Crystallization Kinetics of Iron Rich Glass-Ceramic Obtained from Waste of Steel Industry

André Luís Luza; Débora Cristina Niero Fabris; Edivelton Soratto Gislon; Morgana de Medeiros Machado; Oscar Rubem Klegues Montedo

doi:10.4028/www.scientific.net/MSF.775-776.244

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HomeMaterials Science ForumMaterials Science Forum Vols. 775-776Crystallization Kinetics of Iron Rich...

Crystallization Kinetics of Iron Rich Glass-Ceramic Obtained from Waste of Steel Industry

Abstract:

The main objective of this work was to study the crystallization kinetics of glass-ceramic obtained from steel waste. Two compositions were melted at about 1350 °C. The obtained frits were dried and re-melted. Each composition was then wet ground, dried, and chemically characterized (X-ray fluorescence and atomic absorption spectrometry), structurally (X-ray diffraction), and thermally (thermal differential analysis). Then the powders were compacted and the samples were dried and heat treated in a kiln between 690 and 890 °C. After, the crystallized bodies were ground and the crystalline phases were identified by X-ray diffraction. Results showed that the main formed crystalline phases were magnetite, hematite, Fe_2.95Si_0.05O₄, and CaAl₂Fe₄O₁₀. The activation energies obtained by the Kissinger method were between 348 and 423 kJ.mol^-1, whereas the Avrami parameter was obtained between 0.76 and 1.1 indicating surface crystallization.

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Materials Science Forum (Volumes 775-776)

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244-249

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.775-776.244

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Online since:

January 2014

Authors:

André Luís Luza, Débora Cristina Niero Fabris, Edivelton Soratto Gislon, Morgana de Medeiros Machado, Oscar Rubem Klegues Montedo

Keywords:

Ceramic, Crystallization, Glass-Ceramics, Kinetic, Steel Waste

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