【摘要】：基于兩步氧化插層先驅(qū)體法制備了不同膨脹體積的膨脹石墨,分析了先驅(qū)體、膨脹石墨的微觀結(jié)構(gòu)和微觀形貌;利用靜態(tài)測(cè)試系統(tǒng)測(cè)試了膨脹石墨對(duì)1.064μm激光的消光行為,據(jù)此計(jì)算了其對(duì)1.064μm激光的質(zhì)量消光系數(shù),得到了該系數(shù)與膨脹體積的依賴關(guān)系,并從消光機(jī)理進(jìn)行了原因分析。結(jié)果表明:通過(guò)控制和優(yōu)化先驅(qū)體合成條件,可以制得膨脹體積高達(dá)600mL·g-1的膨脹石墨;兩步插層導(dǎo)致先驅(qū)體的層間距(d002)明顯大于天然石墨,當(dāng)其d002從0.359 0nm增至0.371 1nm時(shí),所得膨脹石墨的膨脹體積從267mL·g-1增至600mL·g-1;膨脹石墨平均質(zhì)量消光系數(shù)與膨脹體積呈近似線性關(guān)系,當(dāng)膨脹體積由233mL·g-1增至600mL·g-1時(shí),該系數(shù)從0.20m2·g-1升至0.48m2·g-1;膨脹石墨對(duì)1.064μm激光呈非選擇性散射,膨脹體積大,導(dǎo)致幾何面積大,對(duì)1.064μm激光的散射能力增強(qiáng);同時(shí),膨脹石墨中出現(xiàn)了更深的孔隙或孔腔,可作為等效黑體增強(qiáng)對(duì)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.
【作者單位】： 脈沖功率激光技術(shù)國(guó)家重點(diǎn)實(shí)驗(yàn)室電子工程學(xué)院;安徽省紅外與低溫等離子體重點(diǎn)實(shí)驗(yàn)室;北京遙感研究所;
【基金】：The State Key Laboratory of Pulsed Power Laser Technology(No.SKL20132R03)
【分類號(hào)】：TN24

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