KClO_4/Zr在石英管内的燃烧发射光谱与燃烧产物分析

An Analysis of Combustion Emission Spectrum and Combustion Products of KClO_4/Zr in the Quartz Tubes

为了研究燃烧条件对KClO4/Zr烟火剂燃烧过程中光辐射性能的影响,考察了 KClO4/Zr在开放环境和不同规格封闭石英管内的燃烧发射光谱和燃烧产物。借助光纤光谱仪、光电二极管和示波器测试了烟火剂燃烧过程中的光辐射能量分布和闪光时间-强度曲线,分析了所得发射光谱在（590±10）,（750±10）和（808±10）nm三个主吸收波段内的光谱效率,借助 SEM表征了不同燃烧条件下 KClO4/Zr 燃烧产物的形貌。结果表明：在开放条件下燃烧时,KClO4/Zr的燃烧发射光谱在可见光到近红外的宽波段内,最强辐射出现在730-820 nm波段。在石英管内封闭燃烧时,随着石英管体积的减少,在石英管外检测到的燃烧发射光谱强度逐渐减弱,光谱能量分布也呈现不同的变化规律,而且对火焰发射光谱分布进行处理后,随着石英管体积的变化,得到（590±10）,（750±10）和（808±10）nm波段的光谱效率也呈现不同的变化规律。但是,随着石英管体积的减少,KClO4/Zr烟火剂的爆燃闪光辐射时间逐渐缩短,峰值辐射强度逐渐提高。增加石英管的直径,有利于在管外获得更高的有效光辐射能量,减少石英管的直径,则有利于提高烟火剂的峰值辐射强度。随着管直径的增大,KClO4燃烧更加充分,产物粒径较小,呈规则的球状。而管长度的改变对反应并无太大影响。

Aiming at understanding the light radiation properties of KClO4/Zr combusting under different conditions,emission spectrum and combustion products for KClO4/Zr combusting in open air and closed quartz tubes were studied respectively.Ener-gy distribution of the light radiation signal and the emission intensity evolution with time were measured with fiber optic spec-trometer,and photo-diode and oscilloscope.Spectral efficiency within （590±10）,（750±10）and （808±10）nm were analyzed respectively according to the obtained flame emission spectrum.Morphology of the combustion products of KClO4/Zr were ob-served with scanning electronic microscopy （SEM）.Results showed that the flame emission spectrum of KClO4/Zr distributed within the visible and near infrared width wave band,whiel the strongest radiation appeared within 730 nm to 820 nm band. When burning in closed quartz tubes,detected combustion emission spectrum intensity decreased significantly with the decrease in size of the tube.Also,the energy distribution of the emission spectrum showed different variation trends,and to deal with flame emission spectrum distribution,as the change of volume of quartz tubes,（590±10）,（750±10）and （808±10）nm bands’spectral efficiency are also present different change rules.Generally,increasing the diameter of the quarts tube favored the increase of the effective light radiation energy detected outside of the tube,and decreasing the diameter of the quartz tubes fa-vored the peak emission intensity of KClO4/Zr.With the increase of tube diameter,KClO4 burning more fully,the product par-ticle size is smaller;the morphology is the rule of the globular.And the change of tube length is not too large effect in the reac-tion results.