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Differences in phase, microstructural, and electrical characteristics of quartz-substituted alumina porcelain insulator

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Abstract

In the present study, total quartz content (30 wt%) of a standard porcelain body was progressively substituted with two different kinds of aluminas (active alumina and calcined alumina) keeping active alumina constant at 5 wt% and varying calcined alumina content to the extent of 5–25 wt%. The alumina incorporated compositions (AP1 to AP7), along with the standard quartz containing porcelain body (SP0), were processed following common ceramic processing techniques. Two types of forming techniques were used to make samples, namely extrusion of plastic mass to get cylinder of desired dimensions and the other one was hydraulic compaction to produce rectangular bars. The extruded and compacted samples were properly dried and then heated in an electrically operated furnace in the temperature range of 1170–1260 °C. The fully densified samples heated at 1260 °C were subjected to various tests, namely phase identification by X-ray diffraction (XRD) pattern studies; scanning electron microscopic (SEM) analysis; and measurement for electrical properties such as dielectric strength (kV/mm), dielectric loss (tanδ), electrical resistivity (ohm-cm), and dielectric constant to confirm suitability of the samples for application in high-tension power transmission system. The results revealed that the body AP6, wherein 25 wt% quartz was substituted by 5 wt% active alumina and 20 wt% calcined alumina and heated at 1260 °C, may be considered the most suitable sample for porcelain insulator.

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Authors and Affiliations

  1. Prism Johnson Ltd., Pen Plant, District Raigad, Maharashtra, India

    Anil Kumar Kaviraj, Sudipta Saha & Arindam Chakraborty

  2. Aditya Birla Insulator Ltd, Rishra, West Bengal, India

    Gobinda Pahari

  3. Department of Chemical Technology, Ceramic Engg., University of Calcutta, Calcutta, India

    Debjyoti Ray, Tapan Kumar Parya & Swapan Kumar Das

Authors
  1. Anil Kumar Kaviraj
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  2. Sudipta Saha
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  3. Arindam Chakraborty
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  4. Gobinda Pahari
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  5. Debjyoti Ray
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  6. Tapan Kumar Parya
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  7. Swapan Kumar Das
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Correspondence to Anil Kumar Kaviraj.

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Kaviraj, A.K., Saha, S., Chakraborty, A. et al. Differences in phase, microstructural, and electrical characteristics of quartz-substituted alumina porcelain insulator. J Aust Ceram Soc 57, 327–337 (2021). https://doi.org/10.1007/s41779-020-00535-4

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  • DOI: https://doi.org/10.1007/s41779-020-00535-4

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