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›› 2012, Vol. 12 ›› Issue (1): 160-165.

• 材料工程专栏 • 上一篇    下一篇

两步溶液浸渍法提高石墨材料的高温抗氧化性能

邓亚利 仉小猛 魏连启 叶树峰 陈运法   

  1. 中国科学院过程工程研究所多相复杂系统国家重点实验室 中国科学院过程工程研究所 中国科学院过程工程研究所 中国科学院过程工程研究所 中国科学院过程工程研究所
  • 收稿日期:2011-11-23 修回日期:2012-02-08 出版日期:2012-02-20 发布日期:2012-02-20
  • 通讯作者: 邓亚利

Improvement in Anti-oxidation of Two-step Dipping Graphite with Different Solutions

DENG Ya-li ZHANG Xiao-meng Lianqi Wei YE Shu-feng CHEN Yun-fa   

  1. State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences State Key Lab. Multiphase Complex System, Inst. Process Eng., Chinese Academy of Sciences State Key Lab. Multiphase Complex System, Inst. Process Eng., Chinese Academy of Sciences State Key Lab. Multiphase Complex System, Inst. Process Eng., Chinese Academy of Sciences State Key Lab. Multiphase Complex System, Inst. Process Eng., Chinese Academy of Sciences
  • Received:2011-11-23 Revised:2012-02-08 Online:2012-02-20 Published:2012-02-20
  • Contact: DENG Ya-li

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摘要： 用2种浸渍液采用两步浸渍法对石墨材料进行浸渍处理，以提高其高温抗氧化性能. 浸渍液一的主要组分为MgCl2, Al(OH)3, H3PO4；浸渍液二的主要组分为硼砂、三聚磷酸钠及TiO2. 采用SEM, TG-DTA, XRD分析了浸渍后材料的化学组成、结构及氧化失重. 结果表明，在1150℃空气中氧化1 h，石墨失重率小于10%，其抗氧化性能比未经处理的空白样提高60%. 处理后的石墨在高温作用后其表面结构致密且边缘棱角分明，与空白样有明显区别. 2种浸渍液在高温作用下生成了玻璃聚合体，附着在石墨表面及孔隙中，起到抗氧化作用.

关键词: 两步法浸渍, 石墨, 抗氧化, 高温

Abstract: A two-step dipping method was used to treat graphite with two solutions for improving its oxidation resistance. One dipping solution was mainly composed of magnesium chloride, aluminum hydroxide, phosphoric acid and another one borax, sodium tripolyphosphate, titanium dioxide. The composition and structure and mass change of the dipped graphite were analyzed by SEM, TG-DTA and XRD. The results showed that the mass loss of dipped graphite sample was less than 10% in air at 1150℃ for 1 h and the oxidation resistance was increased by 60% compared with untreated blank sample. The treated sample had flat surface, compact structure and clear edge after high temperature treatment, which was different from blank sample. The two kinds of dipping solution in high temperature formed glass polymer which was attached on the surface and pores of graphite, playing the role of oxidation resistance.

Key words: two-step dipping method, graphite, oxidation resistance, high temperature

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