DataVXAdvances in Applied CeramicsPaper
journal article·2019-07-04Open access

Processing and properties of dense cordierite ceramics obtained through solid-state reaction and pressure-less sintering

Nina Obradović, Vera Pavlović, Martin Kachlik, Karel Maca, Dragan Olćan, Antonije Đorđević, Ani Tshantshapanyan, Branislav Vlahović, Vladimir Pavlović

Advances in Applied Ceramics· Volume 118· Issue 5
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Source abstract

Abstract

Sintering of pure cordierite 2MgO:2Al2O3:5SiO2, and cordierite with the addition of 5 mass % TeO2 was studied. Green bodies were prepared from powder mixtures mechanically activated in a high-energy planetary mill, shaped by uniaxial (20 MPa) and cold isostatic pressing (1000 MPa). The pressure-less sintering of these specimens was performed at 1350°C for 1 h. High relative density over 95% of the theoretical value was obtained through solid-state reaction and pressure-less sintering of powder activated for 40 min, and for the first time reported in the literature. Phase composition and microstructures of sintered samples were determined by XRD and SEM, coupled with EDS mapping. The real part of the complex relative permittivity of the samples was measured at 200 MHz. The loss tangent of all samples was below the resolution of the measurement setup. A strong correlation between the relative permittivity and the density agrees with previously published data.
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Research context

Ceramics & glasses

OpenAlex topics: Microwave Dielectric Ceramics Synthesis · Ferroelectric and Piezoelectric Materials · Dielectric properties of ceramics

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of Technical Sciences of SASA, Belgrade, Serbia

School of Electrical Engineering, University of Belgrade, Belgrade, Serbia

CEITEC BUT, Brno University of Technology, Brno, Czech Republic

Faculty of Mechanical Engineering, Brno University of Technology, Brno, Czech Republic

Serbian Academy of Sciences and Arts, Belgrade, Serbia

North Carolina Central University, Department of Mathematics and Physics, Durham, NC, USA

Funding

National Science Foundation · National Aeronautics and Space Administration · Grantová Agentura České Republiky · Ministerstvo Školství, Mládeže a Tělovýchovy · CEITEC · Ministry of Education, Science and Technological development · Ministarstvo Prosvete, Nauke i Tehnološkog Razvoja

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