膨胀石墨制备及其1.064μm激光消光性能（英文）
发布时间：2018-08-26 17:52
【摘要】：基于两步氧化插层先驱体法制备了不同膨胀体积的膨胀石墨,分析了先驱体、膨胀石墨的微观结构和微观形貌;利用静态测试系统测试了膨胀石墨对1.064μm激光的消光行为,据此计算了其对1.064μm激光的质量消光系数,得到了该系数与膨胀体积的依赖关系,并从消光机理进行了原因分析。结果表明:通过控制和优化先驱体合成条件,可以制得膨胀体积高达600mL·g-1的膨胀石墨;两步插层导致先驱体的层间距(d002)明显大于天然石墨,当其d002从0.359 0nm增至0.371 1nm时,所得膨胀石墨的膨胀体积从267mL·g-1增至600mL·g-1;膨胀石墨平均质量消光系数与膨胀体积呈近似线性关系,当膨胀体积由233mL·g-1增至600mL·g-1时,该系数从0.20m2·g-1升至0.48m2·g-1;膨胀石墨对1.064μm激光呈非选择性散射,膨胀体积大,导致几何面积大,对1.064μm激光的散射能力增强;同时,膨胀石墨中出现了更深的孔隙或孔腔,可作为等效黑体增强对入射激光的吸收.
[Abstract]:Based on the two-step oxidation intercalation precursor method, the expanded graphite with different expansion volumes was prepared. The microstructure and morphology of the expanded graphite were analyzed, and the extinction behavior of the expanded graphite to 1.064 渭 m laser was measured by static test system. Based on this, the mass extinction coefficient of 1.064 渭 m laser is calculated, and the dependence of the coefficient on the expansion volume is obtained, and the reason is analyzed from the extinction mechanism. The results show that the expanded graphite with expansion volume up to 600mL g-1 can be obtained by controlling and optimizing the synthetic conditions of the precursor, and the intercalation of two steps leads to a larger interlayer spacing (d002) of the precursor than that of the natural graphite, when its D002 increases from 0.359 0nm to 0.371 1nm. The swelling volume of expanded graphite increased from 267mL g -1 to 600mL g -1, and the average mass extinction coefficient of expanded graphite was approximately linear with the expansion volume. When the expansion volume increased from 233mL g -1 to 600mL g -1, the expansion volume increased from 0.20m2 g -1 to 0.48m2 g 1, and the expanded graphite exhibited nonselective scattering of 1.064 渭 m laser. The larger the expansion volume, the larger the geometric area, and the stronger the scattering ability to 1.064 渭 m laser. At the same time, a deeper pore or cavity appears in the expanded graphite, which can be used as the equivalent black body to enhance the absorption of the incident laser.
【作者单位】： 脉冲功率激光技术国家重点实验室电子工程学院;安徽省红外与低温等离子体重点实验室;北京遥感研究所;
【基金】：The State Key Laboratory of Pulsed Power Laser Technology(No.SKL20132R03)
【分类号】：TN24
本文编号：2205696
[Abstract]:Based on the two-step oxidation intercalation precursor method, the expanded graphite with different expansion volumes was prepared. The microstructure and morphology of the expanded graphite were analyzed, and the extinction behavior of the expanded graphite to 1.064 渭 m laser was measured by static test system. Based on this, the mass extinction coefficient of 1.064 渭 m laser is calculated, and the dependence of the coefficient on the expansion volume is obtained, and the reason is analyzed from the extinction mechanism. The results show that the expanded graphite with expansion volume up to 600mL g-1 can be obtained by controlling and optimizing the synthetic conditions of the precursor, and the intercalation of two steps leads to a larger interlayer spacing (d002) of the precursor than that of the natural graphite, when its D002 increases from 0.359 0nm to 0.371 1nm. The swelling volume of expanded graphite increased from 267mL g -1 to 600mL g -1, and the average mass extinction coefficient of expanded graphite was approximately linear with the expansion volume. When the expansion volume increased from 233mL g -1 to 600mL g -1, the expansion volume increased from 0.20m2 g -1 to 0.48m2 g 1, and the expanded graphite exhibited nonselective scattering of 1.064 渭 m laser. The larger the expansion volume, the larger the geometric area, and the stronger the scattering ability to 1.064 渭 m laser. At the same time, a deeper pore or cavity appears in the expanded graphite, which can be used as the equivalent black body to enhance the absorption of the incident laser.
【作者单位】： 脉冲功率激光技术国家重点实验室电子工程学院;安徽省红外与低温等离子体重点实验室;北京遥感研究所;
【基金】：The State Key Laboratory of Pulsed Power Laser Technology(No.SKL20132R03)
【分类号】：TN24
【相似文献】
相关期刊论文 前1条
1 关华,潘功配,姜力;膨胀石墨对3mm、8mm波衰减性能研究[J];红外与毫米波学报;2004年01期
，本文编号：2205696
本文链接：https://www.wllwen.com/kejilunwen/dianzigongchenglunwen/2205696.html
