An improved solar selective coating having high thermal stability and a process for the preparation thereof,

Australian Patent (2017) An improved solar selective coating having high thermal stability and a process for the preparation thereof,. AU2012354063.

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Australian Patent 2012354063, dated June 18, 2017.docx

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Abstract

The present invention relates to an improved solar selective coating having high thermal stability and a process for the preparation thereof. More particularly, it relates to a multilayer solar selective coating containing tandem stacks of titanium (Ti)/Chrome interlayer, aluminum titanium nitride (AITiN), aluminum-titanium oxynitride (AITiON) and aluminum-titanium oxide (AITiO) coated on metallic and non-metallic substrates using a four-cathode reactive 0 unbalanced pulsed direct current magnetron sputtering technique. BACKGROUND OF INVENTION AND DESCRIPTION OF PRIOR ART Solar selective coatings are used as absorbers for harnessing solar energy for various applications. One of the essential requirements of solar selective absorbers is their stable 5 structural composition when they operate at high temperatures. Optical properties of these coatings should not degrade with rise in temperature or over a period of use. The main utility of the present invention is for high temperature applications, particularly, in solar steam generators and steam turbines for producing the electricity. 0 In recent years a greater attention has been shown in harnessing alternative sources of energy like solar energy for industrial applications. Generally, concentrating type solar collectors are popularly used in industries for high temperature applications. Solar selective coatings applied to solar absorbers have been proved as an efficient method for harnessing the solar energy on large scale. The sputtering processes are widely being used to deposit solar absorber coatings 5 for high temperature applications as these processes are environmental friendly and also offer to deposit complex compounds with controlled composition and microstructure.

Item Type: Patent
Subjects: RENEWABLE ENERGY > Solar Energy
Depositing User: Dr. Harish C. Barshilia
Date Deposited: 20 Jul 2018 10:42
Last Modified: 20 Jul 2018 10:42
URI: http://nal-ir.nal.res.in/id/eprint/12718

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