We have characterized the structure and luminescence properties for two-component material composed of nanocrystalline cellulose and nanocrystalline (less to 100 nm) silicon powder. An efficient and stable photoluminescence of nanocomposite, resistant to the influence of gas-phase oxidants, has been found. The obtained material has electret-like properties and demonstrates the possibility of mu...

Microwave sintering (MWS) of commercially available 15-nm-size nanocrystalline TiN powder was studied. Densification kinetics and grain growth mechanisms of nano-TiN were evaluated using non-isothermal heating up to 1500 °C with variable heating rates. A true nanocrystalline ceramic with ~80-nm-size grains and 94.5 % theoretical density was obtained via MWS consolidation at 1400 °C. At higher t...

Dendrite-like cobalt selenide nanostructures were synthesized from cobalt and selenium powder precursors by a solvothermal method in anhydrous ethylenediamine. The as-prepared nanocrystalline cobalt selenide was found to possess peroxidase-like activity that could catalyze the reaction of peroxidase substrates in the presence of H2O2. A spectrophotometric method for uric acid (UA) determination...

The work was aimed at the investigation of kinetics Spark Plasma Sintering (SPS) α-Al2O3 particles with amorphous surface layers and effect on grain growth mechanical properties alumina. objects investigations comprised:(i) submicron powder, (ii) powder particles' surfaces, (iii) fine-grained powder. powders (i) were used to analyze sintering kinetics. Powders initial particle sizes shrinkage t...

se of freeze granulated powders is successfully used as an industrially viable alternative to loose powder sintering for transparent polycrystalline lumina (PCA). Freeze granulation with narrow granule size distribution was realized after suspension condition optimization, with very good owability and regular spherical shapes. The key factors are low viscosity slurries linked to the complex int...