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    • 1. 发明申请
    • METHOD OF SYNTHESIZING SMALL-DIAMETER CARBON NANOTUBES WITH ELECTRON FIELD EMISSION PROPERTIES
    • 合成小直径碳纳米管与电子场发射特性的方法
    • WO2005065218A3
    • 2007-04-19
    • PCT/US2004042704
    • 2004-12-21
    • XINTEK INCUNIV DUKELIU JIEDU CHUNSHENGQIAN CHENGGAO BOQIU QIZHOU OTTO Z
    • LIU JIEDU CHUNSHENGQIAN CHENGGAO BOQIU QIZHOU OTTO Z
    • H01J1/62H01J1/304H01J9/02H01J63/04
    • H01J9/025B82Y10/00B82Y30/00B82Y40/00C01B32/162C01B2202/04C01B2202/36H01J1/304H01J2201/30469
    • Carbon nanotube material having an outer diameter less than 10 nm and a number of walls less than ten are disclosed. Also disclosed are an electron field emission device including a substrate, an optionally layer of adhesion-promoting layer, and a layer of electron field emission material. The electron field emission material includes a carbon nanotube having a number of concentric graphene shells per tube of from two to ten, an outer diameter from 2 to 8 nm, and a nanotube length greater than 0.1 microns. One method to fabricate carbon nanotubes includes the steps of (a) producing a catalyst containing Fe and Mo supported on MgO powder, (b) using a mixture of hydrogen and carbon containing gas as precursors, and (c) heating the catalyst to a temperature above 950 °C to produce a carbon nanotube. Another method of fabricating an electron field emission cathode includes the steps of (a) synthesizing electron field emission materials containing carbon nanotubes with a number of concentric graphene shells per tube from two to ten, an outer diameter of from 2 to 8 nm, and a length greater than 0.1 microns; (b) dispersing the electron field emission material in a suitable solvent; (c) depositing the electron field emission materials onto a substrate; and (d) annealing the substrate.
    • 公开了外径小于10nm,壁数小于10的碳纳米管材料。 还公开了一种电子场发射器件,其包括衬底,任选层的粘附促进层和电子场发射材料层。 电子场发射材料包括碳纳米管,每个管具有多至2个至10个,外径为2至8nm的多个同心石墨烯壳,纳米管长度大于0.1微米。 一种制造碳纳米管的方法包括以下步骤:(a)制备负载在MgO粉末上的含有Fe和Mo的催化剂,(b)使用氢气和含碳气体的混合物作为前体,和(c)将催化剂加热至 高于950℃以产生碳纳米管。 制造电子场发射阴极的另一种方法包括以下步骤:(a)合成含有碳纳米管的电子场发射材料,每个管具有多个同心的石墨烯,每个管数为2至10个,外径为2至8nm,以及 长度大于0.1微米; (b)将电子场发射材料分散在合适的溶剂中; (c)将电子场发射材料沉积到衬底上; 和(d)使基板退火。