Effects of mechanical activation and two-step sintering on the structure and electrical properties of cordierite-based ceramics
| Autor: | Darko Kosanović, Nataša Đorđević, Antonije R. Djordjevic, Smilja Marković, Suzana Filipović, Martin Kachlik, Nina Obradović, Dragan I. Olcan, Karel Maca, Vladimir B. Pavlović |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Sintering Mineralogy Cordierite 02 engineering and technology Dielectric engineering.material 01 natural sciences 0103 physical sciences Materials Chemistry Electrical measurements Ceramic Composite material Ball mill Milling 010302 applied physics Process Chemistry and Technology 021001 nanoscience & nanotechnology Microstructure Surfaces Coatings and Films Electronic Optical and Magnetic Materials Dielectric properties visual_art Ceramics and Composites engineering visual_art.visual_art_medium Dissipation factor 0210 nano-technology |
| Zdroj: | Ceramics International |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2016.05.201 |
| Popis: | The mechanical activation can help reduce production costs and modify cordierite-based materials. In this study, the structure and electrical properties of the 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 time periods ranging from 0 to 160 min. Structural investigations were performed on the obtained powders. The effects of activation and a two-step sintering process on the microstructure and crystal structure were investigated by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The thermal stability was analyzed using DTA. Electrical measurements showed variations of the dielectric constant (epsilon(r)) and loss tangent (tan delta) as a function of the time of mechanical treatment. |
| Databáze: | OpenAIRE |
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