Use of Magnesium Diboride as a “Green‿Fuel for Green Illuminants

详细信息    查看全文

• 作者：Jason S. Brusnahan ; Jay C. Poret ; Jared D. Moretti ; Anthony P. Shaw ; Rajendra K. Sadangi
• 刊名：ACS Sustainable Chemistry & Engineering
• 出版年：2016
• 出版时间：March 7, 2016
• 年：2016
• 卷：4
• 期：3
• 页码：1827-1833
• 全文大小：272K
• ISSN：2168-0485

文摘

We report here on the use of magnesium diboride (MgB₂) as a barium-free alternative for the pyrotechnic generation of green light. Formulations employing KNO₃ as the oxidizer, MgB₂ as the fuel, and various binders and additives were investigated. Upon combustion, the compositions were found to generate the photochemically active BO₂ radical, which emits green light. Fixing the MgB₂ content at 21 wt % gave the closest dominant wavelength (561.4 nm) to that desired for green illuminants and a spectral purity of 33%. The addition of burning rate modifiers to this system was found to inhibit the formation of the BO₂ radical. Exchanging the KNO₃ oxidizer for NH₄ClO₄ increased the spectral purity to 45%. Correlations between the results of thermodynamic modeling and the experimental data are also reported.