Synthesis of Highly Dispersed Zirconium Diboride for Fabrication of Special-Purpose Ceramic |
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| Authors: | Yu L Krutskii E A Maksimovskii M V Popov O V Netskina T M Krutskaya N Yu Cherkasova T S Kvashina E A Drobyaz |
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| Institution: | 1.Novosibirsk State Technical University,Novosibirsk,Russia;2.Institute of Inorganic Chemistry, Siberian Branch,Russian Academy of Sciences,Novosibirsk,Russia;3.Novosibirsk State University,Novosibirsk,Russia;4.Novosibirsk State Architectural-Constructional University,Novosibirsk,Russia;5.Boreskov Institute of Catalysis, Siberian Branch,Russian Academy of Sciences,Novosibirsk,Russia |
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| Abstract: | Reduction of zirconium dioxide with boron carbide and nanofibrous carbon in argon yielded a highly dispersed powder of zirconium diboride. Characteristics of zirconium diboride powders were examined by various analytical methods. The material obtained is represented by a single phase, zirconium diboride. Powder particles are for the most part aggregated. The average size of particles and aggregates is 10.9–12.9 μm with a wide size distribution. The specific surface area of the samples is 1.8–3.6 m2 g–1. The oxidation of zirconium diboride begins at a temperature of 640°C The optimal synthesis parameters were determined: ZrO2: B4C: C molar ratio of 2: 1: 3 (in accordance with stoichiometry), process temperature 1600–1700°C, synthesis duration 20 min. |
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