Fabrication of dense forsterite–enstatite polycrystals for experimental studies |
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Authors: | R. D. McDonnell C. J. Spiers C. J. Peach |
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Affiliation: | (1) HPT Laboratory, Faculty of Earth Sciences, Utrecht University, PO Box 80021, 3508 TA Utrecht, The Netherlands Tel.: +31-(0)30-2534972; Fax: +31-(0)30-2537725 e-mail: cspiers@geo.uu.nl, NL |
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Abstract: | A practical and reliable method for the preparation of fine-grained forsterite and forsterite–enstatite polycrystals, in the system MgO–SiO2, is described. The method employs state-of-the-art techniques from materials science, namely sol-gel synthesis, powder processing and sintering. The resulting dense polycrystalline materials are homogeneously fine-grained (1–2 μm) and uniformly foam-textured. Moreover, they are highly reproducible in composition and microstructure. The enstatite content can be controlled to within ∼1%, in the range 0–50%, and densities up to 98% of theoretical density can be achieved. The method thus yields polycrystalline forsterite–enstatite material suitable for a range of geochemical, petrological and geophysical studies. Received: 19 October 1999 / Accepted: 18 June 2001 |
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Keywords: | Olivine Pyroxene Sintering Sol-gel Synthesis |
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