纳米α-Fe/木陶瓷复合材料的结构表征与性能研究  

Structural characterization and performance research of α-Fe/woodceramic nanocomposites

作　　者：周蔚虹[1] 喻云水[1] 洪宏[1] 贾春华[1] 邹栋英 ZHOU Weihong;YU Yunshui;HONG Hong;JIA Chunhua;ZOU Dongying(College of Material Science and Technology,Central South University of Forestry and Technology,Changsha 410004,Hunan,China)

机构地区：[1]中南林业科技大学材料科学与工程学院,湖南长沙410004

出　　处：《中南林业科技大学学报》2018年第10期117-122,共6页Journal of Central South University of Forestry & Technology

基　　金：湖南省重点研发计划项目(2016NK2144);湖南省教育厅项目(17C1662);中南林业科技大学青年科学研究基金重点项目(QJ2012012A)

摘　　要：在呋喃树脂中加入不同质量百分数的纳米γ-Fe_2O_3,然后与毛竹竹粉混合、压制成型、高温烧结制备出纳米α-Fe/木陶瓷复合材料。分别采用X射线衍射仪(XRD)与扫描电子显微镜(SEM)对纳米α-Fe/木陶瓷复合材料的物相组成与成分分布与进行了表征,并对其抗弯强度与导电性能进行了研究。结果表明:(1)复合材料中存在的主要晶体相有石墨、α-Fe与Fe_3C;(2)纳米α-Fe颗粒多数呈球形分散于木陶瓷基体中,当γ-Fe_2O_3添加量大于15%时,生成的α-Fe粒子发生了比较明显的团聚;(3)纳米α-Fe/木陶瓷复合材料的抗弯强度随烧结温度的提高而增大,随纳米γ-Fe_2O_3添加量的增大先增加后减小,抗弯强度最大值为13.31 MPa;(4)纳米α-Fe/木陶瓷复合材料的导电性随烧结温度的提高而增大,随纳米γ-Fe_2O_3添加量的增大而增强。Bamboo powder and furan resin added byγ-Fe2O3 nanoparticles with different weight percents were mixed and compressed.As-prepared preforms were then sintered in a vacuum furnace to obtainα-Fe/woodceramic nanocomposite.The phase constitution and ingredient distribution of the composite were performed by X-ray diffraction(XRD)and scanning electron microscopy(SEM).The mechanical properties,volume electrical resistivity of the composite were also investigated.The results are as follows:(1)There mainly exist crystal phases of graphite carbon,α-Fe and Fe3C in the composite;(2)theα-Fe particles were spherical and dispersed in the matrix of woodceramic,and theα-Fe particles aggregate as the addition content ofγ-Fe2O3 nanoparticles is above 15%;(3)the bending strength of theα-Fe/woodceramic nanocomposite increases with the improvement of sintering temperature,and increases at first,and then decreases with the increasing of the addition content ofγ-Fe2O3 nanoparticles;the maximum value of bending strength of theα-Fe/woodceramic nanocomposite is 13.31 MPa;(4)the electrical conductivity of theα-Fe/woodceramic nanocomposite increases with the improvement of sintering temperature,and also increases with the increasing of the addition content ofγ-Fe2O3 nanoparticles.

关 键 词：Γ-FE2O3 Α-FE 木陶瓷 力学性能 导电性 

分 类 号：S781.21[农业科学—木材科学与技术] TB332[农业科学—林学]