Effects of mechanical activation and two-step sintering on the structure and electrical properties of cordierite-based ceramics. Issue 12 (September 2016)

• Record Type: Journal Article
• Authors: Obradović, Nina; Filipović, Suzana; Đorđević, Nataša; Kosanović, Darko; Marković, Smilja; Pavlović, Vladimir; Olćan, Dragan; Djordjević, Antonije; Kachlik, Martin; Maca, Karel
• Is Part Of: Ceramics international. Volume 42:Issue 12(2016)
• Page Start: 13909
• Page End: 13918
• Publication Date: 2016-09
• Subjects: A. Milling -- C. Dielectric properties -- D. Cordierite -- Sintering; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2016.05.201
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: 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-Al2 O3 -SiO2 system have been analyzed. The mixtures of MgO-Al2 O3 -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 (εr ) and loss tangent (tan δ) as a function of the time of mechanical treatment.