石墨化温度对炭纤维微观结构及其力学性能的影响  

The effect of graphitization temperature on the microstructure and mechanical properties of carbon fibers

作　　者：王浩静[1] 王红飞[1] 李东风[1] 朱星明[1] 贺福[1] 王心葵[1] 

机构地区：[1]中国科学院山西煤炭化学研究所

出　　处：《新型炭材料》2005年第2期157-163,共7页New Carbon Materials

基　　金：国家部委重点基金(614002)~~

摘　　要：以通用型PAN基炭纤维为原材料,通过1800℃～3000℃连续高温石墨化处理,制备了不同性能的炭(石墨)纤维;采用SEM、XRD、RAMAN、元素分析仪、万能材料测试机等分析手段研究了石墨化温度对炭(石墨)纤维微观结构、元素含量、表面形态及其力学性能的影响。实验表明:随着热处理温度的提高,炭纤维中非碳元素(氮、氢)的含量逐渐减少而碳元素质量分数却从92.62%增加到99.99%;纤维的微观结构也从二维乱层石墨结构向有序的三维层状结构发展,表现为石墨晶体层间距d002随处理温度的提升逐渐减小、d100和d110与La和Lc不断增大,纤维抗拉强度呈下降趋势、弹性模量呈上升趋势。The effect of graphitization temperature on the microstructure, elemental composition, surface character and mechanical properties of carbon fibers was studied by means of SEM, XRD, Raman spectroscopy, elemental analysis and mechanical testing. It was found that with an increase of heat treatment temperature ranging from 1800 to 3000, the percent carbon increases from 92.62% to 99.99%, the interlayer spacing d(002) decreases, both d(100) and the d(110) increase, L-a and L-c increase, tensile strength decreases, and Young' s modulus increases.

关 键 词：炭(石墨)纤维 石墨化 微观结构 力学性能 

分 类 号：TQ342.742[化学工程—化纤工业]