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Sharif university develops crack-free ceramic coating

May 24, 2014

Iranian researchers from Sharif University of Technology, in association with researchers from Laser and Optic Research Center, produced crack-free ceramic coating using nanotechnology.

The coating is nanostructured and can be produced through a simple and cost-effective method. Results of the research have applications in various industries, including electronics, optics and photonics, Iran Nanotechnology Initiative Council said.

The coating is very thin and nanostructured and it has a thickness of about 30 nm. Due to the lack of crack in its surface, the performance of the coating in optical passing or the capacity of multilayered capacitors made of the coating has increased significantly.

In addition, an increase in the lifetime of the coating and reduction in production costs are among other advantages of the lack of crack in the coating. The presented method has the potential of being introduced as a general approach for the production of ultrathin, nanostructured and crack-free coatings.

The research showed a controlled step should be carried out before the drying to produce crack-free coatings. In this stage, the coating is first placed in a closed environment at the equilibrium vapor pressure so its volatile compounds can exit gradually.

This way, no crack is formed on the coating surface. Next, the coating is dried and cooked.

The modifying method proposed in this research can be easily commercialized since it is executable only by adding a step to previous technologies.

Among the advantages of the sol-gel method used in this research, mention can be made of low temperature of the production process, homogeneity at atomic scale, simple control over the desirable products and the lack of pollution and impurity in the products.

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Source: Iran Daily

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