Microstructural and Electrical Properties of Cordierite-based Ceramics Obtained After Two-step Sintering Technique

  • Nina Obradović Institute of Technical Sciences of SASA
  • Suzana Filipović Institute of Technical Sciences of SASA
  • Nataša Đorđević Institute for Technology of Nuclear and Other Raw Mineral Materials
  • Darko Kosanović Institute of Technical Sciences of SASA
  • Vladimir Pavlović Institute of Technical Sciences of SASA
  • Dragan Olćan School of Electrical Engineering, University of Belgrade
  • Antonije Đorđević School of Electrical Engineering, University of Belgrade; Serbian Academy of Sciences and Arts
  • Martin Kachlik CEITEC BUT, Brno University of Technology
  • Karel Maca CEITEC BUT, Brno University of Technology

Abstract

Cordierite-based ceramic materials are attracting much interest for their various applications in industry, for manufacturing multilayer circuit boards, catalytic converters, filters, thermal insulation, kiln furniture, components of portable electronic devices, etc. In order to reduce production costs and modify cordierite-based materials, mechanical activation can be used. In this study, microstructural and electrical properties of mechanically activated MgO-Al2O3-SiO2 system have been analyzed. The mixtures of MgO-Al2O3-SiO2 powders were mechanically activated in a planetary ball mill for the time periods from 0 to 160 min. Morphological investigations have been performed on the obtained powders. The effects of activation and two-step sintering process on microstructure were investigated by scanning electron microscopy (SEM). Electrical measurements showed variations of the dielectric constant (εr) and loss tangent (tan δ) as a function of time of mechanical treatment.

Published
2017-12-13
Issue
Vol 48 No 2 (2016)
Section
Articles

Copyright 

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