球磨-退火法合成氮化硼纳米管及其表征  

Synthesis and Characterization of Boron Nitride Nanotubes by Ball milling and Annealing Process

作　　者：朱雁风[1] 汪宙 刘海洋[1] 王维[1] 刘伟[1] 

机构地区：[1]河南科技大学材料学院

出　　处：《中国粉体工业》2017年第6期12-17,共6页China Powder Industry

摘　　要：氮化硼纳米管（BNNTs）以其耐高温、抗氧化、抗化学腐蚀、热传导性好、韧性好、稳定的电学性质等优良性能,在纳米复合材料、高温绝缘材料、电子材料等应用领域中前景广阔。氮化硼纳米管的强度和韧性都远远优于任何纤维材料,但高产量、高纯度的合成还有很大困难。同时,人们对氮化硼纳米管的生长机理还不是很清楚,这严重阻碍了氮化硼纳米管的发展。因此有必要对氮化硼纳米管的制备及其性能进行研究。本文以B粉、NH_3为主要原料,以Fe_2O_3为催化剂,采用球磨-退火法制备了氮化硼纳米管。实验的最优配方为1g B粉,0.5g Fe_2O_3,球磨8h,烧成温度1000℃,保温2h,可以得到转化率高达88.5%的氮化硼纳米管。使用粉末衍射仪、扫描电镜、透射电镜等检测方法对制备的氮化硼纳米管进行了充分表征。BNNTs owned potential broad prospects of application in the field of Nano-composites, high temperature resistant insulating materials and electronic materials because of the excellent properties, such as high temperature resistance, antioxidation, corrosion resistance, high heat conduction, good toughness, stable electrical properties, etc. The strength and toughness of BNNTs were superior to any fiber materials. But its widely using was still limited by the difficult for preparing BNNTs of the high purity and conversion. Still, the growth mechanism of BNNTs confused people. Thus, it is necessary to investigate the preparation and properties of BNNTs. In this investigation, BNNTs were prepared by ball milling and annealing process with B and NH3 as raw materials, FeEO3 as catalyst. The conversion rate as high as 88.5% of boron nitride nanotubes can be get by lg B powders, 0.5g Fe2O3 , milling 8h, sintering temperature of 1000 ℃ for 2h. The as-prepared BNNTs were characterized by the XRD, SEM and TEM.

关 键 词：BNNTs 制备 转化率 

分 类 号：TQ127.1[化学工程—无机化工]