Nanosized pure and Cr doped Al{sub 2−x}Sc{sub x}(WO{sub 4}){sub 3} solid solutions
- Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Building 11, 1113 Sofia (Bulgaria)
Highlights: ► Nanosized pure and Cr-doped Al{sub 2−x}Sc{sub x}(WO{sub 4}){sub 3} obtained for a first time. ► Material for ceramics with different application. ► Co-precipitation method for preparation. ► X-ray, DTA, TEM investigations. ► Co-precipitation method gives 10–70 nm particles. -- Abstract: Nanosized solid solutions of the formula Al{sub 2−x−y}Sc{sub x}Cr{sub y}(WO{sub 4}){sub 3}, where x varies from 0 to 2 and y from 0.02 to 0.1 are synthesized for the first time by the co-precipitation method. X-ray powder diffraction, DTA/TG and TEM analyses demonstrate that the powders are pure solid solution compounds with orthorhombic structure, space group Pnca. Particle sizes between 10 and 70 nm are obtained after thermal treatment of the precipitates at 550 °C for 1 h for all compositions except in the case of Sc{sub 1.9}Cr{sub 0.1}(WO{sub 4}){sub 3}. For the last one mean particle size of 64 nm was obtained after thermal treatment at 500 °C. The influence of the concentrations of Sc and Cr as well as of the temperature and duration of the thermal treatment on the particle size and size distribution are established and discussed.
- OSTI ID:
- 22215124
- Journal Information:
- Materials Research Bulletin, Vol. 47, Issue 6; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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