Ceramics-Silikáty 55, (4) 355 - 361 (2011) |
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FRACTURE ENERGY OF SELECTED BRITTLE SILICATES
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Jandačka Petr 1, Šancer Jindřich 2, Vojtková Hana 3,
Besta PEtr 4,
Brázda Robert 5,
Količová Petra 3,
Šimková Lucie 3
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1 Nanotechnology Centre and Institute of Physics, VŠB-Technical University of Ostrava
17. listopadu 15, 70833 Ostrava, Czech Republic
2 ICT, VŠB-Technical University of Ostrava
3 Institute of Environmental Engineering, VŠB-Technical University of Ostrava
4 Department of Economics and Management in Metallurgy, VŠB-Technical University of Ostrava
5 Institute of Transport, Technical University of Ostrava
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Keywords: Fracture energy, Surface energy, Specific surface, Powder
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In this research, the specific fracture energy of almandine, zircon and periclase (MgO) are presented. The materials measured
were in powder form during the measurement. A method of crushing the materials using a hydraulic press was used, followed
by statistical analysis of the change in the surface of the powder. Values were taken from particle size measurements performed
by a laser analyzer for the specific surface area calculation. Additionally, the surface energy was calculated for periclase
based on these measured values in order to evaluate whether the measurement was valid in comparison to the measured
values specified by other authors. The dependency of specific fracture energy on crushing speed and environment in which
the powder was crushed (air or water) was also analyzed. |
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