Hard disordered phases produced at high-pressure-high-temperature treatment of C60

被引：40

作者：

Blank, VD

Denisov, VN

Ivlev, AN

Mavrin, BN ^{[1
]}

Serebryanaya, NR

Dubitsky, GA

Sulyanov, SN

Popov, MY

Lvova, NA

Buga, SG

Kremkova, GN

机构：

[1] Russian Acad Sci, Inst Spect, Troitsk 142092, Moscow Region, Russia

[2] Res Ctr Superhard Mat, Troitsk 142092, Moscow Region, Russia

[3] Russian Acad Sci, AV Shubnikov Crystallog Inst, Moscow 117333, Russia

来源：

CARBON | 1998年 / 36卷 / 09期

关键词：

fullerene; X-ray diffraction; Raman spectroscopy; infrared spectroscopy; mechanical properties;

D O I：

10.1016/S0008-6223(97)00203-0

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：

X-ray diffraction, hardness, conductivity, Raman and infrared studies of solid C-60 subjected simultaneously to high pressure at 8 GPa and temperatures up to 1820 K have been carried out. A hard disordered state is formed at temperatures higher than 920 K and a cross-linked layered structure is proposed for this state. Crystalline phases obtained at T < 920 K have a hardness near 1-2 GPa that rises strongly up to 38 GPa for disordered phases. The changes in the Raman and infrared spectra of the disordered phase are interpreted as a collapse of the C-60 cages and formation of an amorphous structure. The 3-D polymerization of solid C-60 at high-pressure-high-temperature treatment is discussed. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：1263 / 1267

页数：5

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