Synthesis of ZrB2 nanofibers by carbothermal reduction via electrospinning

被引：25
|
作者：
Li, Fei [1 ,2 ]
Kang, Zhuang [1 ]
Huang, Xiao [1 ]
Zhang, Guo-Jun [1 ]
机构：
[1] Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
[2] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
来源：
CHEMICAL ENGINEERING JOURNAL | 2013年 / 234卷
关键词：
Ultra high temperature ceramics; Zirconium diboride; Electrospinning; Nanofibers; BORO/CARBOTHERMAL REDUCTION; ZIRCONIUM; FIBERS; MICROSTRUCTURE; PRECURSOR; EVOLUTION; ZRO2;
D O I：
10.1016/j.cej.2013.08.100
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Near-stoichiometric ZrB2 nanofibers are synthesized via carbothermal reduction using electrospinning technique. Polyzirconoxane (PZO), boric acid and polyacrylonitrile (PAN) are used as zirconia, boron and carbon sources, respectively. ZrB2 is obtained by pyrolyzing the as-spun green fibers at 1500 C for an hour in argon or vacuum. The obtained ZrB2 nanofibers 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.
引用
收藏
页码：184 / 188
页数：5
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