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Reaction kinetics of mechanically activated cordierite based ceramics studied via DTA

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2015
758.pdf (638.1Kb)
Authors
Obradović, Nina
Đorđević, Nataša
Kosanović, Darko
Filipović, Suzana
Marković, Smilja
Mitrić, Miodrag
Pavlović, Vladimir B.
Conference object (Published version)
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Abstract
Cordierite, 2MgO•2Ah03•5Si02 (MAS), is a very attractive high-temperature ceramic material. In order to accelerate the process of sintering, 5.00 mass% Mo03 was added to the starting mixtures. The mechanical activation of the starting mixtures was performed in a high energy ball mill in time intervals from 0 to 160 minutes. In following, starting mixtures were sintered at 1300 °C for 2h. In order to determine the changes in the particle size distribution, the mechanically treated powders were characterized by a laser light-scattering particle size analyzer. The phase composition of the starting mixtures and sintered samples was analyzed by the X-ray diffraction method. Differential thermal analyses (DTA) and thermo-gravimetric (TG) analysis were used in order to determine characteristic temperatures. Kissinger's equation was employed to calculate apparent activation energies of various processes that occur within the system while heating. Based on the obtained DTA results, it was estab...lished that mechanical activation along with MoO3 additive, has influence on sintering temperature which was decreased for about 150 °C.

Keywords:
cordierite / ceramics / sintering / mechanical activation
Source:
3rd Central and Eastern European Conference on Thermal Analysis and Calorimetry 25-28 August 2015, Ljubljana, Slovenia: Book of Abstracts, 2015, 195-195
Publisher:
  • Ljubljana : Central and Eastern European Committee for Thermal Analysis and Calorimetry
Funding / projects:
  • Directed synthesis, structure and properties of multifunctional materials (RS-172057)
[ Google Scholar ]
Handle
https://hdl.handle.net/21.15107/rcub_dais_761
URI
http://dais.sanu.ac.rs/123456789/761
http://aspace.agrif.bg.ac.rs/handle/123456789/5708
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Institution/Community
Poljoprivredni fakultet

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