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- W1986948595 abstract "Abstract In 1989 a solar furnace plant was erected at Paul Scherrer Institute (PSI). It mainly consists of a 52 m 2 heliostat and a parabolic dish of 2.7 m in diameter. In order to test the performance and to get operational experience, some introductory experiments were carried out. The maximum attainable temperature in the focal region was determined by melting oxides of known melting points. Temperatures of about 2800°C could be reached. The minimum focal spot diameter is approximately 10 cm at a distance of about 1.82 m from the vertex of the paraboloid. Material tests indicate that tungsten, molybdenum, tantalum and possibly zirconium could be candidates for the construction of critical components of solar reactors. The ceramic materials (alumina, Al 2 O 3 ; silicon carbide, SiC; boron nitride, BN; silicon nitride, Si 3 N 4 ) examined so far are for various reasons restricted to special applications. Graphite shows unexpected attractive properties. Some experiments were performed concerning the production of titanium dioxide, TiO 2 , the dissociation of calcium carbonate, CaCO 3 , the calcination of delta to alpha alumina, the production of aluminum carbide, Al 4 C 3 (starting from alumina and soot) as well as the production of finely dispersed tungsten oxide, WO 3 , and molybdenum oxide, MoO 2 /MoO 3 . Concluding from thermodynamic considerations, temperature reduction effects could have played a role in the above-mentioned melting and calcining experiments. Further progress is necessary to establish reliable methods to measure the temperature and the flux density. Furthermore, process engineering and chemical analyses of products will be of increasing importance." @default.
- W1986948595 created "2016-06-24" @default.
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- W1986948595 date "1991-12-01" @default.
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- W1986948595 title "Some physical and chemical experiments under concentrated solar radiation and some thermodynamic considerations" @default.
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- W1986948595 doi "https://doi.org/10.1016/0165-1633(91)90087-2" @default.
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