Chem¬ical composition of melilite formed during the firing of carbonate-rich and iron-containing ceramic bodies (Articolo in rivista)

Type
Label
  • Chem¬ical composition of melilite formed during the firing of carbonate-rich and iron-containing ceramic bodies (Articolo in rivista) (literal)
Anno
  • 1999-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1111/j.1551-2916.1999.tb20088.x (literal)
Alternative label
  • Dondi M., Ercolani G., Fabbri B., Marsigli M. (1999)
    Chem¬ical composition of melilite formed during the firing of carbonate-rich and iron-containing ceramic bodies
    in Journal of the American Ceramic Society
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Dondi M., Ercolani G., Fabbri B., Marsigli M. (literal)
Pagina inizio
  • 465 (literal)
Pagina fine
  • 468 (literal)
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  • 82 (literal)
Rivista
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  • 4 (literal)
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  • 2 (literal)
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  • CNR ISTEC (literal)
Titolo
  • Chem¬ical composition of melilite formed during the firing of carbonate-rich and iron-containing ceramic bodies (literal)
Abstract
  • During the firing of carbonate-bearing clay bodies, melilite is frequently formed in the form of very small crystals (1-5 ?m or less in size). In the literature, this phase is generally called gehlenite; however, no precise composition is available. To achieve a chemical characterization of this ''ceramic'' melilite, six industrial products have been analyzed via in situ techniques (scanning electron microscopy coupled with energy-dispersive spectroscopy) and via X-ray fluorescence and X-ray diffractometry (bulk sample). Melilite crystals exhibit the following concentration ranges: 29%-41% SiO2, 32%-42% CaO, 10%-19% Al2O3, 2%-7% MgO, and 4%-10% Fe2O3. The Na2O, K2O, and TiO2 contents are almost always <1%, and FeO is always practically absent in the bulk sample. Overall, ''ceramic'' melilite seems to be actually a solid solution with the following composition range, in terms of end members: 32%-56% gehlenite, 20%-49% åkermanite, plus a significant fraction of ferri-gehlenite (14%-37%). (literal)
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