Elastic properties of monolithic porous blocks of compressed expanded graphite related to their specific surface area and pore diameter

Krzesinska  M; Lachowski  AI

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Elastic properties of monolithic porous blocks of compressed expanded graphite related to their specific surface area and pore diameter

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Highly porous monolithic blocks of compressed expanded graphite (CEG) with various apparent densities ranging from 0.026 to 0.276 g cm(-3), produced of initial expanded graphite of an apparent density of 4 g l(-1), were characterized using a gas helium pycnometer, a mercury porosimetry and physical adsorption of N-2 gas at 77 K. The dynamic elastic module of CEG cubes were determined by means of measurements of the velocity of the longitudinal ultrasonic wave (frequency of 100 kHz) propagated along three mutually orthogonal directions: parallel and perpendicular to the bedding plane (or the uniaxial compression direction). CEG was found to be characterized by macropores and mesopores of various diameters. The most probable sizes of pores are 10, 2.4, and 0.9 mum, 4 and 2.5 nm. The elastic properties were related to the porous structure of CEG-represented by the volume of open and closed pores, specific surface area S-BET and pore diameter. (C) 2004 Elsevier B.V. All rights reserved.

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《Materials Chemistry and Physics》 |2004年第1期|105-111|共7页
作者
Krzesinska M; Lachowski AI;
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作者单位

Polish Acad Sci, Inst Coal Chem, PL-44121 Gliwice, Poland;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种英语
中图分类工程材料学;
关键词
porous materials; compaction; ultrasonic measurements; elastic properties; surface properties; EXFOLIATED GRAPHITE;

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Elastic properties of monolithic porous blocks of compressed expanded graphite related to their specific surface area and pore diameter

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