CAJ | 학술논문

在硝酸钇的乙醇溶液中将钇电沉积于PAN基炭纤维上,采用扫描电子显微镜对炭纤维表面电沉积钇的表面形貌进行了观察.通过钇的电沉积电量来调节钇在PAN基炭纤维表面的担载量,采用X射线衍射分析仪考察了不同钇担载量对不同热处理温度下PAN基炭纤维的催化石墨化效果,通过Scherrer和Bragg方程分别计算了石墨表观微晶尺寸(L_c)和(002)面的层间距(d_(002)).结果表明,钇电沉积层对PAN基炭纤维具有明显的催化石墨化作用,在钇担载量为20%、热处理温度为2 400 ℃时,层间距d_(002)值最小,为3.362 ,相应的石墨化度为90%.钇对PAN基炭纤维的催化石墨化机理遵循碳化物分解和碳的熔解析出机理.
재초산을적을순용액중장을전침적우PAN기탄섬유상,채용소묘전자현미경대탄섬유표면전침적을적표면형모진행료관찰.통과을적전침적전량래조절을재PAN기탄섬유표면적담재량,채용X사선연사분석의고찰료불동을담재량대불동열처리온도하PAN기탄섬유적최화석묵화효과,통과Scherrer화Bragg방정분별계산료석묵표관미정척촌(L_c)화(002)면적층간거(d_(002)).결과표명,을전침적층대PAN기탄섬유구유명현적최화석묵화작용,재을담재량위20%、열처리온도위2 400 ℃시,층간거d_(002)치최소,위3.362 ,상응적석묵화도위90%.을대PAN기탄섬유적최화석묵화궤리준순탄화물분해화탄적용해석출궤리.
A yttrium layer was electrodeposited on the surface of PAN-based carbon fibers in yttrium nitrate ethanol solution,and the corresponding morphology of the yttrium layer was investigated through scan electron microscopy. The loading mass of the yttrium on the surface of PAN-based carbon fibers was controlled by the charge during the electrochemical deposition. The effect of yttrium on catalytic graphitization of PAN-based carbon fibers was investigated by X-ray diffraction (XRD). The mean crystallite size (Lc) and the interlayer spacing (d_(002)) were calculated with the Scherrer equation and the Bragg equation respectively. The corresponding results have indicated that yttrium has a good effect on the catalytic graphitization of PAN-based carbon fibers. At the high treatment temperature of 2 400 ℃ and with a yttrium content of 20%, the value of d_(002) is 3.362 . The catalytic mechanism of yttrium was also discussed.