CVD法SiC连续纤维用炭芯的研究 Ⅳ. 大直径中间相沥青氧化纤维高温热处理的化学/物理效应  

STUDY OF CARBON CORE FOR SiC CONTINUED FILAMENT BY CVD Ⅳ. High Temperature Treatment of Large Diameter Mesophase Pitch Filament

作　　者：查庆芳[1] 张玉贞[1] 吴明铂[1] 朱星明[2] 

机构地区：[1]石油大学重质油加工国家重点实验室,山东东营257061 [2]中国科学院山西煤炭化学研究所,山西太原030001

出　　处：《石油学报（石油加工）》2001年第5期49-54,共6页Acta Petrolei Sinica(Petroleum Processing Section)

摘　　要：考察了对大直径中间相沥青炭单丝 (LDMCF)的高温热处理 ,以及LDMCF与大直径中间相沥青纤维在不同氧化条件下的关系。结果表明 ,随着热处理温度和氧化恒温时间的增加 (氧化恒温时间最长达 8h) ,LDMCF的d0 0 2 和电阻率 (ρ)减小 ;LC0 0 2 、取向度、 g因子和力学性能相应提高 ,LDMCF从乱层碳结构逐渐过渡到石墨微晶结构。在相同热处理温度 (HTT)和氧化条件下 ,两种LDMCF具有不同的d0 0 2 、LC0 0 2 、取向度、 g因子、ρ和力学性能 ,其间的差异与常压和加压制备LDMCF的前驱体中间相沥青有关。s: The relationship between heat treatment temperature (HTT) of LDMCF and the oxidative conditions of large diameter mesophase pitch filaments was investigated The results showed that the d 002 ,resistivity ( ρ ) decreased, L C002 ,degree of orientation, g factor and the mechanical properties increased with the increase of HTT and the time of oxidative holding up to 8 h And the texture of LDMCF changed, along with the increase of HTT and oxidative time, from random layered carbon to oriented graphite crystalline structure The d 002 , L C002 ,degree of orientation, g factor, ρ and mechanical properties of 1# and 2# LDMCF under the same HTT and the same oxidative time showed distinct differences, attributed to the preparation of LDMCF precursors mesophase pitch under different pressures of oligomerization

关 键 词：氧化 电阻率 力学性能 取向度 CVD法 碳化硅连续纤维 炭芯 

分 类 号：TQ342.742[化学工程—化纤工业]