Search Results (25)
Migration of critical radionuclides in the area of former uranium mine Žirovski vrh
A study of the migration of critical radionuclide in the area of the former uranium mine of Žirovski vrh in Slovenia was performed. Critical natural radionuclides are defined as the long-lived natural radionuclides from the uranium-radium decay chain, which are 238U, 234U, 230Th, 226Ra, 210Pb and 210Po. In the area …
Structural and electrical properties of 0.65PMN-0.35PT thick films on different substrates
A starting powder with the nominal composition 0.65Pb(Mg1/3Nb2/3)O3–0.35PbTiO3 (0.65PMN–0.35PT), which corresponds to the morphotropic phase boundary (MPB) composition, was prepared by mechanochemical activation followed by attritor milling and low-temperature calcination at 700°C. It had a narrow particle size distribution with the median particle size equal to 0.3 μm. From the …
The hydrolysis of AlN powder and its use for the synthesys of nanostructured alumina coatings
he thesis describes a study of aluminum nitride (AlN) powder hydrolysis in the temperature range between 5 °C and 90 °C. The analysis of the temperature dependence of the course of the hydrolysis and the reaction kinetics, along with a mechanistic model set up for the hydrolysis reactions, gives a …
Hydrogen absorption in Ti-Zr-Ni alloys
Our research focused on the formation of Ti40Zr40-xNi20Cux (x=3, 5), Ti45Zr38-xNi17Cux (x=3, 5), Ti53Zr27-xNi20Cux (x=3, 5) and Ti58Zr24-xNi18Cux (x=3, 5) icosahedral (i-phase) quasicrystals by three different techniques and their subsequent characterization and high-pressure hydrogenation. The quasicrystals of this system are thermodynamically stable and they have a relatively good affinity for …
Solution synthesis of nanoparticles in multicomponent oxide systems
The study of PbZrO3 (PZ), PbTiO3 (PT) and La2Zr2O7 (LZ) prepared by alkoxide sol-gel synthesis is described. PZ and PT sols were prepared from lead acetate, zirconium and titanium n-butoxide, in n-butanol and hydrolysed with Rw (molar ratio of water per lead acetate) between 2 and 15 in neutral medium …