the paper [19] it was shown that the value ε r of synthetic moulding sands depends on apparent packing degree. For this reason, on the basis of weight and volume measurements of each of the packed fittings, the apparent packing degree was determined, which ranged from 1,420 to 1,580 kg/m 3 depending on the composition of the sand.…”
Section: Methodology and Test Standmentioning
confidence: 99%
“…Samples with a diameter of 16 mm and a height of 43 mm were prepared for testing. In the paper [19] it was shown that the value ε r of synthetic moulding sands depends on apparent packing degree. For this reason, on the basis of weight and volume measurements of each of the packed fittings, the apparent packing degree was determined, which ranged from 1,420 to 1,580 kg/m 3 depending on the composition of the sand.…”
Section: Methodology and Test Standmentioning
confidence: 99%