Effect of HCl on the PPO assisted sol-gel synthesis of olivine-type Co2SiO4 ultrafine particles
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- 作者：Hongtao Cui ; Marcos Zayat and David Levy
- 关键词：Sol ; gel ; Particles ; Mixed oxide ; Epoxide
- 刊名：Journal of Sol-Gel Science and Technology
- 出版年：2006
- 出版时间：October, 2006
- 年：2006
- 卷：40
- 期：1
- 页码：83-87
- 全文大小：344 KB
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Ceramics,Glass,Composites,Natural Materials
Inorganic Chemistry
Optical and Electronic Materials
Nanotechnology - 出版者：Springer Netherlands
- ISSN：1573-4846
文摘
Olivine-type Co2SiO4 ultrafine particles were synthesized by a sol-gel method using propylene oxide as a gelation agent. Owing to the high homogeneity of the intermediate gel precursor, the usage of this epoxide method results in a substantial reduction of calcination temperature and time as compared with the solid-state route, and a great reduction of calcination time as compared with other wet-chemistry routes. This high homogeneity is obtained by the usage of an appropriate amount of HCl, as a catalyst that matches the rate of hydrolysis of TEOS and the metal ions, allowing the formation of Si–O–Co bonds.