The key role of microtexture in the graphitisation of PBO fibre chars as seen by X-ray scattering and transmission electron microscopy

被引：5

作者：

Vazquez-Santos, M. B. ^{[2
]}

Martinez-Alonso, A. ^{[2
]}

Tascon, J. M. D. ^{[2
]}

Rouzaud, J. -N. ^{[3
]}

Geissler, E. ^{[4
]}

Laszlo, K. ^{[1
]}

机构：

[1] Budapest Univ Technol & Econ, Dept Phys Chem & Mat Sci, H-1521 Budapest, Hungary

[2] CSIC, Inst Nacl Carbon, E-33080 Oviedo, Spain

[3] CNRS, Lab Geol Ecole Normale Super, UMR 8538, F-75231 Paris 5, France

[4] Univ Grenoble 1, Spectrometrie Phys Lab, CNRS, UMR 5588, F-38402 St Martin Dheres, France

来源：

CARBON | 2010年 / 48卷 / 13期

关键词：

CARBON-FIBERS;

D O I：

10.1016/j.carbon.2010.06.032

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Poly(p-phenylene benzobisoxazole) (PBO) fibres, heat-treated between 900 and 2700 degrees C, were studied by both small- and wide-angle X-ray scattering, and by HRTEM. As directly imaged by HRTEM, the material treated at 900 degrees C consists of nanometre-sized graphitic domains with a microtexture that resembles non-graphitisable carbon. However, above 2000 degrees C, these elongated structures coalesce, yielding highly graphitised lamellar carbon. This graphitisation mode is very different from the conventional progressive graphitisation of lamellar carbon. It is similar to that of polyimide films, and is characterized by a preferential planar orientation of the polyaromatic structural units inherited from the pristine fibre microtexture. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：3968 / 3970

页数：3

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