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Advantages of natural microcrystalline graphite filler over petroleum coke in isotropic graphite preparation
Shen K; Huang ZH; Hu KX(胡开鑫); Shen WC; Yu SY; Yang JH; Yang GZ; Kang FY; Kang, FY (reprint author), Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China.
Source PublicationCARBON
2015-08
Volume90Pages:197-206
ISSN0008-6223
AbstractGraphite materials are used in high-temperature gas-cooled reactor (HTR) as moderator and reflector. Nuclear graphite is currently manufactured using coke as the filler; however, improvements in the performance of nuclear graphite are anticipated in order to enhance the safety and lifetime of HTRs. Natural microcrystalline graphite (MG), which is a metamorphic product of coal, is an emerging candidate as filler material. This paper proposes the approach of preparing isotropic graphite using MG fillers. The characterization results of MG ores and purified powder indicate a polycrystalline and near-isotropic structure of MG particles. Thus, near-isotropic graphite with an isotropy ratio of 1.10-1.15 can be easily obtained via cold isostatic pressing. The thermal diffusivity of MG-based green body is much higher than that of coke-based one, therefore facilitates the baking step. The advantages of MG-based graphite also include a high degree of graphitization, and a low coefficient of thermal expansion, both of which are highly beneficial to nuclear applications. As a result, MG exhibits a large potential for the application in isotropic nuclear graphite. (C) 2015 Elsevier Ltd. All rights reserved.
DOI10.1016/j.carbon.2015.03.068
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000356129200023
WOS Research AreaChemistry ; Materials Science
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary
Funding OrganizationNational Natural Science Foundation of China [51402166] ; China and China Postdoctoral Science Foundation [2014M550723]
DepartmentNML流动稳定性与复杂流动
Classification一类
Citation statistics
Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/54971
Collection国家微重力实验室
Corresponding AuthorKang, FY (reprint author), Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China.
Recommended Citation
GB/T 7714
Shen K,Huang ZH,Hu KX,et al. Advantages of natural microcrystalline graphite filler over petroleum coke in isotropic graphite preparation[J]. CARBON,2015,90:197-206
APA Shen K.,Huang ZH.,Hu KX.,Shen WC.,Yu SY.,...&Kang, FY .(2015).Advantages of natural microcrystalline graphite filler over petroleum coke in isotropic graphite preparation.CARBON,90,197-206.
MLA Shen K,et al."Advantages of natural microcrystalline graphite filler over petroleum coke in isotropic graphite preparation".CARBON 90(2015):197-206.
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