Technical Details
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Maximum run temperature of the centrifuge furnace is 1350°C. The maximum rounds per minute are 2000. This is equivalen to a centrifugal force that is 420 times the gravitational force. The sample volume is up to 0.4 ml (i.e., for example a cylindrical shaped sample with a diameter of 6 mm and a length of 13 mm).
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Applications
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The centrifuge furnace can be used for separation of coexisting liquid or molten silicate phases, but also of metallic phases. Silicate melts can be even quenched to glass by turning off power to the heater. Elemental redistribution between the coexisting phases are prevented as separation processes are fast. Separation ('ponding') of silicate liquids in partially molten experimental charges allows precise chemical analyses of first and residual melts even at very low melt fraction. Moreover mechanical separation processes of e.g. iron sulfide liquids in partly molten silicate aggregates can be studied and than applied to plantary core formation processes.
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| Literature |
- Kadik, A.A., Lebedev, E.B., Dorfman, A.M. and Bagdassarov, N.S. (1989) Simulating crystal-magma separation in a centrifuge Geochem. Int., 20 (8), 39-48.
- Bagdassarov, N.S., Dorfman, A.M. and Dingwell, D.B. (1996) Modelling of melt segregation processes by high-temperature centrifuging of partially molten granites - I. Melt extraction by compaction and deformation. Geophys. J. Int., 127, 616-626.
- Bagdassarov, N.S., Dorfman, A.M. and Dingwell, D.B. (1996) Modelling of melt segregation processes by high-temperature centrifuging of partially molten granites - II. Rayleigh-Taylor instability and sedimentation. Geophys. J. Int., 127, 627-634.
- Hoffmann, J.E., Holzheid, A., Köpke, J. and Berndt, J. (2004) Separation silikatischer Phasen mit Hilfe eines Zentrifugenofens: Erste Ergebnisse. Berichte der Deutschen Mineralogischen Gesellschaft 1, 2004 (Supplement to Eur.J.Mineral. / Beiheft zu Eur.J.Mineral., Vol.16), eingereicht.
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