The electrical properties of carbon materials
DOI:
https://doi.org/10.15587/1729-4061.2012.4640Keywords:
specific electrical strength, carbonic residue, unary charge, measurement unit.Abstract
The specific electrical strength of carbonic heat-insulating charge influences considerably the uniformity of electric power distribution in the volume of graphitization furnace that determines the quality of the product and production costs. The article comprises the review of existing information on specific electrical strength of carbonic bulk materials and the methods of their testing. Existing literary information does not confirm with the specific technological conditions in graphitization furnaces. That is why the high-temperature device was made to measure the specific electrical strength of carbonic materials with the particle distribution from 0 to 20 mm and within the applied pressure 1 – 50 kPa. The results obtained are represented as diagrams which show barometric dependence of specific electrical strength for carbon residue with the particles’ size below 10 mm, the temperature dependence of specific electrical strength for unary carbonic mixture with various proportions of raw and tempered carbonic residue, the temperature dependence of the specific electrical strength of raw carbonic residue with diverse size of particles.References
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