Ceramics-Silikáty 68, (1) 1 - 6 (2024) |
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EFFECT OF Al₂O₃ ADDITIONS ON THE DIELECTRIC PROPERTIES OF A PORCELAIN INSULATOR PREPARED FROM ECONOMICAL NATURAL RAW MATERIALS
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Kasrani Souad 1, Harabi Abdelhamid 2
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1 Faculty of Matter Science, Physic Department, Batna1-University, Batna 05000, Algeria.
2 Faculty of Exact Science, Physic Department, Constantine- University ,25000 Constantine, Algeria.
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Keywords: Porcelain Insulator, Al₂O₃ additions, Dielectric Properties
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The aim of this work was to determine the effect of an Al₂O₃ addition on the dielectric properties of a porcelain insulator prepared from local Algerian raw materials. The new selected composition was 45 wt% kaolin, 30 wt% potash-feldspar and 25 wt% quartz. In order to find a relationship between the properties and the sample microstructures, the samples were analysed by SEM analysis, X-ray diffraction and Raman spectroscopy. The optimum sintering conditions gave a higher bulk density (2.50 g.cm−3). Dielectric measurements of porcelain insulator were carried out at 1 KHz from room temperature to 200 °C. The dielectric constant, loss factor, dielectric loss tangent and resistivity of the porcelain insulator sample containing 8 wt% Al₂O₃ sintered at 1160 °C for 2 h were: 45-50, 0.14-2.48, 0.005-0.08, and 0.9- 9 x 1013 W.cm, respectively. The value of the dielectric constant was significantly high when compared to that of that of conventional porcelains, which did not exceed generally 9.
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doi: 10.13168/cs.2023.0055
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