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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

中间相沥青纤维制备高导热炭材料的研究

马兆昆1,2, 史景利1, 刘朗1, 郭全贵1, 翟更太1   

  1. 1. 中国科学院山西煤炭化学研究所 炭材料重点实验室, 太原 030001; 2. 中国科学院研究生院, 北京 100049
  • 收稿日期:2005-10-10 修回日期:2005-12-26 出版日期:2006-09-20 网络出版日期:2006-09-20

High Thermal Conductivity Carbon Materials Made from Mesophase Pitch Fibers

MA Zhao-Kun1,2, SHI Jing-Li 1, LIU Lang 1, GUO Quan-Gui 1, ZHAI Geng-Tai1   

  1. 1. Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China; 2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2005-10-10 Revised:2005-12-26 Published:2006-09-20 Online:2006-09-20

PDF (PC)

2059

被引次数

15

摘要： 利用中间相沥青纤维中沥青分子的高度择优取向和适度的热塑性热压制备高导热块体炭材料. 对比研究了经不同氧化处理的带形及圆形中间相沥青纤维热压所得炭材料的传导性及力学性能.
结果表明: 相对圆形纤维来说, 由于带形中间相纤维具有更高的纤维轴向取向度和纤维之间更高的接触面积, 故其热压所得材料具有更高的密度和传导性. 经260℃氧化的带形纤维热压所得炭材料的密度、抗弯强度、电阻率及热导率分别达到了2.18g·cm-3、118.4MPa、1.13μΩm和717W/m·K.

关键词: 中间相沥青纤维, 不熔化, 热压, 高导热

Abstract: Block carbon materials with high thermal conductivities were prepared from mesophase pitch fibers by using their high preferred orientation of pitch molecular and appropriate thermoplasticity through a hot-pressing method. The conductivities and mechanical properties of carbon materials prepared separately from ribbon-shaped and round-shaped mesophase fibers at different oxidizing temperatures were compared and studied. Results show that compared with the round-shaped mesophase fibers, the ribbon-shaped mesophase fibers have higher preferred orientation and larger contact areas, so they have higher densities and conductivities. The density, bending strength, electrical resistivity and thermal conductivity of carbon materials prepared by using ribbon-shaped fibers oxidized at 260℃ and then sintered at 2800℃ are 2.18g·cm-3, 118.4MPa, 1.13μΩm and 717W/m·K, respectively.

Key words: mesophase pitch fibers, stabilization, hot-pressing, high thermal conductivity

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