Double layer SiO2/Al2O3 high emissivity coatings on stainless steel substrates using simple spray deposition system
IR@NAL: CSIR-National Aerospace Laboratories, Bangalore
View Archive Info| Field | Value | |
| Title |
Double layer SiO2/Al2O3 high emissivity coatings on stainless steel substrates using simple spray deposition system
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| Creator |
Mahadik, DB
Gujjar, S Gouda, GM Barshilia, Harish C |
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| Subject |
Aeronautics (General)
Chemistry and Materials (General) |
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| Description |
High emissivity coatings are widely used in spacecraft and industrial furnaces, which have attracted a great attention recently due to energy saving applications. In this study, a
simple spray coating method was used to produce double layer high emissivity coatings on stainless steel (SS) substrate by sol-gel process at room temperature. Initially silica (SiO2) sol, prepared using sol-gel process, was deposited on sandblasted SS substrate with required
thickness, followed by deposition of aluminium oxide (Al2O3) layer. The gradual increase in the thickness of Al2O3 layer resulted in increase in the emittance. The optimized double layer Al2O3 (23 μm)/SiO2 (9.13 μm) coating on SS substrate exhibited high emittance (ε = 0.92-
0.94) and low absorptance (α = 0.30-0.34). The high emissivity coating, when exposed to a temperature of 1000 ºC in air, showed nearly the same value of emissivity. The SiO2/Al2O3 coating thus provides a simple and cost effective method for the preparation of high emissivity coatings.
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| Publisher |
Elsevier Publisher
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| Date |
2014-04
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| Type |
Journal Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://nal-ir.nal.res.in/12177/1/ja509.pdf
Mahadik, DB and Gujjar, S and Gouda, GM and Barshilia, Harish C (2014) Double layer SiO2/Al2O3 high emissivity coatings on stainless steel substrates using simple spray deposition system. Applied Surface Science, 299 . pp. 6-11. ISSN 0042-207X |
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| Relation |
http://dx.doi.org/10.1016/j.apsusc.2014.01.159
http://nal-ir.nal.res.in/12177/ |
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