Volume 2, Issue 1 (2-2017)                   jste 2017, 2(1): 20-24 | Back to browse issues page

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khani esfand abad N, Oloomi S, Mirjalili S. The Effect of Metallic and Non-metalic Nano-coatings and Polarization of Incident Radiation on Radiation Properties of Nono-coatings. jste. 2017; 2 (1) :20-24
URL: http://yujs.yu.ac.ir/jste/article-1-36-en.html
, Yazd Science and Research Branch, Islamic Azad University , neda.khani1987@yahoo.com
Abstract:   (2935 Views)

The study aimed at investigating radiation properties of multi-layers constructions including underneath layer of silicon, slightly covered by non-metal coating of silicon nitrate and silicon dioxide, and metal coating of gold, silver and cooper in temperature of 25 degrees Celsius and polarized incident radiation. Ray Transfer Matrix model was used to calculate radiation properties of multi-layers constructions as well as experimental expressions of optical constants of slightly covered silicon. The transmission coefficient of metallic coatings in polarization types of P and S and non-polarized status was zero due to low penetration power and high radiation coefficient. In non-metallic coatings, on the other hand, the transmission coefficient increased contributing to the larger penetration depth of electromagnetic waves. The overall results indicated that polarization coefficient of transmission of type P was significantly larger than Type S in non-metallic coatings. Radiation coefficient of metallic coatings was significantly larger in comparison to non-metallic coatings. As the result, they can be used in industries requiring high radiation. The results indicated that in underneath silicon layers, in room temperature and wave length of.4 to.84 micrometer, the absorption and consequently radiation coefficients were insignificant. However, silver coating indicated significantly higher absorption and radiation. In addition, the fluctuation in polarization of the incident ray of P and S type resulted in an increase in emissivity and transmission factors. The findings showed that silver in comparison to gold and cooper revealed significantly higher radiation coefficient. In radiation angle of zero (normal), radiation properties were equal for both types of S and P.

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Type of Study: Research | Subject: Special
Received: 2014/08/12 | Accepted: 2015/04/11 | Published: 2017/01/30

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