Growth and some properties of Sc2AlB6 crystal obtained from the solution in aluminum melt |
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| Authors: | Shigeru Okada,Kunio Kudou,Toetsu Shishido,Torsten Lundströ m |
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| Affiliation: | a Faculty of Engineering, Kokushikan University, 4-28-1 Setagaya, Setagaya, Tokyo 154-8515, Japanb Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa, Yokohama 221-8686, Japanc National Institute for Research in Inorganic Materials, Tsukuba, Ibaraki 305-0044, Japand Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba, Sendai 980-0812, Japane A.F. Ioffe Physical-Technical Institute of the Russian Academy of Sciences, St. Petersburg 194021, Russiaf The Ångström Laboratory, Inorganic Chemistry, Uppsala University, Box 538, SE-751 21 Uppsala, Sweden |
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| Abstract: | Crystals of Sc2AlB6 were grown using scandium oxide and elemental boron as starting materials in a self-component aluminum solution under an argon atmosphere. The growth conditions for obtaining single crystals of relatively large size were investigated. Sc2AlB6 single crystals were obtained in the form of prisms extending in the b-axis direction. The largest Sc2AlB6 crystals prepared had maximum dimensions of about 0.4×0.4×4.2 mm3. The values of the Vickers microhardness and the electrical resistivity of Sc2AlB6 crystals are 12.7±0.8 GPa and 43±8 μΩ cm, respectively. The oxidation of Sc2AlB6 crystals starts at about 773°C, and the weight gain after TG determination is 12.9 mass% at 1200°C. The oxidation products of Sc2AlB6 crystals could not determined. |
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| Keywords: | Sc2AlB6 Solution in aluminum melt Vickers microhardness Electrical resistivity Oxidation resistance |
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