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Sr(2+)-Mg(2+)-doped SiAION ceramics

Sr(2+)-Mg(2+)-dotierte SiAION-Keramiken
: Kurama, S.; Cigdemir, G.; Mandal, H.; Herrmann, M.


Journal of the American Ceramic Society 89 (2006), No.2, pp.714-716
ISSN: 0002-7820
ISSN: 1551-2916
Journal Article
Fraunhofer IKTS ()
SiAlON; Alpha-Phase; Beta-Phase; Magnesiumion; Strontiumion; Dotierung=Fremdatomzusatz; Ionenradius; Gasdrucksintern; Phasenzusammensetzung; Röntgenbeugung; Rietveld-Analyse; Rasterelektronenmikroskopie

In the present work, multi-cation-doped (Sr(2+)-Mg(2+)) SiAlON ceramics were investigated. MgO and SrO were used in 100:0 and 50:50 molar ratios. The mixture was sintered at 1800 and 1830 deg C for 1 h in a gas pressure-sintering furnace. The results showed that sintered samples were composed of mainly alpha- and betal-SiAlON phases and small amounts of some Sr-containing phases and SiAlON polytypes. According to Rietveld analysis of X-ray diffraction patterns, Mg is incorporated into the alpha-SiAlON structure. However, the incorporation of Sr is limited.