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Publikācija: Phase Formation and Structure of Mullite-Alumina-Zirconia and Spinel- Enstatite Ceramics Developed from Synthetic and Mineral Raw Materials

Publication Type Full-text conference paper published in other conference proceedings
Funding for basic activity Unknown
Defending: ,
Publication language English (en)
Title in original language Phase Formation and Structure of Mullite-Alumina-Zirconia and Spinel- Enstatite Ceramics Developed from Synthetic and Mineral Raw Materials
Field of research 2. Engineering and technology
Sub-field of research 2.5 Materials engineering
Authors Andris Actins
Aleksejs Hmeļovs
Gaida Maruta Sedmale
Uldis-Jānis Sedmalis
Ingunda Šperberga
Keywords Mullite-corundum-ZrO2, spinel–enstatite/forsterite ceramics, phases composition,
Abstract New dense and porous ceramics are developed using two formulation approaches. These are ceramics with remarkable content of mullite, corundum and ZrO2 - tetragonal and monoclinic in crystalline phase and porous (average size of pores up to 150-350μm) spinel-enstatite/forsterite ceramics. To promote the phase development by high-temperature synthesis of these ceramics the mineral raw materials – illite clay and illite clay together with dolomite are used. Bulk density for mullite (corundum) – zirconia ceramics is increased by equal addition of illite clay (8.2 wt.%) as well as ZrO2 and especially ZrO2 +Y2O3 to starting mullite mixtures. Contrary the addition of different kind and amount of illite clay together with dolomite trends to formation of spinel – enstatite (forsterite) ceramics and decrease the bulk density to the value up to 0.35 g/cm3. The XRD results indicate that ZrO2 monoclinic/tetragonal incorporation in mullite (corundum) structure realizes through the liquid phase. Development of the spinel MgAl2O4 and enstatite MgSiO3 crystalline phases along with the sufficient amount of glassy phase in microstructure and even distributed pores are proper for spinel-enstatite (forsterite) ceramic samples.
DOI: 10.4028/www.scientific.net/MSF.575-578.953
Hyperlink: http://www.scientific.net/MSF.575-578.953 
Reference Actins, A., Hmeļovs, A., Sedmale, G., Sedmalis, U., Šperberga, I. Phase Formation and Structure of Mullite-Alumina-Zirconia and Spinel- Enstatite Ceramics Developed from Synthetic and Mineral Raw Materials. In: Physical and Numerical Simulation of Materials Processing: Selected, Peer Reviewed Papers from the 5th International Conference on Physical and Numerical Simulation of Materials Processing (ICPNS ’07), China, Zhengzhou, 23-27 October, 2007. Ütikon-Zürich : Trans Tech Publications, 2008, pp.953-958. ISBN 9780878493920. ISSN 1662-9752. Available from: doi:10.4028/www.scientific.net/MSF.575-578.953
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