中国物理B ›› 2015, Vol. 24 ›› Issue (8): 88107-088107.doi: 10.1088/1674-1056/24/8/088107

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

Microwave dielectric properties of Nextel-440 fiber fabrics with pyrolytic carbon coatings in the temperature range from room temperature to 700 ℃

宋荟荟, 周万城, 罗发, 卿玉长, 陈马林   

  1. State Key laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China
  • 收稿日期:2015-01-19 修回日期:2015-03-16 出版日期:2015-08-05 发布日期:2015-08-05
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 51072165) and the Fund of the State Key Laboratory of Solidification Processing in Northwestern Polytechnical University, China (Grant Nos. KP201307 and SKLSP201313).

Microwave dielectric properties of Nextel-440 fiber fabrics with pyrolytic carbon coatings in the temperature range from room temperature to 700 ℃

Song Hui-Hui (宋荟荟), Zhou Wan-Cheng (周万城), Luo Fa (罗发), Qing Yu-Chang (卿玉长), Chen Ma-Lin (陈马林)   

  1. State Key laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China
  • Received:2015-01-19 Revised:2015-03-16 Online:2015-08-05 Published:2015-08-05
  • Contact: Song Hui-Hui E-mail:songhuihui@mail.nwpu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 51072165) and the Fund of the State Key Laboratory of Solidification Processing in Northwestern Polytechnical University, China (Grant Nos. KP201307 and SKLSP201313).

摘要: Pyrolytic carbon (PyC) coatings are deposited on the Nextel-440 fiber fabrics by chemical vapor deposition (CVD). The dielectric properties of the Nextel-440 fiber fabrics with PyC coatings (Nextel-440/PyC) are investigated in a temperature range from room temperature to 700 ℃ in X-band. Compared with the permittivity of the original Nextel-440 received, the complex permittivity of the Nextel-440/PyC (the real part ε' and the imaginary part ε"), is significantly improved: ε' of the Nextel-440/PyC has a positive temperature coefficient, in contrast, ε" of the Nextel-440/PyC exhibits a negative temperature coefficient. Moreover, the reflection loss in units of dB is calculated. The results indicate that the microwave absorbing properties of the Nextel-440/PyC coatings is enhanced at 700 ℃ compared with that at lower temperatures.

关键词: pyrolytic carbon coating, chemical vapor deposition, dielectric property

Abstract: Pyrolytic carbon (PyC) coatings are deposited on the Nextel-440 fiber fabrics by chemical vapor deposition (CVD). The dielectric properties of the Nextel-440 fiber fabrics with PyC coatings (Nextel-440/PyC) are investigated in a temperature range from room temperature to 700 ℃ in X-band. Compared with the permittivity of the original Nextel-440 received, the complex permittivity of the Nextel-440/PyC (the real part ε' and the imaginary part ε"), is significantly improved: ε' of the Nextel-440/PyC has a positive temperature coefficient, in contrast, ε" of the Nextel-440/PyC exhibits a negative temperature coefficient. Moreover, the reflection loss in units of dB is calculated. The results indicate that the microwave absorbing properties of the Nextel-440/PyC coatings is enhanced at 700 ℃ compared with that at lower temperatures.

Key words: pyrolytic carbon coating, chemical vapor deposition, dielectric property

中图分类号:  (Chemical vapor deposition (including plasma-enhanced CVD, MOCVD, ALD, etc.))

  • 81.15.Gh
77.22.Gm (Dielectric loss and relaxation) 81.40.Tv (Optical and dielectric properties related to treatment conditions)