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Vol 11, Issue 1, 2016
Pages: 219 - 224
Research article
Nonmetallic materials
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Published: 21.04.2016. Research article Nonmetallic materials

INFLUENCE OF MICRONIZED GRINDING FILLER ON THE RHEOLOGICAL PROPERTIES OF COATINGS BASED ON CORDIERITE

By
Marko Pavlović ,
Marko Pavlović
Contact Marko Pavlović

Faculty of Technology and Metallurgy, University of Belgrade , Belgrade , Serbia

Marina Dojčinović ,
Marina Dojčinović

Faculty of Technology and Metallurgy, University of Belgrade , Belgrade , Serbia

Tatjana Volkov-Husović
Tatjana Volkov-Husović

Faculty of Technology and Metallurgy, University of Belgrade , Belgrade , Serbia

Abstract

For the development of refractory coatings with controlled rheological properties the influence of 
micronized milling process was investigated. Change the properties of fillers based on cordierite, 
primarily on changing the size and shape of grain fillers, dispersion and stability of the suspension of 
the coating was investigated, also. Cordierite was obtained by synthesis in the solid state from the 
weight of the assembled components: kaolin, alumina, talc. For the characterization of cordierite 
these methods were applied: X-ray diffraction, differential thermal analysis, SEM and optical 
microscopy. Micronized grinding of filler was done in a vibro mill in time (min): 15, 30, 60. 
Optimization of composition and improvement of utility properties of the coating was achieved by a 
choice of sizes and form factors grain activated filler, using different components of coatings, as well 
as changing the process of developing coatings. The resulting coatings showed sizable sedimentation 
stability (precipitated matter content of less than 4 % at 24 h), satisfactory fire resistance and 
permeability to gases, easy application and adhesion to the surface of the sand mold, easy to adjust 
the thickness of the coating layers, no bubbles, no cracking and abrasion the dried coating layers.

References

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Y. A, M. R, A. AB, A. C, R AH. Bahlulib Y.: Microstrukture, permeability and rheological behavior of lost foam refractory coatings. Surface&Coating Technology. 2008;202:4636-4643,.
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Foundry Means – Materials for mould and core dressing – Classification.
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Standard S. SRPS EN 12890:2000/CEN/TC 190, Founding – Patterns, Pattern Equipment and Core Boxes for the Production of Sand Moulds and Sand Cores.
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Moore R. E.: Refractories, Structure and Properties, Encyclopedia of Materials: Science and Technology. 2001;

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