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Influence of mechanochemical activation on sintering of cordierite ceramics with the presence of Bi2O3 as a functional additive

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2011
625.pdf (167.1Kb)
Authors
Đorđević, Nataša
Obradović, Nina
Filipović, Suzana
Kosanović, Darko
Mitrić, Miodrag
Marković, Smilja
Pavlović, Vladimir B.
Conference object (Published version)
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Abstract
According to its exceptional electrical characteristics, such as low temperature expansion coefficient, low dielectric constant and good mechanical properties, cordierite, 2MgO⋅2Al2O3⋅5SiO2, represents very attractive ceramic material in the field of high temperatures. In order to accelerate the process of sintering, 1 mass% Bi2O3 has been added to starting mixtures. Liquid phase sintering caused by presence of bismuth-oxide leads to lowering temperature of cordierite formation. Mechanical activation of starting mixtures (0-56 minutes in vibro-mill) additionally leads to lowering sintering temperatures. Process of sintering was performed at 1200, 1300 and 1400 oC, for 2h. BET and PSA were employed in order to follow the changes in specific surface area and particle size of mechanically treated powders. Phase composition of starting powders and sintered materials was analyzed by X-ray diffraction method. Moreover, SEM analysis was used for analysis of powders morphology and sintered pal...lets microstructure.

Keywords:
mechanical activation / cordierite / X-ray / SEM / sintering
Source:
VII International Conference on Mechanochemistry and Mechanical Alloying INCOME 2011: Programme and the Book of Abstracts, 2011, 84-84
Publisher:
  • Belgrade : Materials Research Society of Serbia
Projects:
  • Directed synthesis, structure and properties of multifunctional materials (RS-172057)
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URI
http://dais.sanu.ac.rs/123456789/628
Collections
  • ITN SANU - Opšta kolekcija / ITS SASA - General collection
Institution
Институт техничких наука САНУ / Institute of Technical Sciences SASA

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