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Crystallization of Zircon in Stoneware Glazes
Author(s) -
Castilone Robert J.,
Sriram Dattaguru,
Carty William M.,
Snyder Robert L.
Publication year - 1999
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1999.tb02162.x
Subject(s) - zircon , glaze , cubic zirconia , recrystallization (geology) , crystallization , mineralogy , materials science , geochemistry , geology , chemical engineering , metallurgy , petrology , ceramic , engineering
High levels of zircon are required to impart opacity in glazes. Zircon additions of <3 wt% dissolve into the glassy phase; additions of >12% cause all the zircon to crystallize from the glaze. Dynamic high‐temperature X‐ray diffraction has shown that, during heating, a portion of the zircon dissolves and subsequently recrystallizes, using undissolved zircon crystals as seeds. This recrystallization does not occur at lesser zircon levels, because of a lack of seed crystals. When zirconia is added to the glaze, zircon is formed as elongated crystals at the glaze surface. Lesser zircon levels have been observed in the glazes that have zirconia additions.