prof. RNDr. Jaroslav Cihlář, CSc.
E-mail:   cihlar@fme.vutbr.cz  Dept.:   Institute of Materials Science and Engineering Dept. of Ceramics and Polymers Position:   Professor Room:   A4/106

Supervised courses:

• Colloids (DS204A)
• Colloids (DS204)
• Nanostructured Materials (TMT)
• Surfaces and catalysis (DS204)
• Surfaces and Catalysis (DS204A)

Publications:

• ČÁSTKOVÁ, K.; HADRABA, H.; MATOUŠEK, A.; ROUPCOVÁ, P.; CHLUP, Z.; NOVOTNÁ, L.; CIHLÁŘ, J.:
  Synthesis of Ca,Y-zirconia/hydroxyapatite nanoparticles and composites
  journal article in Web of Science
• ČÁSTKOVÁ, K.; MATOUŠEK, A.; BARTONÍČKOVÁ, E.; CIHLÁŘ, J.; VANÝSEK, P.; CIHLÁŘ, J.:
  Sintering of Ce, Sm, and Pr Oxide Nanorods, The American Chemical Society
  journal article in Web of Science
• ČÁSTKOVÁ, K.; MACA, K.; CIHLÁŘ, J.; HUGHES, H.; MATOUŠEK, A.; TOFEL, P.; BAI, Y.; BUTTON, T.:
  Chemical Synthesis, Sintering and Piezoelectric Properties of Ba0.85Ca0.15 Zr0.1Ti0.9O3 Lead-Free Ceramics
  journal article in Web of Science
• CIHLÁŘ, J.; KAŠPÁREK, V.; KRÁLOVÁ, M.; ČÁSTKOVÁ, K.:
  Biphasic anatase-brookite nanoparticles prepared by sol-gel complex synthesis and their photocatalytic activity in hydrogen production, Elsevier Ltd.
  journal article in Web of Science
• DRDLÍK, D.; BARTONÍČKOVÁ, E.; HADRABA, H.; CIHLÁŘ, J.:
  Influence of anionic stabilization of alumina particles in 2-propanol medium on the electrophoretic deposition and mechanical properties of deposits
  journal article in Web of Science
• CIHLÁŘ, J.; DRDLÍK, D.; CIHLÁŘOVÁ, Z.; HADRABA, H.:
  Effect of acids and bases on electrophoretic deposition of alumina and zirconia particles in 2-propanol
  journal article in Web of Science
• CIHLÁŘ, J. Jr.; BARTONÍČKOVÁ, E.; CIHLÁŘ, J.:
  Low-temperature sol-gel synthesis of anatase nanoparticles modified by Au, Pd and Pt and activity of TiO2/Au, Pd, Pt photocatalysts in water splitting, Springer Science+Business Media New York 2013
  journal article in Web of Science

List of publications at Portal BUT

Abstracts of most important papers:

• MATOUŠEK, A.; KUKLETOVÁ, M.; CIHLÁŘ, J.:
  Influence of Nanograin Size ZrO2 and Al2O3 Ceramics on Biological Response of Cells,
  Key Engineering Materials (print), Vol.587, (2013), No.25, pp.132-137, ISSN 1013-9826, Trans Tech Publications Ltd
  journal article - other
  The influence of the grain size of alumina and zirconia ceramics on the spreading and adhesion of MG63 cell lines was investigated. Single-component ceramics and layered composite ceramics were prepared by electrophoretic deposition, uniaxial pressing and sintering. The grain size of zirconia was 100 nm to 2.7 mikro m and that of alumina was 0.5 mikro m to 1.5 mikro m. Subsequently, sample surfaces were polished and thermally etched. Biological tests of adhesion (0.5 to 8 h) were used to evaluate the influence of grain size on biological response. The highest cell spreading was obtained for ZrO2 ceramics with an average grain size of 100 and 120 nm. The cell selection was observed on layered ZrO2/Al2O3 composites. The cells predominantly adhered to ZrO2 layers. The results showed a positive influence of nanostructured ceramic surfaces on biological behaviour of MG63 cells
• HADRABA, H.; DRDLÍK, D.; CHLUP, Z.; MACA, K.; DLOUHÝ, I.; CIHLÁŘ, J.:
  Layered ceramic composites via control of electrophoretic deposition kinetics,
  Journal of the European Ceramic Society, Vol.33, (2013), No.12, pp.2305-2312, ISSN 0955-2219
  journal article - other
  The article summarises optimisation of electrophoretic deposition of alumina and zirconia from concentrated isopropanolic suspensions stabilised by monochloracetic acid. Method for in situ monitoring of deposited mass was developed and experimentally checked. Prediction of electrophoretic deposition kinetics was based on the voltage drop measurement and electrophoretic mobility estimation from experimental kinetics data. It was shown that voltage change during electrophoretic deposition did not affect relative density of the deposited layers in the laminates prepared. For this purpose a method of the relative density measurement using the microscopic measurement of relative shrinkage of individual layers was developed. Accuracy of the method was confirmed by comparison with shrinkage measurement using high temperature dilatometry. Adopting obtained results the alumina/zirconia laminate with precise control of layers thicknesses and final densities was prepared
• CIHLÁŘ, J.; DRDLÍK, D.; CIHLÁŘOVÁ, Z.; HADRABA, H.:
  Effect of acids and bases on electrophoretic deposition of alumina and zirconia particles in 2-propanol
  journal article in Web of Science
  The effects of acids (monochloroacetic, dichloracetic, trichloroacetic and sulfuric acids) and bases (diethanolamine, triethanolamine, piperidine) on electrophoretic mobility and electrophoretic deposition (EPD) of particles of amphoteric Al2O3 and ZrO2 in anhydrous 2-propanol were studied. It was found that the zeta-potential of Al2O3 and ZrO2 particles had in acidic and alkaline 2-propanol media opposite charge to that in aqueous medium. This phenomenon was explained by the low dissociation constants of acids and bases in 2-propanol. This enables electrosteric stabilization of Al2O3 and ZrO2 particles by acid anions and base cations. Similar electrophoretic behaviour of Al2O3 and ZrO2 particles in 2-propanolic dispersions stabilized by MCAA allowed the preparation of compact, regular layered laminates with high cohesion at the interface of layers.
• CIHLÁŘ, J. Jr.; BARTONÍČKOVÁ, E.; CIHLÁŘ, J.:
  Low-temperature sol-gel synthesis of anatase nanoparticles modified by Au, Pd and Pt and activity of TiO2/Au, Pd, Pt photocatalysts in water splitting, Springer Science+Business Media New York 2013
  journal article in Web of Science
  Base catalyzed hydrolysis and condensation of Ti isopropoxide with water at ambient temperature and molar ratio H2O/Ti(i-PrOH)(4) varied from 1 to 100 was studied. It was found that molar ratio H2O/Ti(i-PrOH)(4) = 100 originated amorphous TiO2-precursor of summary composition TiO1.9(OH)(0.2) with a specific surface area of 354 m(2)/g. Low-temperature crystallization of amorphous TiO2-precursor to nanostructured anatase at 80 A degrees C in a slightly reducing environment of d-glucose was studied. It was found that the low-temperature nucleation and crystallization of anatase was initiated (activated) by combined effects of d-glucose and Au-0, Pd-0 and Pt-0 nanoparticles, generated in situ by slow reduction of Au3+, Pd2+ and Pt4+ ions using d-glucose. Considerable photocatalytic activity of Ti-hydroxide-oxide/Au, Pd, Pt catalysts prepared at low-temperature was associated with high content of nanostructured anatase and low content of Au, Pd and Pt nanoparticles (0.02 wt.%) effectively deposited on the surface of titania particles. The maximum hydrogen evolution rates 3.4 mu mol/min g at Ti-hydroxide-oxide/Au, 4.0 mu mol/min g at Ti-hydroxide-oxide/Pd and 4.1 mu mol/min g at Ti-hydroxide-oxide/Pt were found. The activity of all TiO2/Au, Pd and Pt catalysts increased by calcination at 600 A degrees C from 50 to 100%
• HADRABA, H.; DRDLÍK, D.; CHLUP, Z.; MACA, K.; DLOUHÝ, I.; CIHLÁŘ, J.:
  Laminated alumina/zirconia ceramic composites prepared by electrophoretic deposition,
  Journal of the European Ceramic Society, Vol.32, (2012), No.9, pp.2053-2056, ISSN 0955-2219
  journal article - other
  The electrophoretic deposition of alumina and zirconia powders from isopropanolic suspension in the presence of monochloroacetic acid was studied in the constant-current regime. The different levels of electric current during deposition from 250 microA to 48 mA were used. The green density of the deposit depends on the current density and then on the particle velocity during deposition, reaching values from 58% to 61% according to the electric current used. It was found that the lower the green density of the green deposit, the larger the pores. The low green density led to low final fired density and subsequently to the low Vickers hardness HV5 ranging from 2000 to 1650 depending on electric current used. Based on these findings microlaminates having various thickness ratios to achieve different residual stress levels were prepared consisting of alternating layers of alumina and zirconia.