Homogenous and highly isotropic graphite produced from mesocarbon microbeads

Shen, Ke; Huang, Zheng‐Hong; Shen, Wei; Yang, Jing; Yang, Guangzhi; Yu, Suyuan; Kang, Feiyu

doi:10.1016/j.carbon.2015.06.034

Cited by 35 publications

(14 citation statements)

References 15 publications

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“…CB3003-1 shows the highest flexural strength of 69.2 MPa among the CB3003-1, CB3303-1 and CB3603-1 samples. In addition, the flexural strength of CB3003-1 in this study was higher than the previously reported value of approximately 60 MPa [32] .…”

Section: Resultscontrasting

confidence: 92%

Manufacture of high density carbon blocks by self-sintering coke produced via a two-stage heat treatment of coal tar

Kim

Lee

et al. 2019

Heliyon

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High-strength and high-density carbonized carbon blocks from self-sintering coke were manufactured using coal tar and two-stage heat treatments (1st and 2nd stage treatments). First, the molecular weight distribution of the refined coal tar was controlled through a pressured heat treatment (1st stage treatment). Second, the 1st stage heat-treated coal tar (1S-CT) was treated using a delayed coking system (2nd stage treatment) to become the self-sintering coke. Finally, carbon blocks were molded from 2nd stage heat-treated coke (2S-C) and carbonized at 1200 °C for 1 h. Through rapid decomposition of the high molecular weight components in the coal tar at 360 °C in the 1st stage treatment, the molecular weight distribution of coal tar was confirmed to be controllable by the 1st stage treatment. Swelling during carbonization was observed in carbon blocks manufactured from 2S-C containing more than 15 wt% of volatile matter from 150–450 °C. The optimum conditions of the two-stage heat treatments were confirmed to be 300 °C for 3 h and 500 °C for 1 h. The highest density and flexural strength of the carbonized carbon blocks manufactured from 2S-C were 1.46 g/cm3 and 69.2 MPa, respectively.

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Section: Resultscontrasting

confidence: 92%

Manufacture of high density carbon blocks by self-sintering coke produced via a two-stage heat treatment of coal tar

Kim

Lee

et al. 2019

Heliyon

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“…In addition, the bulk density and the volume shrinkage increased with the graphitization temperature (Supplementary Table 2). This is because the graphitization, which changes a turbostratic structure to the 3D-ordered graphite lattice, reduces the interlayer spacing and causes a van der waals force favouring the shear stresses that produce a fracture of GCB 8,44,45 . As described above, the bulk density is an important factor for improving the flexural strength of GCBs, and the addition of 2 wt.…”

Section: Resultsmentioning

confidence: 99%

Mechanical and electrical properties of MCMB/Chopped carbon fiber composite with different bead size

Kim

Lee

et al. 2019

Sci Rep

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The carbonization and graphitization of carbon/carbon (C/C) composites prepared from mesocarbon microbeads (MCMB) and chopped carbon fiber (CCF) have been studied with a wide range of temperatures, CCF contents and MCMB sizes. Three different sizes of MCMB were prepared with coal tar pitch at three temperatures, 420, 430 and 440 °C, and identified as about 12.8, 16.0 and 20.1 µm, respectively. Each size of MCMB was mixed with CCFs at ratios of 2, 4, 6 and 8 wt. % and formed into block shape. After carbonization at 1200 °C, carbonized C/C blocks (CCBs) were graphitized at 2000, 2400 and 2800 °C. The CCB prepared with CCF content of 2 wt. % and an MCMB size of 16.0 µm exhibited the highest flexural strength of about 151 MPa. The graphitized C/C block (GCB) with CCF content of 2 wt. %, which was graphitized at 2000 °C showed the highest flexural strength of about 159 MPa.

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“…The production of the commercial isotropic graphite involves multiple steps; initially, the carbon precursor is compacted by isostatic pressing followed by carbonization at a temperature near 1000 °C and graphitization at 2500 °C [4]. Generally, precursors like coke, pitch, phenolic resin, and mesocarbon are used in this process [4][5][6]. This process involves many days mainly due to the slow heating and cooling rates to minimize the thermal stress and to maximize the yield of the carbon during carbonization [4].…”

Section: Introductionmentioning

confidence: 99%

Conversion of diamond polishing powder to high-density isotropic nano-crystalline graphite through spark plasma sintering

et al. 2020

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Conversion of diamond polishing powders into graphite nano-crystals and simultaneous densification to high-density graphite were achieved through spark plasma sintering at 2000 °C with 45 MPa pressure. The sintered graphite had a density of 1.84 g/cm 3 and hardness of 12.1 ± 0.4 HV. The phase evolution was characterized by X-ray diffraction and Raman spectroscopy. Scanning electron microscopy and transmission electron microscopy revealed that the converted highdensity graphite consisted of randomly oriented nano-crystalline grains. The formed graphite was also isotropic in nature.

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Homogenous and highly isotropic graphite produced from mesocarbon microbeads

Cited by 35 publications

References 15 publications

Manufacture of high density carbon blocks by self-sintering coke produced via a two-stage heat treatment of coal tar

Manufacture of high density carbon blocks by self-sintering coke produced via a two-stage heat treatment of coal tar

Mechanical and electrical properties of MCMB/Chopped carbon fiber composite with different bead size

Conversion of diamond polishing powder to high-density isotropic nano-crystalline graphite through spark plasma sintering

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