Optical characteristics of particles produced using electroerosion dispersion of titanium in hydrogen peroxide
| Autor: | S. A. Pyachin, N. F. Karpovich, K. S. Makarevich, A. V. Zaitsev, A. A. Burkov, M. A. Ermakov |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Anatase Aqueous solution Materials science Physics and Astronomy (miscellaneous) Band gap Annealing (metallurgy) Oxide Analytical chemistry chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Titanium oxide chemistry.chemical_compound chemistry Rutile 0103 physical sciences 0210 nano-technology Titanium |
| Zdroj: | Technical Physics. 61:1046-1052 |
| ISSN: | 1090-6525 1063-7842 |
| DOI: | 10.1134/s1063784216070215 |
| Popis: | Titanium oxide particles are produced using electric-discharge dispersion of titanium in aqueous solution of hydrogen peroxide. Electron vacuum microscopy, X-ray diffraction, and diffuse reflection spectroscopy are used to study the morphology, composition, and optical characteristics of the erosion particles. It has been demonstrated that the particles consist of titanium and titanium oxides with different valences. The edge of the optical absorption is located in the UV spectral range. The band gap is 3.35 eV for indirect transitions and 3.87 eV for direct allowed transitions. The band gap decreases due to the relatively long heating in air at a temperature of 480–550°C, so that powder oxide compositions can be obtained, the optical characteristics of which are similar to optical characteristics of anatase. The erosion products are completely oxidized to rutile after annealing in air at a temperature of 1000°C. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|