Graphite blocks with high thermal conductivity derived from natural graphite flake

Guo, Quangui; Shi, Jingli; Zhai, Gengtai

doi:10.1016/j.carbon.2007.11.050

Cited by 139 publications

(47 citation statements)

References 16 publications

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“…Milled NG, mesophase pitch (29 wt.%) as well as bi-dopants (4 wt.% Si and 12 wt.% Ti) were mixed for about 30 min in a ball-milling machine with polyethylene and distilled water as the solvent; then, the mixture was compacted in a graphite mold and pressed uni-axially to cylindrical bodies by a hot-pressing apparatus with a heating rate of 300°C/h up to 2700°C; after heating, the processing dwelled for 0.5 h under this condition and then provided a pressure of 30 MPa. During the final procedure, the mixture would creep into solution gradually and resulted in graphite blocks [32].…”

Section: Preparation Of Materialsmentioning

confidence: 99%

Atomic scale investigations of catalyst and catalytic graphitization in a silicon and titanium doped graphite

Lin

Feng

Guo

et al. 2015

Carbon

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Section: Preparation Of Materialsmentioning

confidence: 99%

Atomic scale investigations of catalyst and catalytic graphitization in a silicon and titanium doped graphite

Lin

Feng

Guo

et al. 2015

Carbon

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“…Graphite is usually recognized as the best conductive filler because of its good thermal conductivity, low cost and fair dispersability in polymer matrix (Causin et al, 2006) and (Tu & Ye, 2009). Single graphene sheets constituting graphite show intrinsically high thermal conductivity of about 800 W/m K (Liu et al, 2008) or higher (theoretically estimated to be as high as 5300 W/m K ( Veca et al, 2009) and (Stankovich et al, 2006)), this determining the high thermal conductivity of graphite, usually reported in the range from 100 to 400 W/m K. Expanded graphite (EG), an exfoliated form of graphite with layers of 20-100 nm thickness, has also been used in polymer composites (Ganguli et al, 2008), for which the thermal conductivity depends on the exfoliation degree (Park et al, 2008), its dispersion in matrix and the aspect ratio of the EG (Kalaitzidou et al, 2007).…”

Section: Carbon-based Fillersmentioning

confidence: 99%

Thermal Conductivity of Nanoparticles Filled Polymers

Ebadi‐Dehaghani¹,

Nazempour²

2012

Smart Nanoparticles Technology

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“…In all the three mixes while carrying out the compaction process initially the powder was compacted to an initial pressure of 5 MPa the displacement values of the top punch were recorded. All mixes were compacted at a maximum pressure of 550 MPa with definite increment of pressure and for every pre-set value of these pressures the displacements of the top punch from the initial position are recorded [9,10].…”

Section: Compaction Of Formulations By Die Compaction Experiments Cmentioning

confidence: 99%

Evaluation of Physico-Chemical, Thermal and Mechanical Properties of Sintered Graphite and Mesophase Formulations

G¹,

Sp²

2016

J Material Sci Eng

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Carbon/graphite materials are widely applied to the areas of seal and friction materials. These applications exploit the exceptional properties of carbon/graphite, such as its excellent mechanical behavior at high temperature and low reactivity. However, Owing to high open porosity, and low strength conventional carbon/graphite materials prepared using pulverized coke as filler and pitch as binder fall across enormous challenge. Therefore, it is necessary to reduce the open porosity and increase in the strength along with thermal conductivity. Using natural graphite as filler instead of coke to prepare carbon blocks can avoid high-temperature graphitization and repeated dipping owing to the high degree of graphitization and high thermal stability of natural graphite; thus it can simplify the working process, save energy and reduce cost. Carbonaceous mesophase has inherent properties, such as a high softening point, high fluidity, high carbon yield, and graphitizability, which make it suitable for the fabrication of polygranular carbon materials. Furthermore, it can be used as a binder. The sintering was performed in a static furnace with argon atmosphere and compared with the same compound sintered in passage furnace with hydrogen and nitrogen atmosphere. The analysis of the properties of the tested material was performed with the aid of metallography using a scanning electron microscope, which verified the particle size distribution, chemical elements and pores present. However, for the graphite powder and zinc stearate, present in smaller percentages were disregarded its influence on the physical properties of the compound generated. Compressibility and compaction are parameters that indicate and describe the behavior of metal powders as they are compressed. The ability of a powder densification is related to compressibility. Already compaction is defined as the stability of the structure of the pressed compacted to a certain working pressure. Therefore, the natural graphite as filler and mesophase pitch as binder can be able to produce high density graphite blocks. The main aim of this work is to produce isotropic graphite material and evaluation of its properties such as high density, high thermal conductivity, high electrical resistivity, low coefficient of thermal expansion, and high compressive strength from natural graphite powder mesophase pitch.

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Graphite blocks with high thermal conductivity derived from natural graphite flake

Cited by 139 publications

References 16 publications

Atomic scale investigations of catalyst and catalytic graphitization in a silicon and titanium doped graphite

Atomic scale investigations of catalyst and catalytic graphitization in a silicon and titanium doped graphite

Thermal Conductivity of Nanoparticles Filled Polymers

Evaluation of Physico-Chemical, Thermal and Mechanical Properties of Sintered Graphite and Mesophase Formulations

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