Question

Describe sol gel method for preparation of ceramic and their properties

Answer 1

Explanation:

In materials science, the sol–gel process is a method for producing solid materials from small molecules. The method is used for the fabrication of metal oxides, especially the oxides of silicon (Si) and titanium (Ti). The process involves conversion of monomers into a colloidal solution (sol) that acts as the precursor for an integrated network (or gel) of either discrete particles or network polymers. Typical precursors are metal alkoxides.

Answer 2

Answer:

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• ➫ The sol-gel process is a wet-chemical technique extensively used for the synthesis of both glassy and ceramic materials .

The sol-gel coating process consists of following  steps:

• ➫ 1- Formation of sol by disperse of  colloidal particles into in a liquid
• ➫ 2- Coating of sol solution  on the substrate by spraying, dipping or spinning
• ➫ 3- produce a gel via polymerization   of sol through the removal of the stabilizing components  
• ➫ 4- formation of an amorphous or crystalline coating  by heat treatments