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原料配比对石墨材料热传导性能的影响
引用本文:邱海鹏,郭全贵,宋永忠,翟更太,刘朗.原料配比对石墨材料热传导性能的影响[J].材料科学与工艺,2002,10(3):225-230.
作者姓名:邱海鹏  郭全贵  宋永忠  翟更太  刘朗
作者单位:中国科学院,山西煤炭化学研究所,山西,太原,030001
基金项目:国家自然科学重点基金资助项目(197895037),山西省青年科技基金资助项目(20001025).
摘    要:以煅烧石油焦和煤沥青为基本原料,采用热压工艺制备了一系列石墨材料,考察了煅烧石油焦填料的粒度分布以及粘结剂用量对石墨材料的传导性能的影响,并阐明了粘结剂与填料粒子在热混捏与热压过程中相互作用原理。结果表明:石墨材料的传导性能不仅依赖于原料种类,粒度,而且与其质量配比有关,有最佳原料配比所制备的块状石墨具有高密度,低孔率,低电阻以及高导热等特点;填料煅烧石油焦颗粒以及粘结剂用量的过多或过少,都不利于石墨材料的传导性能,本文填料中最佳煅烧石油焦颗粒用量为25%,原料中最佳粘结剂含量为25%。

关 键 词:原料配比  块状石墨  热导率  煅烧  电阻率  石油焦  煤沥青  热压工艺  热传导性能
文章编号:1005-0299(2002)03-0225-06
修稿时间:2001年5月20日

Effect of the composition of start materials on thermal conductivity of bulk graphite
QIU Hai-peng,GUO Quan-gui,SONG Yong-zhong,ZHAI Geng-tai,LIU Lang.Effect of the composition of start materials on thermal conductivity of bulk graphite[J].Materials Science and Technology,2002,10(3):225-230.
Authors:QIU Hai-peng  GUO Quan-gui  SONG Yong-zhong  ZHAI Geng-tai  LIU Lang
Abstract:The bulk graphite was prepared from raw materials of calcined coke and coal-tar pitch by the hot-pressing process in order that the effects of the binder and calcined coke grain content on the conductivity of the bulk graphite can been investigated. Experimental results show that bulk graphite of optimized composition for raw materials posses higher level of bulk density & thermal conductivity and much lower porosity & electrical resistivity compared with ones made from other raw materials. It is unfavorable for improvement of conductivity of the bulk graphite to use over more or less grain size and binder content. The optimized content of 25% was achieved for both grain of filler and binder of raw materials in the present studying. Based on the experimental results, the interaction mechanism of the calcined coke grain and the binder in the processes of hot-blinding and hot-pressing has been established.
Keywords:start materials composition  bulk graphite  thermal conductivity  elelctrical resistivity
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