National Repository of Grey Literature 214 records found  beginprevious211 - 214  jump to record: Search took 0.00 seconds. 
The use of large area plastics component for catchwork building, Part III. Results of the numerical simulations
Plešek, Jiří
Results of numerical simulations of static and dynamic response of the front composite panels of trolleybuses and buses Skoda 21 Ab/Tr.
Measurement of elastic constants of orthotropic C-C composite plates by resonant frequency method
Černý, Martin ; Glogar, Petr
A method was developed for determination of elastic constants of textile composite materials based on measurement of resonant frequencies of longitudinal and transversal vibrations of Timoshenko's beam.
Preparation and properties of MgO-Ni(Fe) nanocrystalline composite
Schneeweiss, Oldřich ; Pizúrová, Naděžda ; Jirásková, Yvonna ; Žák, Tomáš ; Bezdička, Petr ; Večerníková, Eva
We have prepared MgO-Ni(Fe) nanocrystalline composites by controlled heat treatment of compacted spark synthesized nanocrystalline powders. Besides particle sizes and their chemical compositions, influence of interaction with surrounding atmosphere and adsorbed gases on phase composition and magnetic properties were investigated. Mössbauer spectroscopy, x-ray diffraction and TEM were used for phase analysis. Thermomagnetic curves and DTA/TG measurements were applied for detection of changes in structure and phase composition during heat treatments. The simultaneous gas analysis using mass spectroscopy by heating yielded information on adsorbed and dissolved gases and their reactions with the nanoparticles.
Příprava a vlastnosti nanokrystalů alpha-Fe and Fe3O4 v matricích MgO a TiO2
Schneeweiss, Oldřich ; Zbořil, R. ; Pizúrová, Naděžda ; Mašláň, M. ; Qiao, Yuanyuan
Preparation of the nanocrystalline composites of iron and magnetite nanoparticles embedded in MgO or TiO2 matrices is described. The results of phase analysis obtained by means of Mössbauer spectroscopy, X-ray diffraction, TEM and magnetic measurements are reported. Coercive force of the samples of the composite formed by spherical Fe3O4 (mean size -20 nm) nanoparticles was 25±1 mT and for alpha-Fe (-30nm) it was 30±1 mT. These values were not influenced by the chemical difference of the matrix materials.

National Repository of Grey Literature : 214 records found   beginprevious211 - 214  jump to record:
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