Synthesis of ZrB2 nanofibers by carbothermal reduction via electrospinning
Synthesis of ZrB2 nanofibers by carbothermal reduction via electrospinning
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DOI：
10.1016/j.cej.2013.08.100
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发表时间：
2013-12
影响因子：
15.1
通讯作者：
Fei Li;Zhuang Kang;Xiao Huang;Guo‐Jun Zhang
中科院分区：
文献类型：
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作者：
Fei Li;Zhuang Kang;Xiao Huang;Guo‐Jun Zhang
采用静电纺丝技术，通过碳热还原法制备了近化学计量比的ZrB 2纳米纤维。以聚锆氧烷（PZO）、硼酸和聚丙烯腈（PAN）分别作为氧化锆、硼和碳源。通过在氩气或真空中在1500 °C下热解初生绿色纤维1小时来获得ZrB 2。所得ZrB 2纳米纤维由均匀的纳米单晶组成。产物相当纯，仅含锆、硼和少量氧。在1500 °C真空中形成的纳米纤维中锆和硼的原子百分比分别为33.4%和62.8%，这非常接近ZrB 2的化学计量比。采用XRD、SEM、EDS、TEM和TG-DTA等手段对纳米纤维进行了表征。
Near-stoichiometric ZrB2nanofibers are synthesized via carbothermal reduction using electrospinning technique. Polyzirconoxane (PZO), boric acid and polyacrylonitrile (PAN) are used as zirconia, boron and carbon sources, respectively. ZrB2is obtained by pyrolyzing the as-spun green fibers at 1500 °C for an hour in argon or vacuum. The obtained ZrB2nanofibers are composed of uniformly nano-sized single crystals. The products are rather pure, containing only zirconium, boron and a small amount of oxygen. The atomic percentages of zirconium and boron in the nanofibers formed in vacuum at 1500 °C are 33.4% and 62.8% respectively, which is very close to the stoichiometric ratio of ZrB2. The nanofibers are characterized by XRD, SEM, EDS, TEM and TG–DTA.