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Crystallization Behavior of SiO 2 –Al 2 O 3 –ZnO–CaO Glass System at 1123–1273 K
Author(s) -
Chen Minghui,
Zhu Shenglong,
Wang Fuhui
Publication year - 2010
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.1551-2916.2010.03859.x
Subject(s) - titanite , materials science , crystallization , zirconolite , cubic zirconia , solubility , mineralogy , tetragonal crystal system , phase (matter) , analytical chemistry (journal) , chemical engineering , ceramic , metallurgy , chemistry , pyrochlore , quartz , organic chemistry , engineering , chromatography
The crystallization characteristics of a glass, used as the matrix of high‐temperature protective coatings, based on SiO 2 –Al 2 O 3 –ZnO–CaO with the addition of TiO 2 and ZrO 2 at a temperature range of 1123–1273 K have been investigated. At 1273 and 1173 K, tetragonal zirconia doped with Ti and Ca, initially precipitated from the melt. At 1123 K, however, zirconolite instead of zirconia precipitated as the primary phase. The secondary precipitates were zircon and titanite in the glass fired at 1273 K, titanite and willemite at 1173 K, and zirconolite, titanite, and willemite at 1123 K, respectively. It is proposed that the temperature‐dependent solubility of Ca and Ti in ZrO 2 significantly affects the type and volume fraction of crystals precipitated from the glass.