Synthesis of fine dispersed titanium diboride from nanofibrous carbon |
| |
| Affiliation: | 1. Novosibirsk State Technical University, pr. K. Marksa 20, Novosibirsk 630073, Russia;2. Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, pr. Akademica Lavrent`eva 3, Novosibirsk 630090, Russia;3. Novosibirsk State University, ul. Pirogova, Novosibirsk 630090, Russia;4. Novosibirsk State University of Architekture and Civil Engineering, ul. Leningradskaya 113, Novosibirsk 630008, Russia;5. Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, pr. Akademica Lavrent`eva 5, Novosibirsk 630090, Russia;1. State Key Laboratory of Advanced Special Steel, College of Materials Science and Engineering, Shanghai University, Shanghai 200072, PR China;2. Metal Research Institute, Chinese Academy of Sciences, Shenyang 110015, PR China;1. Department of Materials Engineering, College of Chemistry and Materials Engineering, Shiraz Branch, Islamic Azad University, Shiraz, Iran,;2. School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, Iran;1. Key Laboratory of Automobile Materials (Ministry of Education), School of Materials Science and Engineering, Jilin University, No. 5988 Renmin Street, Changchun 130022, China;2. Department of Physics and Shenzhen Institute for Quantum Science & Engineering, Southern University of Science and Technology, Shenzhen 518055, China;3. Herbert Gleiter Institute of Nanoscience, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China |
| |
| Abstract: | This paper presents the experimental data on the synthesis of titanium diboride (TiB2) fine dispersed powder carried out in laboratory scale. TiB2 powder was prepared by the reduction of titanium dioxide with boron carbide and nanofibrous carbon in an argon atmosphere. The powders of TiB2 were characterized by X-ray diffraction (XRD), elemental analyses, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), low-temperature nitrogen adsorption, particle size analysis, simultaneous thermogravimetry and differential scanning calorimetry (TG-DSC). The resulting material contains a single phase – titanium diboride. The particles of the powder were predominantly aggregated. The average size of the particles and the aggregates were 7.4–8.0 µm with a wide size of distribution. The specific surface values of samples obtained were 2.4–5.8 m2/g. The oxidation of titanium diboride began from the temperature of 450 °C. In this work, the optimal synthesis conditions were estimated: the molar ratio was TiO2:B4C:C=2:1:3 (according to stoichiometry), the temperature was 1600 °C, the process duration was 20–30 min. |
| |
| Keywords: | Powders Chemical preparation Spectroscopy Borides Chemical properties Carbon nanofibers |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
