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

2016
Authors
Obradović, Nina
Filipović, Suzana

Djordjević, Nataša
Kosanović, Darko

Pavlović, Vladimir

Olcan, Dragan

Djordjević, Antonije
Kachlik, Martin
Maca, Karel

Article (Published version)
Metadata
Show full item recordAbstract
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 (epsilon(r)) and loss tangent (tan delta) as a function of time of mechanical treatment.
Keywords:
Mechanical activation / Two-step sintering / Microstructure / Electrical properties / CordieriteSource:
Science of Sintering, 2016, 48, 2, 157-165Publisher:
- Međunarodni Institut za nauku o sinterovanju, Beograd
Funding / projects:
- Grant agency of the Czech RepublicGrant Agency of the Czech Republic [15-06390S]
- Ministry of Education, Youth and Sports of the Czech Republic under the project CEITEC [LQ1601]
- Directed synthesis, structure and properties of multifunctional materials (RS-172057)
- Algorithms and software for frequency-domain and time-domain simulations of RF subsystems and electromagnetic sensors in ICT (RS-32005)
DOI: 10.2298/SOS1602157O
ISSN: 0350-820X