课题组制备了具有柔顺、阻燃、耐火特性碳化硅纳米纤维纸

发布时间:2016/03/11 22:01:30 浏览 人次

Flexible paper-like semiconductornanowire materialsare expectedto meetthe criteriaforsome emer-
ging applications,such as components of
exible solarcells,electricalbatteries,supercapacitors,nano-
composites, bendable or wearable electronic or optoelectronic components,and so on. As a new
generation of wide-bandgap semiconductors and reinforcementsin composites,SiC nanowires have
advantagesin powerelectronic applicationsand nano
berreinforced ceramic composites.Herein,free-
standing SiC nanowire paper consisting of ultralong single-crystalline SiC nanowires was prepared
through afacile vacuum
ltration approach.The ultralong SiC nanowires were synthesized by a sol gel
and carbothermalreduction method.The
exible papercomposed ofSiC nanowiresis 100 nm in width
and upto severalhundreds of micrometersinlength.The nanowiresareintertwisted with each otherto
form athree-dimensionalnetwork-like structure.SiC nanowire paperexhibits high
exibility and strong
mechanicalstability.The refractory performance and thermalstability ofSiC nanowire paper were also
investigated.The papernotonly exhibitsexcellentnon
ammabilityin re,butalsoremains wellpreserved
withoutvisible damage whenitis heatedin an electric oven ata hightemperature(1000°C)for3 h. With
its high
exibility,excellent non ammability,and high thermalstability,the free-standing SiC nanowire
paper may havethe potentialtoimprovethe ablationresistance ofhightemperature ceramic composites.

   

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