The evolution of crystalline structure in the preparation of PAN-based carbon fibers studied by whole powder pattern fitting

	The evolution of crystalline structure in the preparation of PAN-based carbon fibers studied by whole powder pattern fitting
	Zhang, CH; Sheng, Y; Tian, H; Xu, Y; Lu, CX; Wu, ZH; Wu ZH(吴忠华)
刊名	ACTA PHYSICA SINICA
	2011
卷号	60 期号:3 页码:36101
关键词	carbon fiber crystalline structure XRD whole powder pattern fitting method
通讯作者	[Zhang Cai-Hong ; Sheng Yi ; Tian Hong ; Xu Yao ; Lue Chun-Xiang] Chinese Acad Sci, Inst Coal Chem, Key Lab Carbon Mat, Taiyuan 030001, Peoples R China ; [Wu Zhong-Hua] Chinese Acad Sci, Inst High Energy Phys, Lab Synchrotron Radiat, Beijing 100049, Peoples R China ; [Zhang Cai-Hong ; Sheng Yi] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
英文摘要	Based on the Rietveld theory and Maud software, the evolution of crystalline structure of PAN-based carbon fibers was studied by investigating the different stages in the preparation of carbon fibers. The microstructure parameters of PAN fibers, oxidative fibers, and carbon fibers, including cell parameters, apparent crystal grain sizes, textural structure and micro-strain, were obtained from the named whole powder pattern fitting method for XRD result. Based on rigorus theory of crystallography, the whale powder pattern fitting treats the whole XRD powder diffraction pattern rather than individual diffraction peaks, resulting in higher credibility and precision. The results indicated that polymer chains were arranged along the axis of PAN fiber and the apparent crystallite size was about 6. 4 nm. After pre-oxidation, the originally ordered structure in PAN fiber was damaged and new less-ordered cyclic ladder structure was formed in the pre-oxidized PAN fibers, while the apparent crystallite size of fiber decreased obviously. With the carbonization process, the cyclic ladder structure of per-oxidized fibers transferred into layer structure similar to that of graphite. The layers were oriented along the axis of carbonized fiber that contributed to the X-ray diffraction, which comprised the apparent crystallite grains. As the carbonization temperature increased, size of the layer structure in the direction perpendicular to fiber axis increased clearly, the preferential orientation was enhanced and the layer structure became much more ordered.
学科主题	Physics
类目[WOS]	Physics, Multidisciplinary
研究领域[WOS]	Physics
原文出处	SCI
语种	英语
WOS记录号	WOS:000288925700063
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/240591]
专题	高能物理研究所_多学科研究中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Zhang, CH,Sheng, Y,Tian, H,et al. The evolution of crystalline structure in the preparation of PAN-based carbon fibers studied by whole powder pattern fitting[J]. ACTA PHYSICA SINICA,2011,60(3):36101.
APA	Zhang, CH.,Sheng, Y.,Tian, H.,Xu, Y.,Lu, CX.,...&吴忠华.(2011).The evolution of crystalline structure in the preparation of PAN-based carbon fibers studied by whole powder pattern fitting.ACTA PHYSICA SINICA,60(3),36101.
MLA	Zhang, CH,et al."The evolution of crystalline structure in the preparation of PAN-based carbon fibers studied by whole powder pattern fitting".ACTA PHYSICA SINICA 60.3(2011):36101.