De-agglomeration and homogenisation of nanoparticles in coal tar pitch-based carbon materials

The structure of some commercial graphites and carbon materials (CMs) obtained by the low-temperature catalytic graphitization of coal tar pitch with iron salt, needle coke, foamed graphite as the catalysts has been studied. The study was performed using the X-ray diffraction technique with reflections from base plane and their decomposition into two components corresponding to the structural phases of graphite which have different XRD characteristics. Various CMs were compared with respect to the structural phase ratio, distance between polyarene layers in these phases, and sizes of the coherent scattering regions. The (004) reflection provided a better fit of some properties of graphites to the calculated XRD characteristics as compared to calculation from the (002) reflection. In the case of carbonization of coal tar pitch with investigated catalyst additions, prepared carbon materials have a higher degree of graphitization and a crystallite size greater than in the other case of carbonization of the individual pitch. The highest catalytic activity is shown by foamed graphite. It was found that the use of foamed graphite as the catalyst at 800-900 ºC produced carbon materials possessing a crystalline structure with interplanar spacing close to that in commercial graphites, while in the absence of catalyst the coal tar pitch material has an amorphous structure.

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Microstructure peculiarities of carbon materials based on coal-tar pitch hardened on the surface of thermally expanded graphite flakes

Solid Fuel Chemistry ◽

10.3103/s0361521913060025 ◽

2013 ◽

Vol 47 (6) ◽

pp. 365-369 ◽

Cited By ~ 3

Author(s):

A. V. Dmitriev

Keyword(s):

Carbon Materials ◽

Coal Tar ◽

Expanded Graphite ◽

Coal Tar Pitch ◽

Thermally Expanded Graphite

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Preparation of carbon materials by modeling of impregnating coal-tar pitch into carbon preform

Journal of Materials Processing Technology ◽

10.1016/j.jmatprotec.2005.11.003 ◽

2006 ◽

Vol 172 (3) ◽

pp. 424-430 ◽

Cited By ~ 3

Author(s):

C.Q. Ren ◽

T.H. Li ◽

Q.L. Lin ◽

H. Li ◽

X.Y. Sun

Keyword(s):

Carbon Materials ◽

Coal Tar ◽

Coal Tar Pitch ◽

Carbon Preform

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96/00281 Initial experiments with coal tar pitch preparation for production of new-generation high-quality carbon materials

Fuel and Energy Abstracts ◽

10.1016/0140-6701(96)86479-4 ◽

1996 ◽

Vol 37 (1) ◽

pp. 17

Keyword(s):

Carbon Materials ◽

Coal Tar ◽

Coal Tar Pitch ◽

High Quality ◽

New Generation

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Study on the Variety of Rheological Properties and Thermal Analysis of Modified Coal Tar Pitch with 1,4-Benzenedimethanol

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.602-603.304 ◽

2014 ◽

Vol 602-603 ◽

pp. 304-307 ◽

Cited By ~ 1

Author(s):

Wu Chao Shi ◽

Li Min Dong ◽

Qiang Li ◽

Chen Wang ◽

Tong Xiang Liang

Keyword(s):

Rheological Properties ◽

Apparent Viscosity ◽

Sulfonic Acid ◽

Carbon Materials ◽

Coal Tar ◽

Coaxial Cylinder ◽

Coal Tar Pitch ◽

Carbon Yield ◽

Toluene Sulfonic Acid ◽

Cylinder Viscometer

Coal tar pitch (CTP) as carbon material was studied using 1,4-Benzenedimethanol (PXG) as modifier by p-toluene sulfonic acid (PTS) catalyst and the variety of rheological properties of modified coal tar pitch (MTP) was discussed. The apparent viscosity of CTP and MTP were measured using rotating coaxial-cylinder viscometer, and the relations between the apparent viscosity and temperature were studied. Thermal behaviors of CTP and MTP were analyzed with TG-DSC. The results showed that the viscosity of the MTP gradually decreased with the temperature rising and the viscous activation energy of the MTP is 72.92 kJ·mol-1, which was beneficial to the process for producing carbon materials and the carbon yield was greatly improved. Therefore, coal tar pitch modified with PXG was qualified to be an excellent carbon precursor.

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Properties of silicon-containing carbon materials prepared using coal-tar pitch

Solid Fuel Chemistry ◽

10.3103/s0361521910020072 ◽

2010 ◽

Vol 44 (2) ◽

pp. 112-117 ◽

Cited By ~ 1

Author(s):

O. S. Efimova ◽

G. P. Khokhlova ◽

Yu. F. Patrakov

Keyword(s):

Carbon Materials ◽

Coal Tar ◽

Coal Tar Pitch

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Self-healing and Oxidation Resistance of B-Si Doped Carbon Materials Derived from Modification Coal Tar Pitch

High Temperature Materials and Processes ◽

10.1515/htmp-2015-0167 ◽

2017 ◽

Vol 36 (10) ◽

pp. 979-984

Author(s):

X.H. Zuo ◽

Z.J. Dong ◽

G.M. Yuan ◽

Z.W. Cui ◽

X.K. Li

Keyword(s):

Oxidation Resistance ◽

Carbon Materials ◽

Raw Materials ◽

Coal Tar ◽

Resistance Mechanism ◽

Coal Tar Pitch ◽

Self Healing ◽

Grain Sizes ◽

Si Doped ◽

Pyridine Borane

AbstractWith toluene soluble fraction of coal tar pitch, polycarbosilane and pyridine borane as raw materials, the modification coal tar pitch was synthesized by a liquid method. The B-Si-doped carbon materials were obtained by carbonization treatment at 800–1,600 °C for 1 h. The effects of carbonization temperatures on the composition, microstructure and oxidation resistance of the B-Si-doped carbon materials were investigated by XRD, SEM and TG-DSC. The results showed that the B-Si-doped carbon materials were composed of B2O3 and carbon. SiC crystal grains appeared when the carbonization temperatures were over 1,200 °C. The higher the carbonization temperatures were, the larger the SiC grain sizes of B-Si-doped carbon materials became. But oxidation rate of larger grain sizes of SiC was slow during oxidation. It was difficult to form a protective glassy film on the surface of the materials rapidly. Therefore, the B-Si-doped carbon materials obtained by carbonization at 1,200 °C showed better oxidation resistance. Oxidation resistance mechanism of B-Si-doped carbon materials was illustrated. The SiO2 produced by the oxidation of SiC and B2O3 formed protective glassy film, which had self-healing and anti-oxidation synergism.

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