Investigating triaxial electrical properties of ceramic composites for electroporcelain insulators

A. N.N. Dowuona, A. Yaya, E. Nyankson, J. K. Efavi, L. N.W. Damoah, D. Dodoo-Arhin, V. Apalangya, E. Annan, E. K. Tiburu, B. Onwona-Agyeman, B. Tomiczek

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Four porcelain composites comprising kaolin (27-37%), beach sand (20-24%), ball clay (13-18%) and feldspar (25-40%), were formulated and characterized using powder XRD, SEM and particle size distribution analysis in order to determine their potential for use as electroporcelain insulators. Chemical, mechanical and electrical properties were also evaluated. Each of the formed samples were compressed at 200 MPa and sintered at 1250 °C for 1 hour. Bending strength results of the porcelain bodies showed increase in bending strength with reduction in particle sizes. An increase in dielectric strength was found for samples with a higher felspar content. The XRD pattern for all the sintered samples showed the presence of quartz and mullite phases in the body at different intensities. Samples with lower particle sizes showed similar electrical and mechanical properties to commercially available electroporcelains albeit at a cheaper cost of production.

Original languageEnglish
Pages (from-to)95-100
Number of pages6
JournalJournal of Ceramic Processing Research
Volume19
Issue number2
Publication statusPublished - 2018

Keywords

  • Ball milling
  • Electroporcelains
  • Particle sizes
  • SEM
  • XRD

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