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Sol stabilization in sol-gel process

Ghamsari, M. S ; Sharif University of Technology | 2011

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  1. Type of Document: Article
  2. Publisher: Nova Science Publishers, Inc , 2011
  3. Abstract:
  4. The sol-gel process as a chemical route is widely used in the fields of materials science and engineering. Historically, the sol-gel techniques have been developed during the past 40 years as an alternative process for glasses and ceramics production [1]. It is reported that the sol-gel process had been introduced by Ebelman [2], who had prepared a transparent SiO2 thin film from slow hydrolysis of an ester of silicic acid in 1845. In comparison with other techniques such as CVD or sintering, the sol-gel technique is a very simple process with considerable advantages. This process is low cost, has high controllability and potential application for preparation of different materials and devices. These specifications of the solgel process caused it to be employed as a unique method for preparation of metallic, ceramic, hybrid, composite, fiber, and glass substances with different size and morphology with a wide range of applications. During several decades, different forms of the sol-gel process have been introduced by researchers. These methods are different in some aspects of sol-gel principles. But, the preparation of sol or gel as an intermediate stage of the process is common in all of them. In figure (1), the different kind of sol-gel processes are shown. The hydrolysis and condensation of metal alkoxide can be completely considered as a fully sol-gel process. In such a method, which is used primarily for the fabrication of materials (typically a metal oxide), the process is started by preparation of a chemical solution which acts as the precursor for an integrated network (or gel) of either discrete particles or network polymers
  5. Keywords:
  7. Source: The Sol-Gel Process: Uniformity, Polymers and Applications ; 2011 , Pages 787-818 ; 9781617613210 (ISBN)
  8. URL: https://www.novapublishers.com/catalog/product_info.php?products_id=27377