中国塑料 ›› 2024, Vol. 38 ›› Issue (6): 19-24.DOI: 10.19491/j.issn.1001-9278.2024.06.003

• 材料与性能 • 上一篇    下一篇

导热吸波双功能粉体改性设计研究

高玮1(), 熊昌义1, 韩飞1, 孔泥早2, 颜渊巍1()   

  1. 1.株洲时代新材料科技股份有限公司,湖南 株洲 412007
    2.湖南大学先进炭材料及应用技术湖南省重点实验室,长沙 410082
  • 收稿日期:2023-10-24 出版日期:2024-06-26 发布日期:2024-06-20
  • 通讯作者: 颜渊巍,yanyw@csrzic.com
    E-mail:gaowei01011213@163.com;yanyw@csrzic.com
  • 作者简介:高玮(1990-),女,硕士研究生,主要从事有机硅导热材料研究,gaowei01011213@163.com
  • 基金资助:
    湖南创新型省份建设专项项目(2022GK2034)

Study on modification and design of thermal conductive and microwave absorbing dual⁃functional powders

GAO Wei1(), XIONG Changyi1, HAN Fei1, KONG Nizao2, YAN Yuanwei1()   

  1. 1.Zhuzhou Times New Materials Technology Co,Ltd,Zhuzhou 412007,China
    2.Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology,Hunan University,Changsha 410082,China
  • Received:2023-10-24 Online:2024-06-26 Published:2024-06-20
  • Contact: YAN Yuanwei E-mail:gaowei01011213@163.com;yanyw@csrzic.com

摘要:

以氧化铝(Al2O3)为导热粉体,铁硅铝(FeSiAl)为吸波粉体,采用十二烷基三乙氧基硅氧烷(C12)为粉体表面改性剂,设计不同配比及粒径的导热吸波双功能粉体,填充于硅油体系制备导热吸波垫片,开发出导热吸波双功能一体化材料。结果表明,C12对Al2O3、FeSiAl均具有良好的亲油改性效果;当Al2O3∶FeSiAl质量比为20∶80时,导热吸波垫片的导热系数最高可达到5.92 W/m·K,并在4.8~6.5 GHz区间拥有良好的吸波能力,在保证高导热的前提下,赋予复合材料优异吸波能力;此外,所制试样易于压缩,在50 psi压缩应力条件下即可达到50 %压缩形变,便于实际装配应用。

关键词: 导热, 吸波, 改性, 压缩

Abstract:

A type of thermal conductive and microwave absorbing dual⁃functional powders were designed with different ratios and particle sizes using aluminum oxide (Al2O3) as thermal conductivity powders, sendust (FeSiAl) as microwave absorbing powders, and dodecyltriethoxysilane (C12) as a modifier. The resultant dual⁃functional powders were filled in a silicone oil to prepare a thermal conductive and microwave absorbing pad, thus developing a series of thermal conductivity absorbing dual⁃function integrated materials. The results indicated that C12 generated a good lipophilic modification effect on Al2O3 and FeSiAl. The thermal conductive and microwave absorbing pad showed a thermal conductivity of 5.92 W/(m·K) at a Al2O3/FeSiAl mass ratio of 20∶80, exhibiting a good absorbing capability in the frequency range of 4.8~6.5 GHz. Ensuring a high thermal conductivity, the as⁃prepared powders were endowed with a wave⁃absorbing capability. Meanwhile, it is easy for the powders to be compressed and convenient for practical assembly applications, and their 50⁃psi compression stress reached a compression strain of 50 %.

Key words: thermal conductivity, microwave absorbing, modification, compression

中图分类号: