SLÁMA Martin Brno University of Technology, CEITEC - Central European Institute of Technology

Study of Preparation and Properties of Ca-phospahates/ZrO2 Biocomposites

Co-authors CIHLÁŘ Jaroslav, DRDLÍK Daniel

Bioceramic composite materials based on Ca-phosphates containing fibres of tetragonal ZrO2 were prepared using method of electrophoretic deposition (EPD). The main objective was the study of influence of dispersion composition on the mechanical, chemical and biological properties of bioceramic composites. Dispersions were composed from 0.85, 1.70, 4.25, 12.75, or 21.25 wt.% of monochloroacetic acid (MCAA), 15 wt.% of ceramic load and isopropanol medium. Dispersions were pre-treated by high-energy milling in planetary ball mill before EPD. Electrophoreticaly deposited Ca-phosphates had a rough surface and contain a large number of cracks. The quality of deposits was improved by addition of 0.05, 0.11, 0.16 or 0.23 g/l of indifferent electrolyte (LiCl) into dispersions. Influence of sintering temperature, the milling time and fiber content of ZrO2 on the structural composition was evaluated by measurement of density and by structural analysis using a scanning electron microscope. Mechanical and bioactive properties of sintered deposits were determined by measuring of Vickers’s hardness, fracture toughness and in vitro test in simulated body fluid (SBF), respectively. ACKNOWLEDGEMENTS: Project COST LD12004 "Study of catalytically active nanoparticles and nanostructures for the synthesis of hydrogen".

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