本文選題：碳納米管場發(fā)射 + 絲網(wǎng)印刷�。� 參考：《浙江大學》2015年碩士論文

【摘要】：碳納米管作為一種準一維的管狀結(jié)構(gòu)材料,具有較大的C-C鍵能,較高的長徑比和大的比表面積,這些賦予了它優(yōu)異的機械強度,良好的導熱性、導電性,穩(wěn)定的化學性質(zhì)以及不錯的場發(fā)射特性等。從而使得碳納米管在儲氫、超級電容、復合材料、鋰電池以及生物醫(yī)學工程等領域有著極其廣泛的應用。首先,本文在基礎實驗部分介紹了陰陽極各種漿料的配制,陰陽極板詳細的刻蝕、印刷過程,利用絲印技術(shù)印刷制作陰極碳納米管和陽極熒光粉薄膜,以及它們的燒結(jié)過程和處理方法,最后介紹FED器件的簡單組裝及測試過程。但是這樣制作的陰陽極板還不能滿足后續(xù)的封裝實驗要求,因此本文還對場發(fā)射陰極進行了一些優(yōu)化,通過各種改進及處理,將其工作電壓降低至200-250V之間,并提升其電流密度,從而改善其場發(fā)射發(fā)光的均勻性和亮度。其次,本文利用化學氧化還原的方法制備出了性能優(yōu)良的石墨烯,并將其復合到三種碳納米管中,并測試添加石墨烯后對它們場發(fā)射特性的影響。實驗發(fā)現(xiàn)石墨烯的復合可以提升碳納米管陰極薄膜的場發(fā)射效果；在三種碳納米管中,DWCNTs的效果最好,開啟電場低至0.6V/gm左右,閾值電場低至1.2V/gm左右,電流密度可達到16mA/cm2以上,其次是短而細的I型MWCNTs,電流密度可達到4-8mA/cm2,效果最差的是長而粗的II型MWCNTs,電流密度值一般在2mA/cm2以下。最后,本實驗對優(yōu)化后的陰極和陽極進行真空封裝,制作工藝包括利用點膠機對極板進行低熔點玻璃粉點膠,陰陽極的組裝和封結(jié),FED器件的真空排氣封裝等。同時簡單介紹了與FED相關(guān)驅(qū)動電路的工作原理,并將其焊接在FED顯示模塊的電極上面,最后對組裝好的FED模塊成功進行了點亮測試。
[Abstract]:As a kind of quasi-one-dimensional tubular structure material, carbon nanotubes have large C-C bond energy, high aspect ratio and large specific surface area, which give them excellent mechanical strength, good thermal conductivity and electrical conductivity. Stable chemical properties and good field emission properties. Carbon nanotubes are widely used in hydrogen storage, super capacitor, composite materials, lithium batteries and biomedical engineering. First of all, in the basic experiment part, this paper introduces the preparation of various kinds of paste of cathode and anode, the detailed etching and printing process of anode and cathode plate, and the production of cathode carbon nanotube and anodic phosphor film by screen printing technology. The sintering process and processing method are also introduced. Finally, the simple assembly and testing process of FED devices are introduced. However, the cathode plate made in this way can not meet the requirements of subsequent packaging experiments. Therefore, the field emission cathode is optimized in this paper. Through various improvements and treatments, the working voltage is reduced to 200-250 V, and the current density is increased. Thus, the uniformity and brightness of the field emission luminescence are improved. Secondly, graphene with excellent properties was prepared by chemical redox method, and was synthesized into three kinds of carbon nanotubes. The effect of graphene addition on their field emission characteristics was tested. It is found that the composite of graphene can enhance the field emission effect of carbon nanotube cathode film, and the effect of 0.6V/gm is the best among the three kinds of carbon nanotubes, the threshold electric field is lower than 0.6V/gm, the threshold electric field is lower than 1.2V/gm, and the current density is higher than 16mA/cm2. The second is the short and fine type I MWCNTs.The current density can reach 4-8 Ma / cm ~ 2. The worst effect is the long and coarse type II MWCNTs. The current density is generally below 2mA/cm2. Finally, the optimized cathode and anode are packaged in vacuum. The fabrication process includes low melting point glass powder dispenser, cathode and cathode assembly and vacuum exhaust packaging of fed device. At the same time, the working principle of the driver circuit related to FED is briefly introduced, and it is welded to the electrode of the FED display module. Finally, the assembled FED module is successfully illuminated and tested.
【學位授予單位】：浙江大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TQ127.11;TB383.1

【參考文獻】

相關(guān)期刊論文 前1條

1 馬仁志,魏秉慶,徐才錄,梁吉,吳德海;基于碳納米管的超級電容器[J];中國科學E輯:技術(shù)科學;2000年02期

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