A new solution route to silicates. Part 3: Aqueous sol-gel synthesis of willemite and potassium antimony silicate

Willemite, α-Zn 2SiO 4, and KSbOSiO 4 (KSS) were prepared by an aqueous sol-gel process, starting from a H 2Si 2O 5 solution as silicon source. Willemite was obtained free from impurities, in a teflon-lined bomb at 473 K under autogenous pressure. In the case of KSS, the same procedure results in a...

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Bibliographic Details
Published in:Materials research bulletin 1996-09, Vol.31 (9), p.1133-1139
Main Authors: Reynaud, L., Brouca-Cabarrecq, C., Mosset, A., Ahamdane, H.
Format: Article
Language:English
Subjects:
A. ceramics
B. sol-gel chemistry
C. X-ray diffraction
Chemistry
Colloidal gels. Colloidal sols
Colloidal state and disperse state
D. optical properties
Exact sciences and technology
General and physical chemistry
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Summary:Willemite, α-Zn 2SiO 4, and KSbOSiO 4 (KSS) were prepared by an aqueous sol-gel process, starting from a H 2Si 2O 5 solution as silicon source. Willemite was obtained free from impurities, in a teflon-lined bomb at 473 K under autogenous pressure. In the case of KSS, the same procedure results in a clear solution which gives, by evaporation at room temperature, an amorphous gel. Orthorhombic KSS crystallizes from this gel at 1273 K.
ISSN:0025-5408
1873-4227
DOI:10.1016/0025-5408(96)00097-9