Phase Transformations in ZrO2-SiO2 Gels
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ABSTRACTTransparent sols and gels in the ZrO2-SiO2 system containing 25, 50 and 75 mole % ZrO2 were prepared using tetraethyl orthosilicate (TEOS) and Zr n-propoxide solution in the presence of acids. Heating the gels to 600°C yielded an amorphous product which at higher temperature crystallized with formation of tetragonal and monoclinic ZrO2 . Zircon crystallized slowly at 1600°C. The results are explained by metastable liquid-liquid phase separation in the studied system.
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1992 ◽
Vol 146
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pp. 1-25
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2014 ◽
Vol 86
(2)
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pp. 191-202
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2018 ◽
Vol 18
(4)
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pp. 2628-2635
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